4A


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                        WISCONSIN PUBLIC SERVICE CORPORATION

                                                         AS ISSUER

                                         TO

                 FIRSTAR BANK MILWAUKEE, N.A., NATIONAL ASSOCIATION

                                                         AS TRUSTEE



                               ----------------------

                                     INDENTURE


                               SENIOR DEBT SECURITIES

                            DATED AS OF DECEMBER 1, 1998

                               ----------------------

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                               TABLE OF CONTENTS



                                                                                  PAGE
                                                                               
RECITALS OF THE COMPANY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
ARTICLE I        DEFINITIONS AND OTHER PROVISIONS OF
                 GENERAL APPLICATION. . . . . . . . . . . . . . . . . . . . . . . . 2

     SECTION 1.01.       Definitions. . . . . . . . . . . . . . . . . . . . . . . . 2
          (a)    "ACT," . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
          (b)    "AFFILIATE". . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
          (c)    "AUTHENTICATING AGENT" . . . . . . . . . . . . . . . . . . . . . . 2
          (d)    "BANKRUPTCY LAW" . . . . . . . . . . . . . . . . . . . . . . . . . 2
          (e)    "BOARD OF DIRECTORS" . . . . . . . . . . . . . . . . . . . . . . . 3
          (f)    "BOARD RESOLUTION" . . . . . . . . . . . . . . . . . . . . . . . . 3
          (g)    "BONDHOLDER" . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
          (h)    "BUSINESS DAY,". . . . . . . . . . . . . . . . . . . . . . . . . . 3 
          (i)    "CAPITAL LEASE". . . . . . . . . . . . . . . . . . . . . . . . . . 3
          (j)    "CAPITALIZATION" . . . . . . . . . . . . . . . . . . . . . . . . . 3
          (k)    "COLLATERAL BONDS,". . . . . . . . . . . . . . . . . . . . . . . . 3
          (l)    "COMMISSION" . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
          (m)    "COMPANY". . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
          (n)    "COMPANY REQUEST" or "COMPANY ORDER" . . . . . . . . . . . . . . . 4
          (o)    "CORPORATE TRUST OFFICE" . . . . . . . . . . . . . . . . . . . . . 4
          (p)    "COVENANT DEFEASANCE". . . . . . . . . . . . . . . . . . . . . . . 4
          (q)    "CUSTODIAN". . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
          (r)    "DEBT" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
          (s)    "DEFAULT". . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
          (t)    "DEFAULTED INTEREST" . . . . . . . . . . . . . . . . . . . . . . . 4
          (u)    "DEFEASANCE" . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
          (v)    "DEPOSITARY" . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
          (w)    "DOLLARS" and "$". . . . . . . . . . . . . . . . . . . . . . . . . 4
          (x)    "EVENT OF DEFAULT" . . . . . . . . . . . . . . . . . . . . . . . . 4
          (y)    "EXCHANGE ACT" . . . . . . . . . . . . . . . . . . . . . . . . . . 5
          (z)    "EXPERT" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
          (aa)   "FIRST MORTGAGE BONDS" . . . . . . . . . . . . . . . . . . . . . . 5
          (bb)   "FIRST MORTGAGE INDENTURE" . . . . . . . . . . . . . . . . . . . . 5
          (cc)   "GAAP" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
          (dd)   "GLOBAL SECURITY". . . . . . . . . . . . . . . . . . . . . . . . . 5
          (ee)   "HOLDER" or "SECURITY HOLDER". . . . . . . . . . . . . . . . . . . 5
          (ff)   "HYBRID PREFERRED SECURITIES". . . . . . . . . . . . . . . . . . . 5

                                       -i-



                                                                                  PAGE
                                                                               
          (gg)   "HYBRID PREFERRED SECURITIES SUBSIDIARY" . . . . . . . . . . . . . 6
          (hh)   "INDENTURE". . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
          (ii)   "INITIAL SECURITIES" . . . . . . . . . . . . . . . . . . . . . . . 6
          (jj)   "INTEREST,". . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
          (kk)   "INTEREST PAYMENT DATE," . . . . . . . . . . . . . . . . . . . . . 6
          (ll)   "JUNIOR SUBORDINATED INDEBTEDNESS" . . . . . . . . . . . . . . . . 6
          (mm)   "LIEN,". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
          (nn)   "MATURITY,". . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
          (oo)   "MORTGAGE,". . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
          (pp)   "MORTGAGE TRUSTEE,". . . . . . . . . . . . . . . . . . . . . . . . 6
          (qq)   "NET TANGIBLE ASSETS". . . . . . . . . . . . . . . . . . . . . . . 6
          (rr)   "OFFICER". . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
          (ss)   "OFFICER'S CERTIFICATE". . . . . . . . . . . . . . . . . . . . . . 7
          (tt)   "OPERATING PROPERTY" . . . . . . . . . . . . . . . . . . . . . . . 7
          (uu)   "OPINION OF COUNSEL" . . . . . . . . . . . . . . . . . . . . . . . 7
          (vv)   "ORIGINAL ISSUE DISCOUNT SECURITY" . . . . . . . . . . . . . . . . 7
          (ww)   "OUTSTANDING," . . . . . . . . . . . . . . . . . . . . . . . . . . 7
          (xx)   "PAYING AGENT" . . . . . . . . . . . . . . . . . . . . . . . . . . 8
          (yy)   "PERSON" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
          (zz)   "PLACE OF PAYMENT,". . . . . . . . . . . . . . . . . . . . . . . . 8
          (aaa)  "REDEMPTION DATE," . . . . . . . . . . . . . . . . . . . . . . . . 8
          (bbb)  "REDEMPTION PRICE,". . . . . . . . . . . . . . . . . . . . . . . . 8
          (ccc)  "REGULAR RECORD DATE". . . . . . . . . . . . . . . . . . . . . . . 8
          (ddd)  "RELATED SERIES OF COLLATERAL BONDS" . . . . . . . . . . . . . . . 9
          (eee)  "RELATED SERIES OF SECURITIES" . . . . . . . . . . . . . . . . . . 9
          (fff)  "RELATED SERIES OF SUBSTITUTED COLLATERAL BONDS,". . . . . . . . . 9
          (ggg)  "RELEASE DATE,". . . . . . . . . . . . . . . . . . . . . . . . . . 9
          (hhh)  "RESPONSIBLE OFFICER," . . . . . . . . . . . . . . . . . . . . . . 9
          (iii)  "SALE AND LEASE-BACK TRANSACTION". . . . . . . . . . . . . . . . . 9
          (jjj)  "SECURITIES" . . . . . . . . . . . . . . . . . . . . . . . . . . .10
          (kkk)  "SECURITY REGISTER" and "SECURITY REGISTRAR". . . . . . . . . . . 10
          (lll)  "SPECIAL RECORD DATE" . . . . . . . . . . . . . . . . . . . . . . 10
          (mmm)  "STATED MATURITY,". . . . . . . . . . . . . . . . . . . . . . . . 10
          (nnn)  "SUBSIDIARY". . . . . . . . . . . . . . . . . . . . . . . . . . . 10
          (ooo)  "SUBSTITUTED COLLATERAL BONDS," . . . . . . . . . . . . . . . . . 10
          (ppp)  "SUBSTITUTED MORTGAGE INDENTURE". . . . . . . . . . . . . . . . . 10
          (qqq)  "TRUST INDENTURE ACT" . . . . . . . . . . . . . . . . . . . . . . 10
          (rrr)  "TRUSTEE" . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
          (sss)  "U.S. GOVERNMENT OBLIGATIONS" . . . . . . . . . . . . . . . . . . 10
          (ttt)  "VALUE" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
          (uuu)  "VICE PRESIDENT," . . . . . . . . . . . . . . . . . . . . . . . . 11

                                       -ii-



                                                                                  PAGE
                                                                               
     SECTION 1.02.       Compliance Certificates and Opinions. . . . . . . . . . . 11
     SECTION 1.03.       Form of Documents Delivered to Trustee. . . . . . . . . . 12
     SECTION 1.04.       Acts of Holders.. . . . . . . . . . . . . . . . . . . . . 12
     SECTION 1.05.       Notices, Etc., to Trustee and Company.. . . . . . . . . . 13
     SECTION 1.06.       Notice to Holders; Waiver.. . . . . . . . . . . . . . . . 14
     SECTION 1.07.       Conflict with Trust Indenture Act.. . . . . . . . . . . . 14
     SECTION 1.08.       Effect of Headings and Table of Contents. . . . . . . . . 15
     SECTION 1.09.       Successors and Assigns. . . . . . . . . . . . . . . . . . 15
     SECTION 1.10.       Separability Clause.. . . . . . . . . . . . . . . . . . . 15
     SECTION 1.11.       Benefits of Indenture.. . . . . . . . . . . . . . . . . . 15
     SECTION 1.12.       Governing Law.. . . . . . . . . . . . . . . . . . . . . . 15
     SECTION 1.13.       Legal Holidays. . . . . . . . . . . . . . . . . . . . . . 15
     SECTION 1.14.       No Recourse Against Others. . . . . . . . . . . . . . . . 15

ARTICLE II       SECURITY FORMS. . . . . . . . . . . . . . . . . . . . . . . . . . 17
     SECTION 2.01.       Forms Generally.. . . . . . . . . . . . . . . . . . . . . 17
     SECTION 2.02.       Form of Face of Security. . . . . . . . . . . . . . . . . 17
     SECTION 2.03.       Form of Reverse of Security.. . . . . . . . . . . . . . . 20
     SECTION 2.04.       Form of Trustee's Certificate of Authentication.. . . . . 26
     SECTION 2.05.       Securities Issuable in the Form of a Global
                         Security. . . . . . . . . . . . . . . . . . . . . . . . . 26
     SECTION 2.06.       CUSIP Number. . . . . . . . . . . . . . . . . . . . . . . 28
     SECTION 2.07.       Payment of Securities.. . . . . . . . . . . . . . . . . . 28

ARTICLE III      THE SECURITIES. . . . . . . . . . . . . . . . . . . . . . . . . . 30
     SECTION 3.01.       Amount Unlimited; Issuable in Series. . . . . . . . . . . 30
     SECTION 3.02.       Denominations.. . . . . . . . . . . . . . . . . . . . . . 32
     SECTION 3.03.       Execution, Authentication, Delivery and Dating. . . . . . 32
     SECTION 3.04.       Temporary Securities. . . . . . . . . . . . . . . . . . . 35
     SECTION 3.05.       Registration, Registration of Transfer and Exchange.. . . 35
     SECTION 3.06.       Mutilated, Destroyed, Lost and Stolen Securities. . . . . 36
     SECTION 3.07.       Payment of Interest; Interest Rights Preserved. . . . . . 37
     SECTION 3.08.       Persons Deemed Owners . . . . . . . . . . . . . . . . . . 38
     SECTION 3.09.       Cancellation. . . . . . . . . . . . . . . . . . . . . . . 39
     SECTION 3.10.       Computation of Interest.. . . . . . . . . . . . . . . . . 39

ARTICLE IV       COLLATERAL BONDS; PLEDGED SUBSTITUTED COLLATERAL BONDS. . . . . . 40
     SECTION 4.01.       Delivery and Acceptance of Collateral Bonds . . . . . . . 40
     SECTION 4.02.       Terms of Collateral Bonds . . . . . . . . . . . . . . . . 40
     SECTION 4.03.       Collateral Bonds Held by the Trustee. . . . . . . . . . . 40
     SECTION 4.04.       No Transfer of Collateral Bonds; Exception. . . . . . . . 40
     SECTION 4.05.       Delivery to the Company of All Collateral Bonds . . . . . 41

                                       -iii-



                                                                                  PAGE
                                                                               
     SECTION 4.06.       Further Assurances. . . . . . . . . . . . . . . . . . . . 41
     SECTION 4.07.       Exchange and Surrender of Collateral Bonds. . . . . . . . 41
     SECTION 4.08.       Collateral Bonds as Security for Securities;
                         Application of Payment on Collateral Bonds. . . . . . . . 42
     SECTION 4.09.       Substituted Collateral Bonds. . . . . . . . . . . . . . . 43
     SECTION 4.10.       Fair Value Certificate. . . . . . . . . . . . . . . . . . 44

ARTICLE V        SATISFACTION AND DISCHARGE. . . . . . . . . . . . . . . . . . . . 46
     SECTION 5.01.       Satisfaction and Discharge of Indenture.. . . . . . . . . 46
     SECTION 5.02.       Application of Trust Money. . . . . . . . . . . . . . . . 47

ARTICLE VI       REMEDIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
     SECTION 6.01.       Events of Default.. . . . . . . . . . . . . . . . . . . . 48
     SECTION 6.02.       Acceleration of Maturity and Rescission.. . . . . . . . . 49
     SECTION 6.03.       Collection of Indebtedness and Suits for
                         Enforcement by Trustee. . . . . . . . . . . . . . . . . . 50
     SECTION 6.04.       Trustee May File Proofs of Claim. . . . . . . . . . . . . 51
     SECTION 6.05.       Trustee May Enforce Claims Without Possession of
                         Securities. . . . . . . . . . . . . . . . . . . . . . . . 52
     SECTION 6.06.       Application of Money Collected. . . . . . . . . . . . . . 52
     SECTION 6.07.       Limitation on Suits.. . . . . . . . . . . . . . . . . . . 53
     SECTION 6.08.       Unconditional Right of Holders to Receive
                         Principal, Premium and Interest . . . . . . . . . . . . . 53
     SECTION 6.09.       Restoration of Rights and Remedies. . . . . . . . . . . . 54
     SECTION 6.10.       Rights and Remedies Cumulative. . . . . . . . . . . . . . 54
     SECTION 6.11.       Delay or Omission Not Waiver. . . . . . . . . . . . . . . 54
     SECTION 6.12.       Control by Holders. . . . . . . . . . . . . . . . . . . . 54
     SECTION 6.13.       Waiver of Past Defaults.. . . . . . . . . . . . . . . . . 55
     SECTION 6.14.       Undertaking for Costs.. . . . . . . . . . . . . . . . . . 55
     SECTION 6.15.       Defaults Under First Mortgage Indenture or
                         Substituted Mortgage Indenture. . . . . . . . . . . . . . 55

ARTICLE VII      THE TRUSTEE . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
     SECTION 7.01.       Certain Duties and Responsibilities of the Trustee. . . . 56
     SECTION 7.02.       Notice of Defaults. . . . . . . . . . . . . . . . . . . . 56
     SECTION 7.03.       Certain Rights of Trustee.. . . . . . . . . . . . . . . . 56
     SECTION 7.04.       Not Responsible for Recitals or Issuance of
                         Securities. . . . . . . . . . . . . . . . . . . . . . . . 57
     SECTION 7.05.       May Hold Securities.. . . . . . . . . . . . . . . . . . . 58
     SECTION 7.06.       Money Held in Trust.. . . . . . . . . . . . . . . . . . . 58
     SECTION 7.07.       Compensation and Reimbursement. . . . . . . . . . . . . . 58
     SECTION 7.08.       Disqualification; Conflicting Interests.. . . . . . . . . 59
     SECTION 7.09.       Corporate Trustee Required; Eligibility.. . . . . . . . . 59

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                                                                                  PAGE
                                                                               
     SECTION 7.10.       Resignation and Removal; Appointment of
                         Successor.. . . . . . . . . . . . . . . . . . . . . . . . 59
     SECTION 7.11.       Acceptance of Appointment by Successor. . . . . . . . . . 61
     SECTION 7.12.       Merger, Conversion, Consolidation or Succession to
                         Business. . . . . . . . . . . . . . . . . . . . . . . . . 62
     SECTION 7.13.       Preferential Collection of Claims Against
                         Company.. . . . . . . . . . . . . . . . . . . . . . . . . 62
     SECTION 7.14.       Appointment of Authenticating Agent.. . . . . . . . . . . 62

ARTICLE VIII     HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY . . . . . . . . 65
     SECTION 8.01.       Company to Furnish Trustee Names and Addresses of
                         Holders . . . . . . . . . . . . . . . . . . . . . . . . . 65
     SECTION 8.02.       Preservation of Information; Communications to
                         Holders . . . . . . . . . . . . . . . . . . . . . . . . . 65
     SECTION 8.03.       Reports by Trustee. . . . . . . . . . . . . . . . . . . . 66
     SECTION 8.04.       Reports by Company. . . . . . . . . . . . . . . . . . . . 67

ARTICLE IX       CONSOLIDATION, MERGER, LEASE, SALE OR TRANSFER. . . . . . . . . . 68
     SECTION 9.01.       Then Company May Merge, Etc.. . . . . . . . . . . . . . . 68
     SECTION 9.02.       Opinion of Counsel. . . . . . . . . . . . . . . . . . . . 68
     SECTION 9.03.       Successor Corporation Substituted.. . . . . . . . . . . . 68

ARTICLE X        SUPPLEMENTAL INDENTURES . . . . . . . . . . . . . . . . . . . . . 70
     SECTION 10.01.      Supplemental Indentures Without Consent of Holders. . . . 70
     SECTION 10.02.      Supplemental Indentures with Consent of Holders.. . . . . 71
     SECTION 10.03.      Execution of Supplemental Indentures. . . . . . . . . . . 72
     SECTION 10.04.      Effect of Supplemental Indentures.. . . . . . . . . . . . 72
     SECTION 10.05.      Conformity with Trust Indenture Act.. . . . . . . . . . . 72
     SECTION 10.06.      Reference in Securities to Supplemental Indentures. . . . 73

ARTICLE XI       COVENANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
     SECTION 11.01.      Payments of Principal and Interest. . . . . . . . . . . . 74
     SECTION 11.02.      Maintenance of Office or Agency.. . . . . . . . . . . . . 74
     SECTION 11.03.      Corporate Existence.. . . . . . . . . . . . . . . . . . . 74
     SECTION 11.04.      Payment of Taxes and Other Claims.. . . . . . . . . . . . 75
     SECTION 11.05.      Maintenance of Properties.. . . . . . . . . . . . . . . . 75
     SECTION 11.06.      Opinions of Counsel.. . . . . . . . . . . . . . . . . . . 75
     SECTION 11.07.      Compliance Certificates.. . . . . . . . . . . . . . . . . 76
     SECTION 11.08.      Waiver of Stay or Extension.. . . . . . . . . . . . . . . 76
     SECTION 11.09.      Money for Securities Payments to Be Held in Trust.. . . . 77
     SECTION 11.10.      Restrictions on Liens.. . . . . . . . . . . . . . . . . . 78
     SECTION 11.11.      Restrictions on Sale and Lease-Back Transactions. . . . . 80

                                       -v-



                                                                                  PAGE
                                                                               
ARTICLE XII      REDEMPTION OF SECURITIES. . . . . . . . . . . . . . . . . . . . . 81
     SECTION 12.01.      Applicability of Article. . . . . . . . . . . . . . . . . 81
     SECTION 12.02.      Election to Redeem; Notice to Trustee.. . . . . . . . . . 81
     SECTION 12.03.      Election by Trustee of Securities to Be Redeemed. . . . . 81
     SECTION 12.04.      Notice of Redemption. . . . . . . . . . . . . . . . . . . 82
     SECTION 12.05.      Deposit of Redemption Price.. . . . . . . . . . . . . . . 82
     SECTION 12.06.      Securities Payable on Redemption Date.. . . . . . . . . . 83
     SECTION 12.07.      Securities Redeemed in Part.. . . . . . . . . . . . . . . 83

ARTICLE XIII     SINKING FUNDS . . . . . . . . . . . . . . . . . . . . . . . . . . 84
     SECTION 13.01.      Applicability of Article. . . . . . . . . . . . . . . . . 84
     SECTION 13.02.      Satisfaction of Sinking Fund Payments with
                         Securities. . . . . . . . . . . . . . . . . . . . . . . . 84
     SECTION 13.03.      Redemption of Securities for Sinking Fund.. . . . . . . . 84

ARTICLE XIV      DEFEASANCE AND COVENANT DEFEASANCE. . . . . . . . . . . . . . . . 85
     SECTION 14.01.      Applicability of Article; Company's Option to
                         Effect Defeasance or Covenant Defeasance. . . . . . . . . 85
     SECTION 14.02.      Defeasance and Discharge. . . . . . . . . . . . . . . . . 85
     SECTION 14.03.      Covenant Defeasance.. . . . . . . . . . . . . . . . . . . 85
     SECTION 14.04.      Conditions to Defeasance or Covenant Defeasance.. . . . . 86
     SECTION 14.05.      Deposited Money and Government Obligations To Be
                         Held In Trust . . . . . . . . . . . . . . . . . . . . . . 88

ARTICLE XV       MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . . . . . 89
     SECTION 15.01.      Miscellaneous.. . . . . . . . . . . . . . . . . . . . . . 89



                                       -vi-


                                       
                     WISCONSIN PUBLIC SERVICE CORPORATION

       Reconciliation and tie between Trust Indenture Act of 1939

                and Indenture, dated as of December 1, 1998



Trust Indenture
Act Section                                               Indenture Section
                                                        
 Section 310 (a) (1). . . . . . . . . . . . . . . . . . .      7.09
             (a) (2). . . . . . . . . . . . . . . . . . .      7.09
             (a) (3). . . . . . . . . . . . . . . . . . .      Not Applicable
             (a) (4). . . . . . . . . . . . . . . . . . .      Not Applicable
             (a) (5). . . . . . . . . . . . . . . . . . .      7.09
             (b). . . . . . . . . . . . . . . . . . . . .      7.08, 7.10
 Section 311 (a). . . . . . . . . . . . . . . . . . . . .      7.13
             (b). . . . . . . . . . . . . . . . . . . . .      7.13
 Section 312 (a). . . . . . . . . . . . . . . . . . . . .      8.01(a), 8.02(a)
             (b). . . . . . . . . . . . . . . . . . . . .      8.02(b)
             (c). . . . . . . . . . . . . . . . . . . . .      8.02(c)
 Section 313 (a). . . . . . . . . . . . . . . . . . . . .      8.03(a)
             (b). . . . . . . . . . . . . . . . . . . . .      8.03(b)
             (c). . . . . . . . . . . . . . . . . . . . .      8.03(a), 8.03(b)
             (d). . . . . . . . . . . . . . . . . . . . .      8.03(b)
 Section 314 (a). . . . . . . . . . . . . . . . . . . . .      8.04
             (b). . . . . . . . . . . . . . . . . . . . .      Not Applicable
             (c) (1). . . . . . . . . . . . . . . . . . .      1.02
             (c) (2). . . . . . . . . . . . . . . . . . .      1.02
             (c) (3). . . . . . . . . . . . . . . . . . .      Not Applicable
             (d). . . . . . . . . . . . . . . . . . . . .      4.10
             (e). . . . . . . . . . . . . . . . . . . . .      1.02
 Section 315 (a). . . . . . . . . . . . . . . . . . . . .      7.01(a)
             (b). . . . . . . . . . . . . . . . . . . . .      7.02
             (c). . . . . . . . . . . . . . . . . . . . .      7.01(b)
             (d). . . . . . . . . . . . . . . . . . . . .      7.01(c)
             (d) (1). . . . . . . . . . . . . . . . . . .      7.01(a), 7.01(c)
             (d) (2). . . . . . . . . . . . . . . . . . .      7.01(c)
             (d) (3). . . . . . . . . . . . . . . . . . .      7.01(c)
             (e). . . . . . . . . . . . . . . . . . . . .      6.14
 Section 316 (a) (1) (A). . . . . . . . . . . . . . . . .      6.12
             (a) (1) (B). . . . . . . . . . . . . . . . .      6.02, 6.13
             (a) (2). . . . . . . . . . . . . . . . . . .      Not Applicable
             (b). . . . . . . . . . . . . . . . . . . . .      6.08
 Section 317 (a) (1). . . . . . . . . . . . . . . . . . .      6.03
             (a) (2). . . . . . . . . . . . . . . . . . .      6.04
             (b). . . . . . . . . . . . . . . . . . . . .      11.09
 Section 318 (a). . . . . . . . . . . . . . . . . . . . .      1.07



- -----------------------
NOTE:  This reconciliation and tie shall not, for any purpose, be deemed to be a
part of this Indenture.

                                     -vii-


          INDENTURE, dated as of December 1, 1998, between WISCONSIN PUBLIC 
SERVICE CORPORATION, a corporation duly organized and existing under the laws 
of the State of Wisconsin (herein called the "COMPANY"), having its principal 
office at 700 North Adams Street, Green Bay, Wisconsin 54301 and Firstar Bank 
Milwaukee, N.A., National Association, a national banking association 
organized and existing under and by virtue of the laws of the United States, 
as Trustee (herein called the "TRUSTEE").

                               RECITALS OF THE COMPANY

          The Company has duly authorized the execution and delivery of this 
Indenture to provide for the issuance from time to time of its senior 
debentures, notes or other evidences of indebtedness (herein called the 
"SECURITIES"), to be issued in one or more series as in this Indenture 
provided.

          Subject to the provisions of Section 4.08 hereof, the Company may 
issue First Mortgage Bonds (as hereinafter defined) and issue and deliver 
Collateral Bonds to the Trustee to hold in trust for the benefit of the 
respective Holders (as hereinafter defined) from time to time of the Related 
Series of Securities.  Any payment by the Company of principal of, premium, 
if any, and interest on, a series of First Mortgage Bonds will be applied by 
the Trustee to satisfy the Company's obligations with respect to the 
principal of, premium, if any, and interest on, the Related Series of 
Securities.  Pursuant to the terms and provisions hereof, the Company may 
issue and deliver to the Trustee additional First Mortgage Bonds for such 
purpose or require the Trustee to deliver to the Company for cancellation any 
and all Collateral Bonds held by the Trustee.

          All things necessary to make this Indenture a valid agreement of 
the Company, in accordance with its terms, has been done.

          NOW, THEREFORE, THIS INDENTURE WITNESSETH:

          For and in consideration of the premises and the purchase of the 
Securities by the Holders thereof, it is mutually covenanted and agreed, for 
the equal and proportionate benefit of all Holders of the Securities or of 
series thereof, as follows: 

                                       


                                    ARTICLE I

                         DEFINITIONS AND OTHER PROVISIONS
                              OF GENERAL APPLICATION

          SECTION 1.01.   DEFINITIONS.

          For all purposes of this Indenture, except as otherwise expressly 
provided or unless the context otherwise requires:

          (1)     the terms defined in this Article have the meanings assigned
     to them in this Article and include the plural as well as the singular;

          (2)     all other terms used herein which are defined in the Trust
     Indenture Act, either directly or by reference therein, have the meanings
     assigned to them therein;

          (3)     all accounting terms not otherwise defined herein have the
     meanings assigned to them in accordance with GAAP;

          (4)     the word "INCLUDING" (and with correlative meaning "INCLUDE")
     means including, without limiting the generality of, any description
     preceding such term; and

          (5)     the words "HEREIN," "HEREOF" and "HEREUNDER" and other words
     of similar import refer to this Indenture as a whole and not to any
     particular Article, Section or other subdivision.

     Certain terms, used principally in Article Seven, are defined in that
     Article.

          (a)     "ACT," when used with respect to any Holder, has the 
meaning specified in Section 1.04.

          (b)     "AFFILIATE" of any specified Person means any other Person 
directly or indirectly controlling or controlled by or under direct or 
indirect common control with such specified Person.  For the purposes of this 
definition, "control" when used with respect to any specified Person means 
the power to direct the management and policies of such Person, directly or 
indirectly, whether through the ownership of voting securities, by contract 
or otherwise; and the terms "controlling" and "controlled" have meanings 
correlative to the foregoing.

          (c)     "AUTHENTICATING AGENT" means any Person authorized by the 
Trustee to act on behalf of the Trustee to authenticate Securities.

          (d)     "BANKRUPTCY LAW" means Title 11, U.S. Code or any similar 
federal or state law for the relief of debtors.

                                      -2-


          (e)     "BOARD OF DIRECTORS" means the board of directors of the 
Company; provided, however, that when the context refers to actions or 
resolutions of the Board of Directors, then the term "Board of Directors" 
shall also mean any duly authorized committee of the Board of Directors of 
the Company or Officer authorized to act with respect to any particular 
matter to exercise the power of the Board of Directors of the Company.

          (f)     "BOARD RESOLUTION" means a copy of a resolution certified 
by the Secretary or an Assistant Secretary of the Company to have been duly 
adopted by the Board of Directors and to be in full force and effect on the 
date of such certification, and delivered to the Trustee.

          (g)     "BONDHOLDER" shall mean the Person in whose name a First 
Mortgage Bond is registered in the bond register therefor.

          (h)     "BUSINESS DAY," when used with respect to any Place of 
Payment, means each Monday, Tuesday, Wednesday, Thursday and Friday which is 
not a day on which banking institutions in that Place of Payment are 
authorized or obligated by law or regulation to close.

          (i)      "CAPITAL LEASE" shall mean any lease which has been or 
would be capitalized on the books of the lessee in accordance with GAAP.

          (j)     "CAPITALIZATION" shall mean the total of all the following 
items appearing on, or included in, the consolidated balance sheet of the 
Company:  (i) liabilities for indebtedness maturing more than twelve (12) 
months from the date of determination; and (ii) common stock, preferred 
stock, Hybrid Preferred Securities, premium on capital stock, capital 
surplus, capital in excess of par value, and retained earnings (however the 
foregoing may be designated), less, to the extent not otherwise deducted, the 
cost of shares of capital stock of the Company held in its treasury.  Subject 
to the foregoing, Capitalization shall be determined in accordance with 
generally accepted accounting principles and practices applicable to the type 
of business in which the Company is engaged and that are approved by 
independent accountants regularly retained by the Company, and may be 
determined as of a date nor more than sixty (60) days prior to the happening 
of an event for which such determination is being made.

          (k)     "COLLATERAL BONDS," shall mean any First Mortgage Bonds 
issued by the Company under the First Mortgage Indenture and issued and 
delivered to the Trustee pursuant to Section 4.01.

          (l)     "COMMISSION" means the Securities and Exchange Commission, 
as from time to time constituted, created under the Exchange Act, or, if at 
any time after the execution of this instrument such Commission is not 
existing and performing the duties now assigned to it under the Trust 
Indenture Act, then the body performing such duties at such time.

                                      -3-


          (m)     "COMPANY" means the Person named as the "Company" in the 
first paragraph of this Indenture until a successor corporation shall have 
become such pursuant to the applicable provisions of this Indenture, and 
thereafter "Company" shall mean such successor corporation.

          (n)     "COMPANY REQUEST" or "COMPANY ORDER" means a written 
request or order signed in the name of the Company by its Chairman of the 
Board, its President or a Vice President, and by its Treasurer, an Assistant 
Treasurer, its Controller, an Assistant Controller, its Secretary or an 
Assistant Secretary, and delivered to the Trustee.

          (o)     "CORPORATE TRUST OFFICE" means the principal office of the 
Trustee at which at any time its corporate trust business shall be 
administered, which office at the date hereof is located at 1555 North 
RiverCenter Drive, Suite 301, P.O. Box 2077, Milwaukee, Wisconsin 53201-2077, 
Attention:  Corporate Trust Department, or such other address as the Trustee 
may designate from time to time by notice to the Holders and the Company, or 
the principal corporate trust office of any successor Trustee (or such other 
address as a successor Trustee may designate from time to time by notice to 
the Holders and the Company).

          (p)     "COVENANT DEFEASANCE" has the meaning specified in Section 
14.03.

          (q)     "CUSTODIAN" means any receiver, trustee, assignee, 
liquidator, sequestrator or similar official under any Bankruptcy Law.

          (r)     "DEBT" means any outstanding debt for money borrowed 
evidenced by notes, debentures, bonds or other securities or guarantees of 
any thereof.

          (s)     "DEFAULT" means any event which is, or after notice or 
passage of time or both would be, an Event of Default.

          (t)     "DEFAULTED INTEREST" has the meaning specified in Section 
3.07.

          (u)     "DEFEASANCE" has the meaning specified in Section 14.02.

          (v)     "DEPOSITARY" shall mean, unless otherwise specified 
pursuant to Section 3.01 hereof, The Depository Trust Company, New York, New 
York, or any successor thereto registered or qualified as a clearing agency 
under the Securities Exchange Act of 1934, or other applicable statute or 
regulation.

          (w)     "DOLLARS" and "$" means lawful money of the United States 
of America.

          (x)     "EVENT OF DEFAULT" has the meaning specified in Section 
6.01.

                                      -4-


          (y)     "EXCHANGE ACT" means the Securities and Exchange Act of 
1934, as amended from time to time, and the rules and regulations promulgated 
thereunder.

          (z)     "EXPERT" shall mean any officer of the Company familiar 
with the terms of the First Mortgage Indenture and this Indenture, any law 
firm, any investment banking firm or any other Person satisfactory in the 
reasonable judgment of the Trustee.

          (aa)    "FIRST MORTGAGE BONDS" shall mean all First Mortgage Bonds 
issued by the Company and outstanding under the First Mortgage Indenture or 
the Substituted Mortgage Indenture, including in all events any Collateral 
Bonds or Substituted Collateral Bonds issued and delivered to and held by the 
Trustee.

          (bb)    "FIRST MORTGAGE INDENTURE" shall mean the First Mortgage 
and Deed of Trust dated January 1, 1941, to First Wisconsin Trust Company 
(succeeded by Firstar Bank Milwaukee, N.A., National Association), Milwaukee, 
Wisconsin, as supplemented and amended by the supplemental indentures thereto.

          (cc)    "GAAP" shall mean generally accepted accounting principles 
in the United States of America as in effect on the date hereof, applied on a 
basis consistent with those used in the preparation of any financial 
statements referred to herein, unless otherwise stated herein.

          (dd)    "GLOBAL SECURITY" shall mean a Security that, pursuant to 
Sections 3.01 and 3.03 hereof, is issued to evidence Securities, that is 
delivered to the Depositary or pursuant to the instructions of the Depositary 
and that shall be registered in the name of the Depositary or its nominee.

          (ee)    "HOLDER" or "SECURITY HOLDER" means a Person in whose name 
a Security is registered in the Security Register.

          (ff)    "HYBRID PREFERRED SECURITIES" shall mean any preferred 
securities issued by a Hybrid Preferred Securities Subsidiary, where such 
preferred securities have the following characteristics:

          (i)     such Hybrid Preferred Securities Subsidiary lends
     substantially all of the proceeds from the issuance of such preferred
     securities to the Company in exchange for Junior Subordinated Indebtedness
     issued by the Company;

          (ii)    such preferred securities contain terms providing for the
     deferral of interest payments corresponding to provisions providing for the
     deferral of interest payments on the Junior Subordinated Indebtedness; and

          (iii)   the Company makes period interest payments on the Junior
     Subordinated Indebtedness, which interest payments are in turn used by the
     Hybrid Preferred Securities Subsidiary to make corresponding payments to
     the holders of the preferred securities.

                                      -5-



          (gg)    "HYBRID PREFERRED SECURITIES SUBSIDIARY" shall mean any 
business trust (or similar entity) (i) all of the common equity interest of 
which is owned (either directly or indirectly through one or more 
wholly-owned Subsidiaries of the Company or any Consolidated Subsidiary of 
the Company) at all times by the Company, (ii) that has been formed for the 
purpose of issuing Hybrid Preferred Securities and (iii) substantially all of 
the assets of which consist at all times solely of Junior Subordinated 
Indebtedness issued by the Company and payments made from time to time on 
such Junior Subordinated Indebtedness.

          (hh)     "INDENTURE" means this instrument as originally executed 
or as it may from time to time be supplemented or amended by one or more 
indentures supplemental hereto entered into pursuant to the applicable 
provisions hereof and shall include the terms of particular series of 
Securities established as contemplated by Section 3.01.

          (ii)    "INITIAL SECURITIES" shall mean Securities in an aggregate 
principal amount of $50,000,000 authenticated and delivered upon the 
execution of this Indenture.

          (jj)    "INTEREST," when used with respect to an Original Issue 
Discount Security which by its terms bears interest only after Maturity, 
means interest payable after Maturity.

          (kk)    "INTEREST PAYMENT DATE," when used with respect to any 
Security, means the Stated Maturity of an installment of interest on such 
Security.

          (ll)    "JUNIOR SUBORDINATED INDEBTEDNESS" shall mean any unsecured 
Debt of the Company (i) issued in exchange for the proceeds of Hybrid 
Preferred Securities and (ii) subordinated to the rights of the Holders 
hereunder.

          (mm)    "LIEN," means any lien (statutory or other), mortgage, 
pledge, hypothecation, assignment, deposit arrangement, encumbrance or 
preference, priority or other security agreement or preferential arrangement 
of any kind or nature whatsoever (including, without limitation, the interest 
of a vendor or lessor under any conditional sale, capitalized lease or other 
title retention agreement).

          (nn)    "MATURITY," when used with respect to any Security, means 
the date on which the principal of such Security or an installment of 
principal becomes due and payable as therein or herein provided, whether at 
the Stated Maturity or by declaration of acceleration, call for redemption or 
otherwise.

          (oo)    "MORTGAGE," shall mean and include any mortgage, pledge, 
lien or security interest.

          (pp)    "MORTGAGE TRUSTEE," shall mean the Person serving as 
trustee at the time under the First Mortgage Indenture.

          (qq)    "NET TANGIBLE ASSETS" shall mean the amount shown as total 
assets on the consolidated balance sheet of the Company, less the following: 
(i) intangible 

                                      -6-


assets including, but without limitation, such items as goodwill, trademarks, 
trade names, patents, and unamortized debt discount and expense and (ii) 
appropriate adjustments, if any, on account of minority interests.  Net 
Tangible Assets shall be determined in accordance with generally accepted 
accounting principles and practices applicable to the type of business in 
which the Company is engaged and that are approved by the independent 
accountants regularly retained by the Company, and may be determined as of a 
date not more than sixty (60) days prior to the happening of the event for 
which such determination is being made.

          (rr)    "OFFICER" means the Chairman of the Board, the 
Vice-Chairman of the Board, the President, any Vice President, the Treasurer, 
any Assistant Treasurer, the Controller, the Secretary or any Assistant 
Secretary of the Company.

          (ss)    "OFFICER'S CERTIFICATE" means a certificate signed by an 
Officer and delivered to the Trustee.

          (tt)    "OPERATING PROPERTY" shall mean (i) any interest in real 
property owned by the Company and (ii) any asset owned by the Company that is 
depreciable in accordance with GAAP, excluding, in either case, any interest 
of the Company as lessee under a Capital Lease (except for a lease that 
results from a Sale and Lease-Back Transaction).

          (uu)    "OPINION OF COUNSEL" means a written opinion of counsel, 
who may be an employee of or counsel for the Company, and who shall be 
reasonably acceptable to the Trustee.

          (vv)    "ORIGINAL ISSUE DISCOUNT SECURITY" means any Security, 
which provides for an amount less than the principal amount thereof to be due 
and payable upon a declaration of acceleration of the Maturity thereof 
pursuant to Section 6.02.

          (ww)    "OUTSTANDING," when used with respect to Securities or 
Securities of any series, means, as of the date of determination, all such 
Securities theretofore authenticated and delivered under this Indenture, 
except:

          (i)   Securities theretofore cancelled by the Trustee or delivered 
     to the Trustee for cancellation;

          (ii)  Securities, or portions thereof, for whose payment or 
     redemption money in the necessary amount has been theretofore deposited 
     with the Trustee or any Paying Agent (other than the Company) in trust 
     or set aside and segregated in trust by the Company (if the Company 
     shall act as its own Paying Agent) for the Holders of such Securities; 
     provided that, if such Securities are to be redeemed, notice of such 
     redemption has been duly given pursuant to this Indenture or provision 
     therefor satisfactory to the Trustee has been made;

          (iii) Securities which have been paid pursuant to Section 3.06 or 
     in exchange for or in lieu of which other Securities have been 
     authenticated and delivered pursuant to this Indenture, other than any 
     such Securities in respect of which there shall have 

                                     -7-


     been presented to the Trustee proof satisfactory to it that such 
     Securities are held by a bona fide purchaser in whose hands such 
     Securities are valid obligations of the Company; and

          (iv)  Securities which have been defeased pursuant to Section 14.02;

provided, however, that in determining whether the Holders of the requisite 
principal amount of the Outstanding Securities have given any request, 
demand, authorization, direction, notice, consent or waiver hereunder, (a) 
the principal amount of an Original Issue Discount Security that shall be 
deemed to be Outstanding for such purposes shall be that portion of the 
principal amount thereof that could be declared to be due and payable upon 
the occurrence of an Event of Default and the continuation thereof pursuant 
to the terms of such Original Issue Discount Security as of the date of such 
determination and (b) Securities owned by the Company or any other obligor 
upon the Securities or any Affiliate of the Company or of such other obligor 
shall be disregarded and deemed not to be Outstanding, except that, in 
determining whether the Trustee shall be protected in relying upon any such 
request, demand, authorization, direction, notice, consent or waiver, only 
Securities which the Trustee knows to be so owned shall be so disregarded.  
Securities so owned which have been pledged in good faith may be regarded as 
Outstanding if the pledge establishes to the satisfaction of the Trustee the 
pledge's right so to act with respect to such Securities and that the pledgee 
is not the Company or any other obligor upon the Securities or any Affiliate 
of the Company or of such other obligor.

          (xx)    "PAYING AGENT" means any Person authorized by the Company 
to pay the principal of (and premium, if any) or interest on any Securities 
on behalf of the Company.  The Company may act as Paying Agent with respect 
to any Securities issued hereunder.

          (yy)    "PERSON" means any individual, corporation, partnership, 
joint venture, association, joint-stock company, trust, unincorporated 
organization or government or any agency or political subdivision thereof.

          (zz)    "PLACE OF PAYMENT," when used with respect to the 
Securities of any series, means the place or places where the principal of 
(and premium, if any) and interest on the Securities of that series are 
payable as specified as contemplated by Section 3.01.

          (aaa)    "REDEMPTION DATE," when used with respect to any Security 
of any series to be redeemed, means the date fixed for such redemption by or 
pursuant to this Indenture.

          (bbb)   "REDEMPTION PRICE," when used with respect to any Security 
of any series to be redeemed, means the price at which it is to be redeemed 
pursuant to this Indenture.

          (ccc)   "REGULAR RECORD DATE" for the interest payable on any 
Interest Payment Date on the Securities of any series means the date 
specified for that purpose as contemplated by Section 3.01.

                                      -8-


          (ddd)   "RELATED SERIES OF COLLATERAL BONDS" shall mean, when used 
in reference to a series of Securities, the series of Collateral Bonds, 
having the same stated rate or rates of interest (or interest calculated in 
the same manner), Interest Payment Dates, stated maturity date and redemption 
provisions, and in the same aggregate principal amount, delivered to the 
Trustee pursuant to Section 4.01 in connection with the initial 
authentication and issuance of such Securities pursuant to Section 3.03.

          (eee)   "RELATED SERIES OF SECURITIES" shall mean, when used in 
reference to a series of Collateral Bonds or Substituted Collateral Bonds, 
the series of Securities in respect of which such series of Collateral Bonds 
or Substituted Collateral Bonds was delivered to the Trustee pursuant to 
Section 4.01 or 4.09 hereof upon the initial issuance and authentication of 
such series of Securities pursuant to Section 3.03 hereof.

          (fff)   "RELATED SERIES OF SUBSTITUTED COLLATERAL BONDS" shall 
mean, when used in reference to a series of Securities, the series of 
Substituted Collateral Bonds, having the same stated rate or rates of 
interest (or interest calculated in the same manner), Interest Payment Dates, 
stated maturity date and redemption provisions, and in the same aggregate 
principal amount, delivered to the Trustee pursuant to Section 4.09.

          (ggg)   "RELEASE DATE" shall mean the date as of which all First 
Mortgage Bonds, other than Collateral Bonds, have been retired through 
payment, redemption, or otherwise (including those First Mortgage Bonds the 
payment for which has been provided for in accordance with the First Mortgage 
Indenture) at, before or after the maturity thereof, provided that no Default 
or Event of Default has occurred and is continuing.

          (hhh)   "RESPONSIBLE OFFICER," when used with respect to the 
Trustee, means any vice president, any assistant vice president, the 
secretary, any assistant secretary, the treasurer, any assistant treasurer, 
the cashier, any assistant cashier, any senior trust officer, any trust 
officer or assistant trust officer, the controller or any assistant 
controller or any other officer of the Trustee customarily performing 
functions similar to those performed by any of the above designated officers 
and also means, with respect to a particular corporate trust matter, any 
other officer to whom such matter is referred because of his knowledge of and 
familiarity with the particular subject.

          (iii)   "SALE AND LEASE-BACK TRANSACTION" shall mean any 
arrangement with any Person providing for the leasing to the Company of any 
Operating Property (except for leases for a term, including any renewal 
thereof, of not more than forty-eight (48) months), which Operating Property 
has been or is to be sold or transferred by the Company to such Person; 
PROVIDED, HOWEVER, Sale and Lease-Back Transaction shall not include any 
arrangement first entered into prior to the date of this Indenture and shall 
not include any transaction pursuant to which the Company sells Operating 
Property to, and thereafter purchases energy or services from, any entity 
which transaction is ordered or authorized by any regulatory authority having 
jurisdiction over the Company or its operations or is entered into pursuant 
to any plan or program of industry restructuring ordered or authorized by any 
such regulatory authority.

                                      -9-


          (jjj)   "SECURITIES" has the meaning stated in the first recital of 
this Indenture and more particularly means any Securities authenticated and 
delivered under this Indenture.

          (kkk)   "SECURITY REGISTER" and "SECURITY REGISTRAR" have the 
respective meanings specified in Section 3.05.

          (lll)   "SPECIAL RECORD DATE" for the payment of any Defaulted 
Interest means a date fixed by the Trustee pursuant to Section 3.07.

          (mmm)   "STATED MATURITY," when used with respect to any Security 
or any installment of principal thereof or interest thereon, means the date 
specified in such Security as the fixed date on which the principal of such 
Security or such installment of principal or interest is due and payable.

          (nnn)   "SUBSIDIARY" of a Person means (i) any corporation of which 
more than 50% of the outstanding securities having ordinary voting power 
shall at the time be owned or controlled, directly or indirectly, by such 
Person or by one or more of its Subsidiaries or by such Person and one or 
more of its Subsidiaries, or (ii) any partnership, association, joint venture 
or similar business organization of which more than 50% of the ownership 
interests having ordinary voting power shall at the time be so owned or 
controlled.  Unless otherwise expressly provided, all references herein to a 
"Subsidiary" shall mean a Subsidiary of the Company.

          (ooo)   "SUBSTITUTED COLLATERAL BONDS," shall mean any mortgage 
bonds issued by the Company under a Substituted Mortgage Indenture and 
delivered to the Trustee pursuant to Section 4.09 hereof.

          (ppp)   "SUBSTITUTED MORTGAGE INDENTURE" shall mean a mortgage 
indenture of the Company designated by the Company to the Trustee as a 
Substituted Mortgage Indenture pursuant to Section 4.09.

          (qqq)   "TRUST INDENTURE ACT" means the Trust Indenture Act of 
1939, as amended, as in force at the date as of which this Indenture was 
executed; provided, however, that in the event that such Act is amended after 
such date, "TRUST INDENTURE ACT" means the Trust Indenture Act of 1939 as so 
amended.

          (rrr)   "TRUSTEE" means the Person named as the "Trustee" in the 
first paragraph of this instrument until a successor Trustee shall have 
become such pursuant to the applicable provisions of this Indenture, and 
thereafter "Trustee" shall mean or include each Person who is then a Trustee 
hereunder, and if at any time there is more than one such Person, "Trustee" 
as used with respect to the Securities of any series shall mean the Trustee 
with respect to Securities of that series.

          (sss)    "U.S. GOVERNMENT OBLIGATIONS" means securities which are 
(i) direct obligations of the United States of America for the payment of 
which its full faith and 

                                     -10-


credit is pledged or (ii) obligations of a Person controlled or supervised by 
and acting as an agency or instrumentality of the United States of America 
the timely payment of which is unconditionally guaranteed by the full faith 
and credit of the United States of America which, in either case, are not 
callable or redeemable at the option of the issuer thereof or otherwise 
subject to prepayment, and shall also include a depository receipt issued by 
a New York Clearing House bank or trust company as custodian with respect to 
any such U.S. Government Obligation or a specific payment or interest on or 
principal of any such U.S. Government Obligation held by such custodian for 
the account of the holder of a depository receipt, provided that (except as 
required by law) such custodian is not authorized to make any deduction from 
the amount payable to the holder of such depository receipt or from any 
amount held by the custodian in respect of the U.S. Government Obligation or 
the specific payment of interest on or principal of the U.S. Government 
Obligation evidenced by such depository receipt.

          (ttt)   "VALUE" shall mean, with respect to a Sale and Lease-Back 
Transaction, as of any particular time, the amount equal to the greater of 
(i) the net proceeds to the Company from the sale or transfer of the property 
leased pursuant to such Sale and Lease-Back Transaction or (ii) the net book 
value of such property, as determined in accordance with generally accepted 
accounting principles by the Company at the time of entering into such Sale 
and Lease-Back transaction, in either case multiplied by a fraction, the 
numerator of which shall be equal to the number of full years of the term of 
the lease that is part of such Sale and Lease-Back Transaction remaining at 
the time of determination and the denominator of which shall be equal to the 
number of full years of such term, without regard to any renewal or extension 
options contained in such lease.

          (uuu)   "VICE PRESIDENT," when used with respect to the Company or 
the Trustee, means any vice president, whether or not designated by a number 
or a word or words added before or after the title "vice president".

          SECTION 1.02.   COMPLIANCE CERTIFICATES AND OPINIONS.

          Upon any application or request by the Company to the Trustee to 
take any action under any provision of this Indenture, other than as action 
permitted by Sections 2.05 and 8.04, the Company shall furnish to the Trustee 
an Officer's Certificate stating that all conditions precedent, if any, 
provided for in this Indenture relating to the proposed action have been 
complied with and an Opinion of Counsel stating that in the opinion of such 
counsel all such conditions precedent, if any, have been complied with, 
except that in the case of any such application or request as to which the 
furnishing of such documents is specifically required by any provision of 
this Indenture relating to such particular application or request, no 
additional certificate or opinion need be furnished.

          Every certificate or opinion with respect to compliance with a 
condition or covenant provided for in this Indenture shall include:

                                     -11-


          (a)     a statement that each individual signing such certificate 
or opinion has read such covenant or condition and the definitions herein 
relating thereto;

          (b)     a brief statement as to the nature and scope of the 
examination or investigation upon which the statements or opinions contained 
in such certificate or opinion are based;

          (c)     a statement that, in the opinion of each such individual, 
he has made such examination or investigation as is necessary to enable him 
to express an informed opinion as to whether or not such covenant or 
condition has been complied with; and

          (d)     a statement as to whether, in the opinion or each such 
individual, such condition or covenant has been complied with.

          SECTION 1.03.   FORM OF DOCUMENTS DELIVERED TO TRUSTEE.

          In any case where several matters are required to be certified by, 
or covered by a opinion of, any specified Person, it is not necessary that 
all such matters be certified by, or covered by the opinion of, only one such 
Person, or that they be so certified or covered by only one document, but one 
such Person may certify or give an opinion with respect to some matters and 
one or more other such Persons as to other matters, and any such Person may 
certify or give an opinion as to such matters in one or several documents.

Any certificate or opinion of an Officer may be based, insofar as it relates 
to legal matters, upon a certificate or opinion of, or representations by, 
counsel, unless such Officer knows, or in the exercise of reasonable care 
should know, that the certificate or Opinion of Counsel may be based, insofar 
as it relates to factual matters, upon a certificate or opinion of, or 
representations by, an Officer or Officers of the Company stating that the 
information with respect to such factual matters is in the possession of the 
Company, unless such counsel knows, or in the exercise of reasonable care 
should know, that the certificate or opinion or representations with respect 
to such matters are erroneous.

          Where any Person is required to make, give or execute two or more 
applications, requests, consents, certificates, statements, opinions or other 
instruments under this Indenture, they may, but need not, be consolidated and 
form one instrument.

          SECTION 1.04.   ACTS OF HOLDERS.

          (a)     Any request, demand, authorization, direction, notice, 
consent, waiver or other action provided by this Indenture to be given or 
taken by Holders may be embodied in and evidenced by one or more instruments 
of substantially similar tenor signed by such Holders in person or by agents 
duly appointed in writing; and, except as herein otherwise expressly 
provided, such action shall become effective when such instrument or 
instruments are delivered to the Trustee and, where it is hereby expressly 
required, to the Company.  Such instrument or instruments (and the action 
embodied therein and evidenced thereby) are herein sometimes referred to as 
the "ACT" of the Holders signing such instrument or instruments.  

                                      -12-


Proof of execution of any such instrument or of a writing appointing any such 
agent shall be sufficient for any purpose of this Indenture and (subject to 
Section 6.01) conclusive in favor of the Trustee and the Company, if made in 
the manner provided in this Section.

          (b)     The fact and date of the execution by any Person of any 
such instrument or writing may be proved by the affidavit of a witness of 
such execution or by a certificate of a notary public or other officer 
authorized by law to take acknowledgments of deeds, certifying that the 
individual signing such instrument or writing acknowledged to him the 
execution thereof.  Where such execution is by a signer acting in a capacity 
other than his individual capacity, such certificate or affidavit shall also 
constitute sufficient proof of his authority.  The fact and date of the 
execution of any such instrument or writing, or the authority of the Person 
executing the same, may also be proved in any other manner, which the Trustee 
deems sufficient.

          (c)     The ownership of Registered Securities shall be proved by 
the Security Register.

          (d)     Any request, demand, authorization, direction, notice, 
consent, waiver or other Act of the Holder of any Security shall bind every 
future Holder of the same Security and the Holder of every Security issued 
upon the registration of transfer thereof or in exchange therefor or in lieu 
thereof in respect of anything done, omitted or suffered to be done by the 
Trustee or the Company in reliance thereon, whether or not notation of such 
action is made upon such Security.

          (e)     If the Company shall solicit from the Holders any request, 
demand, authorization, direction, notice, consent, waiver or other Act, the 
Company may, at its option, by or pursuant to a Board Resolution, fix in 
advance a record date for the determination of Holders entitled to give such 
request, demand, authorization, direction, notice, consent, waiver or other 
Act, but the Company shall have no obligation to do so.  If such a record 
date is fixed, such request, demand, authorization, direction, notice, 
consent, waiver or other Act may be given before or after such record date, 
but only the Holders of record at the close of business on such record date 
shall be deemed to be Holders for the purposes of determining whether Holders 
of the requisite proportion of Outstanding Securities have authorized or 
agreed or consented to such request, demand, authorization, direction, 
notice, consent, waiver or other Act, and for that purpose the Outstanding 
Securities shall be computed as of such record date; provided that no such 
authorization, agreement or consent by the Holders on such record date shall 
be deemed effective unless it shall become effective pursuant to the 
provisions of this Indenture not later than six months after the record date.

          SECTION 1.05.   NOTICES, ETC., TO TRUSTEE AND COMPANY.

          Any request, demand, authorization, direction, notice, consent, 
waiver or Act of Holders or other document provided or permitted by this 
Indenture to be made upon, given or furnished to, or filed with,

                                     -13-



          (i)     the Trustee by any Holder or by the Company shall be
     sufficient for every purpose hereunder if made, given, furnished or filed
     in writing to or with the Trustee and received by the Trustee at its
     Corporate Trust Office, Attention: Corporate Trust Department or

          (ii)    the Company by the Trustee or by any Holder shall be
     sufficient for every purpose hereunder (unless otherwise herein expressly
     provided) if in writing and mailed, first-class postage prepaid, to the
     Company addressed to it at the address of its principal office specified in
     the first paragraph of this Indenture, attention:  Secretary, or at any
     other address previously furnished in writing to the Trustee by the
     Company.

          SECTION 1.06.   NOTICE TO HOLDERS; WAIVER.

          Where this Indenture or any Security provides for notice to Holders 
of any event, such notice shall be deemed sufficiently given (unless 
otherwise herein or in such Security expressly provided) if in writing and 
mailed, first-class postage prepaid, to each Holder affected by such event, 
at his address as it appears in the Security Register, not later than the 
latest date, and not earlier than the earliest date, prescribed for the 
giving of such notice.  In any case where notice to Holders is given by mail, 
neither the failure to mail such notice, nor any defect in any notice so 
mailed, to any particular Holder shall affect the sufficiency of such notice 
with respect to other Holders or the validity of the proceedings to which 
such notice relates.  Where this Indenture or any Security provides for 
notice in any manner, such notice may be waived in writing by the Person 
entitled to receive such notice, either before or after the event, and such 
waiver shall be the equivalent of such notice.  Waivers of notice by Holders 
shall be filed with the Trustee, but such filing shall not be a condition 
precedent to the validity of any action taken in reliance upon such waiver.

          In case by reason of the suspension of regular mail service or by 
reason of any other cause it shall be impracticable to give such notice by 
mail, then such notification as shall be made with the approval of the 
Trustee shall constitute a sufficient notification for every purpose 
hereunder.

          Any request, demand, authorization, direction, notice, consent or 
waiver required or permitted under this Indenture shall be in the English 
language, except that any published notice may be in an official language of 
the country of publication.

          SECTION 1.07.   CONFLICT WITH TRUST INDENTURE ACT.

          If any provision hereof limits, qualifies or conflicts with another 
provision hereof which is required to be included in this Indenture by any of 
the provisions of the Trust Indenture Act, such required provision shall 
control.  If any provision of this Indenture modifies or excludes any 
provision of the Trust Indenture Act that may be so modified or excluded, the 
latter provision shall be deemed to apply to this Indenture as so modified or 
shall be excluded, as the case may be.

                                     -14-


          SECTION 1.08.   EFFECT OF HEADINGS AND TABLE OF CONTENTS.

          The Article and Section headings herein and the Table of Contents 
are for convenience only and shall not affect the construction hereof.

          SECTION 1.09.   SUCCESSORS AND ASSIGNS.

          All covenants and agreements in this Indenture by the Company shall 
bind its successors and assigns, whether so expressed or not.

          SECTION 1.10.   SEPARABILITY CLAUSE.

          In case any provision in this Indenture or in the Securities shall 
be invalid, illegal or unenforceable, the validity, legality and 
enforceability of the remaining provisions shall not in any way be affected 
or impaired thereby.

          SECTION 1.11.   BENEFITS OF INDENTURE.

          Nothing in this Indenture or in the Securities, express or implied, 
shall give to any Person, other than the parties hereto and their successors 
hereunder and the Holders, any benefit or any legal or equitable right, 
remedy or claim under this Indenture.

          SECTION 1.12.   GOVERNING LAW.

          This Indenture and the Securities shall be governed by and 
construed in accordance with the laws (other than the choice of law 
provisions) of the State of Wisconsin.

          SECTION 1.13.   LEGAL HOLIDAYS.

          In any case where any Interest Payment Date, Redemption Date or 
Stated Maturity of any Security shall not be a Business Day at any Place of 
Payment, then (notwithstanding any other provision of this Indenture or of 
the Securities) payment of interest or principal (and premium, if any) need 
not be made at such Place of Payment on such date, but may be made on the 
next succeeding Business Day or on such other day as may be set out in the 
Officer's Certificate pursuant to Section 3.01 at such Place of Payment with 
the same force and effect as if made on the Interest Payment Date or 
Redemption Date, or at the Stated Maturity, provided that no interest shall 
accrue for the period from and after such Interest Payment Date, Redemption 
Date or Stated Maturity, as the case may be.

          SECTION 1.14.   NO RECOURSE AGAINST OTHERS.

          A director, officer, employee or stockholder, as such, of the 
Company shall not have any liability for any obligations of the Company under 
the Securities or this Indenture or for any claim based on, in respect of or 
by reason of such obligations or their creation.  Each Securityholder, by 
accepting a Security, waives and, releases all such liability.  Such waivers 
and releases are part of the consideration for the issuance of the Securities.

                                     -15-






                                     -16-

                                       
                                   ARTICLE II

                                 SECURITY FORMS

SECTION 2.01.     FORMS GENERALLY.

          The Securities of each series shall be in substantially the form 
set forth in this Article, or in such other form as shall be established by 
or pursuant to a Board Resolution or in one or more indentures supplemental 
hereto, in each case with such appropriate insertions, omissions, 
substitutions and other variations as are required or permitted by this 
Indenture, and may have such letters, numbers or other marks of 
identification and such legends or endorsements placed thereon as may be 
required to comply with the rules of any securities exchange or as may, 
consistently herewith, be determined by the Officers executing such 
Securities, as evidenced by their execution of the Securities.  If the form 
of Securities of any series is established by action taken pursuant to a 
Board Resolution, a copy of an appropriate record of such action shall be 
certified by the Secretary or an Assistant Secretary of the Company and 
delivered to the Trustee at or prior to the delivery of the Company Order 
contemplated by Section 3.03 for the authentication and delivery of such 
Securities.

          The Trustee's certificates of authentication shall be in 
substantially the form set forth in this Article.

          The definitive Securities shall be photocopied, printed, 
lithographed or engraved on steel engraved borders or may be produced in any 
other manner, all as determined by the Officers executing such Securities, as 
evidenced by their execution of such Securities.

          SECTION 2.02.   FORM OF FACE OF SECURITY.

          [If the Security is an Original Issue Discount Security, insert--FOR
PURPOSES OF SECTION 1272 OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE
"CODE"), THE AMOUNT OF ORIGINAL ISSUE DISCOUNT (AS DEFINED IN SECTION 1273(a)(1)
OF THE CODE AND TREASURY REGULATION SECTION 1.1273-1(a) WITH RESPECT TO THIS
SECURITY IS _______, THE ISSUE PRICE (AS DEFINED IN TREASURY REGULATION SECTION
1.1273-2) OF THIS SECURITY IS __________, THE ISSUE DATE (AS DEFINED IN SECTION
1275(a)(2) OF THE CODE AND TREASURY REGULATION SECTION 1.1273-2) OF THIS
SECURITY IS _______ AND THE YIELD TO MATURITY OF THIS SECURITY IS ___________.]

                                     -17-


                                       
                       WISCONSIN PUBLIC SERVICE CORPORATION

                             ---------------------

No. _________                                                   [$] _________

          WISCONSIN PUBLIC SERVICE CORPORATION, a corporation duly organized 
and existing under the laws of Wisconsin (herein called the "Company," which 
term includes any successor corporation under the Indenture hereinafter 
referred to), for value received, hereby promises to pay to ____________, or 
registered assigns, the principal sum of ___________ Dollars on 
___________________ [If the Security is to bear interest prior to Maturity, 
insert--, and to pay interest thereon from _______________ or from the most 
recent Interest Payment Date to which interest has been paid or duly provided 
for, [semi-annually] [quarterly] [monthly] [on _______ and ________] in each 
year, commencing ______________, at the rate of _____% per annum, until the 
principal hereof is paid or made available for payment [If applicable insert--, 
and (to the extent that the payment of such interest shall be legally 
enforceable) at the rate of _____% per annum on any overdue principal and 
premium and on any overdue installment of interest].  The interest so payable, 
and punctually paid or duly provided for, on any Interest Payment Date will, 
as provided in such Indenture, be paid to the Person in whose name this 
Security (or one or more Predecessor Securities) is registered at the close 
of business on the Regular Record Date for such interest, which shall be the 
_____ of _____ (whether or not a Business Day), as the case may be, next 
preceding such Interest Payment Date. Any such interest not so punctually 
paid or duly provided for will forthwith cease to be payable to the Holder on 
such Regular Record Date and may either be paid to the Person in whose name 
this Security (or one or more Predecessor Securities) is registered at the 
close of business on a Special Record Date for the payment of such Defaulted 
Interest to be fixed by the Trustee, notice whereof shall be given to Holders 
of Securities of this series not less than 10 days prior to such Special 
Record Date, or be paid at any time in any other lawful manner not 
inconsistent with the requirements of any securities exchange on which the 
Securities of this series may be listed, and upon such notice as may be 
required by such exchange, all as more fully provided in said Indenture].

          [If the Security is not to bear interest prior to Maturity, 
insert--The principal of this Security shall not bear interest except in the 
case of a default in payment of principal upon acceleration, upon redemption 
or at Stated Maturity and in such case the overdue principal of this Security 
shall bear interest at the rate of ____% per annum (to the extent that the 
payment of such interest shall be legally enforceable), which shall accrue 
from the date of such default in payment to the date payment of such 
principal has been made or duly provided for.  Interest on any overdue 
principal shall be payable on demand. Any such interest on any overdue 
principal that is not so paid on demand shall bear interest at the rate of 
___% per annum (to the extent that the payment of such interest shall be 
legally enforceable), which shall accrue from the date of such demand for 
payment to the date payment of such interest has been made or duly provided 
for, and such interest shall also be payable on demand.]

          Payment of the principal of (and premium, if any) and 
[if applicable, insert--any such] interest on this Security will be made at 
the office or agency of the Company maintained 

                                     -18-


for that purpose in ______, in Dollars [if applicable, insert--; provided, 
however, that at the option of the Company payment of interest may be made by 
check mailed to the address of the Person entitled thereto as such address 
shall appear in the Security Register].

          Prior to the Release Date (as hereinafter defined), the Securities 
will be secured by First Mortgage Bonds (the "Collateral Bonds") issued and 
delivered by the Company to the Trustee for the benefit of the Holders of the 
Securities (as defined herein), issued under the First Mortgage and Deed of 
Trust dated January 1, 1941, from the Company to First Wisconsin Trust 
Company (now known as Firstar Bank Milwaukee, N.A.), Milwaukee, Wisconsin, as 
supplemented and amended by the supplemental indentures thereto (the "First 
Mortgage Indenture").  Reference is made to the First Mortgage Indenture and 
the Indenture for a description of the rights of the Trustee as holder of the 
Collateral Bonds, the property mortgaged and pledged under the First Mortgage 
Indenture, the rights of the Company and of the Mortgage Trustee in respect 
thereof, the duties and immunities of the applicable Mortgage Trustee, the 
terms and conditions upon which the Collateral Bonds are held by the Trustee 
for the benefit of the Holders of Securities, and the circumstances under 
which additional First Mortgage Bonds may be issued.

          FROM AND AFTER SUCH TIME AS ALL FIRST MORTGAGE BONDS (OTHER THAN 
COLLATERAL BONDS) ISSUED UNDER THE FIRST MORTGAGE INDENTURE HAVE BEEN RETIRED 
THROUGH PAYMENT, REDEMPTION OR OTHERWISE (INCLUDING THOSE FIRST MORTGAGE 
BONDS THE PAYMENT FOR WHICH HAS BEEN PROVIDED FOR IN ACCORDANCE WITH THE 
FIRST MORTGAGE INDENTURE) AT, BEFORE OR AFTER THE MATURITY THEREOF AND 
PROVIDED THAT NO DEFAULT OR EVENT OF DEFAULT UNDER THE INDENTURE HAS OCCURRED 
AND IS CONTINUING (THE "RELEASE DATE"), THE COLLATERAL BONDS SHALL CEASE TO 
SECURE THE SECURITIES IN ANY MANNER, AND, AT THE OPTION OF THE COMPANY, THE 
SECURITIES EITHER (a) WILL BECOME UNSECURED GENERAL OBLIGATIONS OF THE 
COMPANY OR (b) WILL BE SECURED BY FIRST MORTGAGE BONDS ISSUED UNDER AN 
INDENTURE OTHER THAN THE FIRST MORTGAGE INDENTURE.  IN CERTAIN CIRCUMSTANCES 
PRIOR TO THE RELEASE DATE AS PROVIDED IN THE INDENTURE, THE COMPANY IS 
PERMITTED TO REDUCE THE AGGREGATE PRINCIPAL AMOUNT OF AN ISSUE OF COLLATERAL 
BONDS HELD BY THE TRUSTEE, BUT IN NO EVENT PRIOR TO THE RELEASE DATE TO AN 
AMOUNT LESS THAN THE AGGREGATE PRINCIPAL AMOUNT OUTSTANDING OF THE RELATED 
SERIES OF SECURITIES INITIALLY ISSUED CONTEMPORANEOUSLY WITH SUCH COLLATERAL 
BONDS.

          [Include the following paragraph if the Company elects to issue
Substituted Collateral Bonds (as defined in the Indenture):  The Securities will
be secured by First Mortgage Bonds (the "Collateral Bonds") delivered by the
Company to the Trustee for the benefit of the Holders of the Securities, issued
under [the Substituted Mortgage Indenture (as defined in the Indenture)] from
the Company to ________________, as trustee (the "Mortgage Trustee").  Reference
is made to the Substituted Mortgage Indenture and the Indenture for a
description of the rights of the Trustee as holder of the Substituted Collateral
Bonds, the property mortgaged and pledged under the Substituted Mortgage
Indenture, the rights of the Company and of the Mortgage Trustee in respect
thereof, the duties and immunities of the Mortgage Trustee, the terms and
conditions upon which the Substituted Collateral Bonds are secured and the
circumstances under which additional Substituted Collateral Bonds may be
issued.]

                                     -19-



          Reference is hereby made to the further provisions of this Security 
set forth on the reverse hereof, which further provisions shall for all 
purposes have the same effect as if set forth at this place.

          Unless the certificate of authentication hereon has been executed 
by the Trustee referred to on the reverse hereof by manual signature, this 
Security shall not be entitled to any benefit under the Indenture or be valid 
or obligatory for any purpose.

          IN WITNESS WHEREOF, the Company has caused this instrument to be 
duly executed under its corporate seal.

                                          WISCONSIN PUBLIC SERVICE 
                                           CORPORATION


                                           By
                                               -------------------------------
Attest:

- ----------------------                    [SEAL]

     SECTION 2.03.        FORM OF REVERSE OF SECURITY.

          This Security is one of a duly authorized issue of securities of 
the Company (herein called the "Securities"), issued and to be issued in one 
or more series under an Indenture, dated as of December 1, 1998 (herein 
called the "Indenture"), between the Company and Firstar Bank Milwaukee, 
N.A., National Association, as Trustee (herein called the "Trustee," which 
term includes any successor trustee under the Indenture), to which Indenture 
and all indentures supplemental thereto reference is hereby made for a 
statement of the respective rights, limitations of rights, duties and 
immunities thereunder of the Company, the Trustee and the Holders of the 
Securities and of the terms upon which the Securities are, and are to be, 
authenticated and delivered.  This Security is one of the series designated 
on the face hereof[, limited in aggregate principal amount to $_________].

          [If applicable, insert -- The Securities of this series are subject to
redemption upon not less than 30 nor more than 45 days' notice by first class
mail, [if applicable, insert--(l) on ______ in any year commencing with the year
______ and ending with the year _____ through operation of the sinking fund for
this series at a Redemption Price equal to 100% of the principal amount, and
(2)] at any time [on or after _______, _______], as a whole or in part, at the
election of the Company, at the following Redemption Prices (expressed as
percentages of the principal amount):

          If redeemed [on or before ______________, ____%, and if redeemed]
during the 12-month period beginning ____________________ of the years 
indicated,

                                     -20-




                   Redemption                                Redemption
Year                 Price             Year                    Price
- ----                 -----             ----                    -----
                                                    



and thereafter at a Redemption Price equal to ____% of the principal amount, 
together in the case of any such redemption [(if applicable, insert -- (whether 
through operation of the sinking fund or otherwise)] with accrued and unpaid 
interest to the Redemption Date, but interest installments whose Stated 
Maturity is on or prior to such Redemption Date will be payable to the 
Holders of such Securities, or one or more Predecessor Securities, of record 
at the close of business on the relevant Record Dates referred to on the face 
hereof, all as provided in the Indenture.]

          [If applicable, insert -- The Securities of this series are subject to
redemption upon not less than 30 nor more than 45 days' notice by first class
mail, (1) on ____________ in any year commencing with the year ____ and ending
with the year ____ through operation of the sinking fund for this series at the
Redemption Prices for redemption through operation of the sinking fund
(expressed as percentages of the principal amount) set forth in the table below,
and (2) at any time [on or after ____________], as a whole or in part, at the
election of the Company, at the Redemption Prices for redemption otherwise than
through operation of the sinking fund (expressed as percentages of the principal
amount) set forth in the table below:

          If redeemed during a 12-month period beginning ________________ of 
the years indicated,



                                                          Redemption Price for
                                  Redemption Price        Redemption Otherwise
                                   For Redemption             Than Through
                                 Through Operation             Operation
                                       of the                 of the Sinking
           Year                     Sinking Fund                Fund
           ----                  -----------------        ---------------------
                                                    



and thereafter at a Redemption Price equal to ___% of the principal amount, 
together in the case of any such redemption (whether through operation of the 
sinking fund or otherwise) with accrued and unpaid interest to the Redemption 
Date, but interest installments whose Stated Maturity is on or prior to such 
Redemption Date will be payable to the Holders of such Securities, or one or 
more Predecessor Securities, of record at the close of business on the 
relevant Record Dates referred to on the face hereof, all as provided in the 
Indenture.]

                                      -21-


          [Notwithstanding the foregoing, the Company may not, prior to 
________, redeem any Securities of this series as contemplated by [clause (2) 
of] the preceding paragraph as a part of, or in anticipation of, any 
refunding operation by the application, directly or indirectly, of moneys 
borrowed having an interest cost to the Company (calculated in accordance 
with generally accepted financial practice) of less than __% per annum.]

          [The sinking fund for this series provides for the redemption on
_______ in each year beginning with the year _____ and ending with the year
______ of [not less than] $__________ [("mandatory sinking fund") and not more
than $____________] aggregate principal amount of Securities of this series.]
[Securities of this series acquired or redeemed by the Company otherwise than
through [mandatory] sinking fund payments may be credited against subsequent
[mandatory] sinking fund payments otherwise required to be made--in the
[inverse] order in which they become due.]

          [In the event of redemption of this Security in part only, a new
Security or Securities of this series for the unredeemed portion hereof will be
issued in the name of the Holder hereof upon the cancellation hereof.]

          [If the Security is not an Original Issue Discount Security, insert --
If any Event of Default with respect to Securities of this series shall occur
and be continuing, the principal of the Securities of this series may be
declared due and payable in the manner and with the effect provided in the
Indenture.]  [If the Security is an Original Issue Discount Security, insert --
If an Event of Default with respect to Securities of this series shall occur and
be continuing, an amount of principal of the Securities of this series may be
declared due and payable in the manner and with the effect provided in the
Indenture.  Such amount shall be equal--insert formula for determining the
amount.] Upon payment (i) of the amount of principal so declared due and payable
and (ii) of interest on any overdue principal and overdue interest (in each case
to the extent that the payment of such interest shall be legally enforceable),
all of the Company's obligations in respect of the payment of the principal of
and interest, if any, on the Securities of this series shall terminate.

          [This Security is subject to Defeasance as described in the
Indenture.]

          The Indenture may be modified by the Company and the Trustee without
consent of any Holder with respect to certain matters as described in the
Indenture.  In addition, the Indenture permits, with certain exceptions as
therein provided, the amendment thereof and the modification of the rights and
obligations of the Company and the rights of the Holders of the Securities of
each series to be affected under the Indenture at any time by the Company and
the Trustee with the consent of the Holders of a majority in principal amount of
the Securities at the time Outstanding of each series to be affected.  The
Indenture also contains provisions permitting the Holders of a majority in
principal amount of the Securities of each series at the time Outstanding, on
behalf of the Holders of all Securities of such series, to waive compliance by
the Company with certain provisions of the Indenture and certain past defaults
under the Indenture and their consequences.  Any such consent or waiver by the
Holder of this Security shall bind such Holder and all future Holders of this
Security and of 

                                      -22-


any Security issued upon the registration of transfer hereof or in exchange 
hereof or in lieu hereof, whether or not notation of such consent or waiver 
is made upon this Security.

          No reference herein to the Indenture and no provision of this 
Security or of the Indenture shall alter or impair the obligation of the 
Company, which is absolute and unconditional, to pay the principal of (and 
premium, if any) and interest on this Security at the times, place and rate, 
and in the coin or currency, herein prescribed.

          As provided in the Indenture and subject to certain limitations 
therein set forth, the transfer of this Security is registrable in the 
Security Register, upon surrender of this Security for registration of 
transfer at the office or agency of the Company in any place where the 
principal of (and premium, if any) and interest on this Security are payable, 
duly endorsed by, or accompanied by a written instrument of transfer in form 
satisfactory to the Company and the Security Registrar duly executed by the 
Holder hereof or his attorney duly authorized in writing, and thereupon one 
or more new Securities of this series, of authorized denominations and for 
the same Stated Maturity and aggregate principal amount, will be issued to 
the designated transferee or transferees.

          The Securities of this series are issuable only in registered form 
without coupons in denominations of $_______ and any integral multiple 
thereof. As provided in the Indenture and subject to certain limitations 
therein set forth, Securities of this series are exchangeable for a like 
aggregate principal amount of Securities of this series of a different 
authorized denomination, as requested by the Holder surrendering the same.

          No service charge shall be made for any such registration of 
transfer or exchange, but the Company may require payment of a sum sufficient 
to cover any tax or other governmental charge payable in connection therewith.

          Prior to due presentment of this Security for registration of 
transfer, the Company, the Trustee and any agent of the Company or the 
Trustee may treat the Person in whose name this Security is registered as the 
owner hereof for all purposes, whether or not this Security be overdue, and 
neither the Company, the Trustee nor any such agent shall be affected by 
notice to the contrary.

          The Indenture imposes certain limitations on the ability of the 
Company to, among other things, merge or consolidate with any other Person or 
sell, assign, transfer or lease all or substantially all of its properties or 
assets [If other covenants are applicable pursuant to the provisions of 
Section 3.01, insert here].  All such covenants and limitations are subject to 
a number of important qualifications and exceptions.  The Company must report 
periodically to the Trustee on compliance with the covenants in the Indenture.

          A director, officer, employee or shareholder, as such, of the 
Company shall not have any liability for any obligations of the Company under 
this Security or the Indenture or for any claim based on, in respect of, or 
by reason of, such obligations or their creation.  Each Holder, by accepting 
a Security, waives and releases all such liability.  The waiver and release 
are part of the consideration for the issuance of this Security.


                                      -23-


          [If applicable, insert -- Pursuant to a recommendation promulgated by
the Committee on Uniform Security Identification Procedures ("CUSIP"), the
Company has caused CUSIP numbers to be printed on the Securities of this series
as a convenience to the Holders of the Securities of this series.  No
representation is made as to the correctness or accuracy of such numbers as
printed on the Securities of this series and reliance may be placed only on the
other identification numbers printed hereon.]

          All capitalized terms used in this Security without definition which
are defined in the Indenture shall have the meanings assigned to them in the
Indenture.

                                      -24-


                                       
                                ASSIGNMENT FORM

          To assign this Security, fill in the form below:  (I) or (we) assign
and transfer this Security to

- -------------------------------------------------------------------------------
                (Insert assignee's social security or tax I.D. number)

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------
               (Print or type assignee's name, address and zip code)

and irrevocably appoint ___________________________________________ agent to 
transfer this Security on the books of the Company.  The agent may substitute 
another to act for him.

Dated:                          Your Signature:
      ------------------------                 -------------------------------
                                                (Sign exactly as your
                                                name appears on the other
                                                side of this Security)

Signature Guaranty:____________________________________________________
                  [Signatures must be guaranteed by an "eligible
                  guarantor institution" meeting the requirements of
                  the Transfer Agent, which requirements will include
                  membership or participation in STAMP or such other
                  signature guarantee program as may be determined by
                  the Transfer Agent in addition to, or in
                  substitution for, STAMP, all in accordance with the
                  Exchange Act.]

Social Security Number or Taxpayer Identification
Number:
       ---------------------------------------

                                      -25-


          SECTION 2.04.   FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION.

Dated:  _______________



          This is one of the Securities of the series designated therein 
referred to in the within-mentioned Indenture.

                                              --------------------------------
                                                                    As Trustee



                                              By
                                                -------------------------------
                                                           Authorized Signatory

          SECTION 2.05.   SECURITIES ISSUABLE IN THE FORM OF A GLOBAL SECURITY.

          (a)     If the Company shall establish pursuant to Section 3.01 
hereof that the Securities of a particular series are to be issued in whole 
or in part in the form of one or more Global Securities, then the Company 
shall execute and the Trustee shall, in accordance with Section 3.03 hereof 
and the Company Order delivered to the Trustee hereunder, authenticate and 
deliver such Global Security or Securities, which (i) represent, shall be 
denominated in an amount equal to the aggregate principal amount of, and 
shall have the same terms as, the outstanding Securities of such series to be 
represented by such Global Security or Securities, (ii) shall be registered 
in the name of the Depositary or its nominee, (iii) shall be delivered by the 
Trustee to the Depositary or pursuant to the Depositary's instruction and 
(iv) shall bear a legend substantially to the following effect:  "This 
Security is a Global Security registered in the name of the Depositary 
(referred to herein) or a nominee thereof and, unless and until it is 
exchanged in whole or in part for the individual Securities represented 
hereby, this Global Security may not be transferred except as a whole by the 
Depositary to a nominee of the Depositary or by a nominee of the Depositary 
to the Depositary or another nominee of the Depositary or by the Depositary 
or any such nominee to a successor Depositary or a nominee of such successor 
Depositary.  Unless this Global Security is presented by an authorized 
representative of The Depository Trust Company (55 Water Street, New York, 
New York), to the Trustee for registration of transfer, exchange or payment, 
and any certificate issued is registered in the name of Cede & Co. or such 
other name as requested by an authorized representative of The Depository 
Trust Company and any payment is made to Cede & Co., any transfer, pledge or 
other use hereof for value or otherwise by or to any person is wrongful since 
the registered owner hereof, Cede & Co., has an interest herein" or such 
other legend as may be required by the rules and regulations of the 
Depositary.

          (b)     Notwithstanding any other provision of Section 3.05 hereof or
of this Section 2.05, unless the terms of a Global Security expressly permit
such Global Security to be 

                                      -26-


exchanged in whole or in part for individual Securities, a Global Security 
may be transferred, in whole but not in part, only as described in the legend 
thereto.

          (c)     (i)     If at any time the Depositary for a Global Security 
notifies the Company that it is unwilling or unable to continue as Depositary 
for such Global Security or if at any time the Depositary for the Global 
Security shall no longer be eligible or in good standing under the Exchange 
Act or other applicable statute or regulation, the Company shall appoint a 
successor Depositary with respect to such Global Security.  If a successor 
Depositary for such Global Security is not appointed by the Company within 90 
days after the Company receives such notice or becomes aware of such 
ineligibility, the Company's election pursuant to Section 3.01(3) hereof 
shall no longer be effective with respect to the series of Securities 
evidenced by such Global Security and the Company shall execute, and the 
Trustee, upon receipt of a Company Order for the authentication and delivery 
of individual Securities of such series in exchange for such Global Security, 
shall authenticate and deliver, individual Securities of such series of like 
tenor and terms in definitive form in an aggregate principal amount equal to 
the principal amount of the Global Security in exchange for such Global 
Security.  The Trustee shall not be charged with knowledge or notice of the 
ineligibility of a Depositary unless a responsible officer assigned to and 
working in its corporate trustee administration department shall have actual 
knowledge thereof.

          (ii)    The Company may at any time and in its sole discretion 
determine that all Outstanding (but not less than all) Securities of a series 
issued or issuable in the form of one or more Global Securities shall no 
longer be represented by such Global Security or Securities.  In such event 
the Company shall execute, and the Trustee, upon receipt of a Company Order 
for the authentication and delivery of individual Securities in exchange for 
such Global Security, shall authenticate and deliver individual Securities of 
like tenor and terms in definitive form in an aggregate principal amount 
equal to the principal amount of such Global Security or Securities in 
exchange for such Global Security or Securities.

          (iii)   In any exchange provided for in any of the preceding two 
paragraphs, the Company will execute and the Trustee will authenticate and 
deliver individual Securities in definitive registered form in authorized 
denominations.  Upon the exchange of a Global Security for individual 
Securities, such Global Security shall be cancelled by the Trustee.  
Securities issued in exchange for a Global Security pursuant to this Section 
shall be registered in such names and in such authorized denominations as the 
Depositary for such Global Security, pursuant to instructions from its direct 
or indirect participants or otherwise, shall instruct the Trustee.  The 
Trustee shall deliver such Securities to the Depositary for delivery to the 
persons in whose names such Securities are so registered, or if the 
Depositary shall refuse or be unable to deliver such Securities, the Trustee 
shall deliver such Securities to the persons in whose names such Securities 
are registered, unless otherwise agreed upon between the Trustee and the 
Company, in which event the Company shall cause the Securities to be 
delivered to the persons in whose names such Securities are registered.

          (d)     Neither the Company, the Trustee, any Authenticating Agent nor
any paying agent shall have any responsibility or liability for any aspect of
the records relating to, or 

                                      -27-


payments made on account of, beneficial ownership interests of a Global 
Security or for maintaining, supervising or reviewing any records relating to 
such beneficial ownership interest.

          (e)     Pursuant to the provisions of this subsection, at the 
option of the Trustee and upon 30 days' written notice to the Depositary but 
not prior to the first Interest Payment Date of the respective Global 
Securities of the same series, the Depositary shall be required to surrender 
any two or more Global Securities of the same series which have identical 
terms, including, without limitation, identical maturities, interest rates 
and redemption provisions to the Trustee, and the Company shall execute and 
the Trustee shall authenticate and deliver to, or at the direction of, the 
Depositary a Global Security of the same series in principal amount equal to 
the aggregate principal amount of, and with all terms identical to, the 
Global Securities surrendered thereto.  The exchange contemplated in this 
subsection shall be consummated at least 30 days prior to any Interest 
Payment date applicable to any of the Global Securities surrendered to the 
Trustee.  Upon any exchange of any Global Security, whether pursuant to this 
Section or pursuant to Section 3.05 or Section 12.07 hereof, the aggregate 
principal amount of the Securities or a series shall be the same before and 
after such exchange, after giving effect to any retirement of Securities of 
such series.

          SECTION 2.06.   CUSIP NUMBER.

          The Company in issuing Securities of any series may use a "CUSIP" 
number, and, if so, the Trustee may use the CUSIP number in notices of 
redemption or exchange as a convenience to Holders of such series; provided, 
that any such notice may state that no representation is made as to the 
correctness or accuracy of the CUSIP number printed on the notice or on the 
Securities of such series, and that reliance may be placed only on the other 
identification numbers printed on the Securities, and any such redemption 
shall not be affected by any defect in or omission of such numbers.  The 
Company will promptly notify the Trustee of any change in the CUSIP number of 
any series of Securities.

          SECTION 2.07.   PAYMENT OF SECURITIES.

          Payment of the principal, interest and premium on all Securities 
shall be payable as follows:

          (a)     On or before 9:30 a.m., New York City time, or such other 
time as shall be agreed upon between the Trustee and the Company, of the day 
on which payment of principal, interest and premium is due on any Global 
Security pursuant to the terms thereof, the Company shall deliver to the 
Trustee funds available on such date sufficient to make such payment, by wire 
transfer of immediately available funds or by instructing the Trustee to 
withdraw sufficient funds from an account maintained by the Company with the 
Trustee or such other method as is acceptable to the Trustee.  On or 
before 10:00 a.m., New York City time, or such other time as shall be agreed 
upon between the Trustee and the Depositary, of the day on which any payment 
of interest is due on any Global Security (other than at maturity), the 
Trustee shall pay to the Depositary such interest in same day funds.  On or 

                                      -28-



before 10:00 a.m., New York City time or such other time as shall be agreed 
upon between the Trustee and the Depositary, of the day on which principal, 
interest payable at maturity and premium, if any, is due on any Global 
Security, the Trustee shall deposit with the Depositary the amount equal to 
the principal, interest payable at maturity and premium, if any, by wire 
transfer into the account specified by the Depositary.  As a condition to the 
payment, at maturity or upon redemption, of any part of the principal or 
interest on and applicable premium of any Global Security, the Depositary 
shall surrender, or cause to be surrendered, such Global Security to the 
Trustee, whereupon a new Global Security shall be issued to the Depositary 
pursuant to Section 3.05 hereof.

          (b)     With respect to any Security that is not a Global Security, 
principal, applicable premium and interest due at the maturity of the 
Security shall be payable in immediately available funds when due upon 
presentation and surrender of such Security at the corporate trust office of 
the Trustee or at the authorized office of any paying agent.  Interest on any 
Security that is not a Global Security (other than interest payable at 
maturity) shall be paid by check mailed to the Holder thereof at such 
Holder's address as it appears on the register by check payable in 
clearinghouse funds; PROVIDED that if the Trustee receives a written request 
from any Holder of Securities, the aggregate principal amount of which having 
the same Interest Payment Date equals or exceeds $10,000,000, on or before 
the applicable Regular Record Date for such Interest Payment Date, interest 
shall be paid by wire transfer of immediately available funds to a bank 
within the continental United States designated by such Holder in its request 
or by direct deposit into the account of such Holder designated by such 
Holder in its request if such account is maintained with the Trustee or any 
paying agent.

          (c)     The Trustee shall receive the Collateral Bonds or 
Substituted Collateral Bonds from the Company as provided in this Indenture 
and shall hold the Collateral Bonds or Substituted Collateral Bonds, and any 
and all sums payable thereon or with respect thereto or realized therefrom, 
in trust for the benefit of the holders of the Securities, as herein 
provided.  All payments made by or on behalf of the Company to the Trustee on 
a series of Collateral Bonds or Substituted Collateral Bonds shall be deemed 
to be a payment by the Company pursuant to this Section 2.07 and shall be 
applied by the Trustee to pay, when due, principal of, premium, if any, 
and/or interest on the Related Series of Securities and, to the extent so 
applied, shall satisfy the Company's obligations on such Securities.  The 
Company shall cause payment to be made to the Trustee of principal of, 
premium, if any, and (if applicable) interest on a series of Collateral Bonds 
in a manner and at a time that will enable the Trustee to make payments when 
due, of the principal of, premium, if any, and interest on the Related Series 
of Securities.

                                      -29-

                                       
                                  ARTICLE III

                                THE SECURITIES

          SECTION 3.01.   AMOUNT UNLIMITED; ISSUABLE IN SERIES.

          The aggregate principal amount of Securities which may be 
authenticated and delivered under this Indenture is unlimited.

          The Securities may be issued from time to time in one or more 
series. There shall be established in or pursuant to a Board Resolution, and 
set forth in an Officer's Certificate, or established in one or more 
indentures supplemental hereto, prior to the issuance of Securities of any 
series:

          (1) the title of the Securities of the series (which shall 
     distinguish the Securities of the series from all other Securities);

          (2) any limit upon the aggregate principal amount of the Securities 
     of the series which may be authenticated and delivered under this 
     Indenture (except for Securities authenticated and delivered upon 
     registration of transfer of, or in exchange for, or in lieu of, other 
     Securities of the series pursuant to Sections 3.04, 3.05, 3.06, 10.06 or 
     12.07);

          (3) whether any Securities of the series are to be issuable in 
     permanent global form with or without coupons and, if so, (i) whether 
     beneficial owners of interests in any such permanent global Security may 
     exchange such interests for Securities of such series and of like tenor 
     of any authorized form and denomination and the circumstances under 
     which any such exchanges may occur, if other than in the manner provided 
     in Sections 2.05 and 3.05, and (ii) the name of the Depositary with 
     respect to any global Security;

          (4) the date or dates on which the principal of the Securities of 
     the series is payable;

          (5) the rate or rates at which the Securities of the series shall 
     bear interest, if any, the date or dates from which such interest shall 
     accrue, the Interest Payment Dates on which such interest shall be 
     payable and the Regular Record Date for the interest payable on any 
     Interest Payment Date and, if applicable to such series of Securities, 
     the basis points and United States Treasury rate(s) and any other rates 
     to be used in calculating the reset rate;

          (6) the place or places where the principal of (and premium, if 
     any) and interest on Securities of the series shall be payable;

                                     -30-


          (7) the period or periods within which, the price or prices at 
     which and the terms and conditions upon which Securities of the series 
     may be redeemed, in whole or in part, at the option of the Company, 
     pursuant to any sinking fund or otherwise;

          (8) the obligation, if any, of the Company to redeem or purchase 
     Securities of the series pursuant to any sinking fund or analogous 
     provisions or at the option of a Holder thereof and the period or 
     periods within which, the price or prices at which and the terms and 
     conditions upon which Securities of the series shall be redeemed or 
     purchased, in whole or in part, pursuant to such obligation, and, where 
     applicable, the obligation of the Company to select the Securities to be 
     redeemed;

          (9) the denominations in which Securities of the series shall be 
     issuable;

         (10) if other than the principal amount thereof, the portion of the 
     principal amount of Securities of the series which shall be payable upon 
     declaration of acceleration of the Maturity thereof pursuant to Section 
     6.02;

         (11) additional Events of Default with respect to Securities of the 
     series, if any, other than those set forth herein;

         (12) if either or both of Section 14.02 and Section 14.03 shall be 
     inapplicable to the Securities of the series (provided that if no such 
     inapplicability shall be specified, then both Section 14.02 and Section 
     14.03 shall be applicable to the Securities of the series);

         (13) if other than U.S. dollars, the currency or currencies or units 
     based on or related to currencies in which the Securities of such series 
     shall be denominated and in which payments or principal of, and any 
     premium and interest on, such Securities shall or may by payable;

         (14) additional covenants with respect to Securities of the series, 
     if any, other than those set forth herein;

         (15) if prior to the Release Date, the designation of the Related 
     Series of Collateral Bonds being delivered to the Trustee in connection 
     with the issuance of such Securities,

         (16) if on or after the Release Date, the designation of the Related 
     Series of Substituted Collateral Bonds, if any,

         (17) if other than the Trustee, the identity of the Registrar and 
     any Paying Agent; and

         (18) any other terms of the series (which terms shall not be 
     inconsistent with the provisions of this Indenture).

                                      -31-



          All Securities of any one series shall be substantially identical 
except as to denomination and except as may otherwise be provided in or 
pursuant to such Board Resolution and set forth in such Officer's Certificate 
or in any such Indenture supplemental hereto.

          If any of the terms of the series are established by action taken 
pursuant to a Board Resolution, a copy of an appropriate record of such 
action shall be certified by the Secretary or an Assistant Secretary of the 
Company and delivered to the Trustee at or prior to the delivery of the 
Officer's Certificate setting forth, or providing the manner for determining, 
the terms of the Securities of such series.

          SECTION 3.02.   DENOMINATIONS.

          The Securities of each series shall be issuable in registered form 
without coupons in such denominations as shall be specified as contemplated 
by Section 3.01.  In the absence of any such provisions with respect to the 
Securities of any series, the Securities of such series shall be issuable in 
denominations of $1,000 and any integral multiple thereof.

          SECTION 3.03.   EXECUTION, AUTHENTICATION, DELIVERY AND DATING.

          The Securities shall be executed on behalf of the Company by its 
Chairman of the Board, its Vice Chairman of the Board, its President or one 
of its Vice Presidents, under its corporate seal reproduced thereon attested 
by its Secretary or one of its Assistant Secretaries.  The signature of any 
of these officers on the Securities may be manual or facsimile.  The seal of 
the Company may be in the form of a facsimile thereof and may be impressed, 
affixed, imprinted or otherwise reproduced on the Securities.  Typographical 
and other minor errors or defects in any such reproduction of the seal or any 
such signature shall not affect the validity or enforceability of any 
Security that has been duly authenticated and delivered by the Trustee.

          Securities bearing the manual or facsimile signatures of 
individuals who were at any time the proper officers of the Company shall 
bind the Company, notwithstanding that such individuals or any of them have 
ceased to hold such offices prior to the authentication and delivery of such 
Securities or did not hold such offices at the date of such Securities.

          At any time and from time to time after the execution and delivery 
of this Indenture, the Company may deliver Securities of any series executed 
by the Company to the Trustee for authentication, together with a Company 
Order for the authentication and delivery of such Securities, and the Trustee 
in accordance with the Company Order shall authenticate and make such 
Securities available for delivery.  If the form or terms of the Securities of 
the series have been established in or pursuant to one or more Board 
Resolutions as permitted by Sections 2.01 and 3.01, in authenticating such 
Securities, and accepting the additional responsibilities under this 
Indenture in relation to such Securities, the Trustee shall be entitled to 
receive, and (subject to Sections 315(a) through (d) of the Trust Indenture 
Act) shall be fully protected in relying upon, an Opinion of Counsel stating,

                                      -32-


          (a)     if the form of such Securities has been established by or 
pursuant to Board Resolution as permitted by Section 2.01, that such form has 
been established in conformity with the provisions of this Indenture;

          (b)     if the terms of such Securities have been established by or 
pursuant to Board Resolution as permitted by Section 3.01, that such terms 
have been established in conformity with the provisions of this Indenture;

          (c)     that such Securities, when authenticated and delivered by 
the Trustee and issued by the Company in the manner and subject to any 
conditions specified in such Opinion of Counsel, will constitute valid and 
legally binding obligations of the Company, enforceable in accordance with 
their terms, except to the extent enforceability may be limited by applicable 
bankruptcy, insolvency, reorganization, moratorium and other similar laws 
affecting the enforcement of creditors' rights generally and by the effect of 
general principles of equity (regardless of whether enforceability is 
considered in a proceeding in equity or at law);

          (d)     if prior to the Release Date, that the Related Series of 
Collateral Bonds being delivered to the Trustee in connection with the 
issuance of such Securities when authenticated and delivered by the Mortgage 
Trustee and issued by the Company in the manner and subject to any conditions 
specified in such Opinion of Counsel, will constitute valid and binding 
obligations of the Company, enforceable in accordance with their terms, 
except to the extent enforcement may be limited by applicable bankruptcy, 
insolvency, reorganization, moratorium and other similar laws affecting the 
enforcement of creditors' rights generally and by the effect of general 
principles of equity (regardless of whether enforceability is considered in a 
proceeding in equity or at law) and except as enforcement of provisions 
thereof may be limited by state laws affecting the remedies for the 
enforcement of the security provided for in the First Mortgage Indenture; and 
that such Collateral Bonds are entitled to the benefit of the First Mortgage 
Indenture, equally and ratably, with all other First Mortgage Bonds (if any) 
outstanding under the First Mortgage Indenture, except as to sinking fund 
provisions;

          (e)     if any Substituted Collateral Bonds are to be delivered, 
that the Related Series of Substituted Collateral Bonds being delivered to 
the Trustee in connection with the issuance of such Securities when 
authenticated and delivered by the trustee under the Substituted Mortgage 
Indenture and issued by the Company in the manner and subject to any 
conditions specified in such Opinion of Counsel, will constitute valid and 
binding obligations of the Company, enforceable in accordance with their 
terms, except to the extent enforcement may be limited by applicable 
bankruptcy, insolvency, reorganization, moratorium and other similar laws 
affecting the enforcement of creditors' rights generally and by the effect of 
general principles of equity (regardless of whether enforceability is 
considered in a proceeding in equity or at law) and except as enforcement of 
provisions thereof may be limited by state laws affecting the remedies for 
the enforcement of the security provided for in the Substituted Mortgage 
Indenture; and that such Substituted Collateral Bonds are entitled to the 
benefit of the Substituted Mortgage Indenture, equally and ratably, with all 
other First Mortgage Bonds (if any) outstanding under the Substituted First 
Mortgage Indenture, except as to sinking fund provisions;

                                      -33-


          (f)     that no consent, approval, authorization, order, 
registration or qualification of or with any court or any governmental agency 
or body having jurisdiction over the Company is required for the execution 
and delivery of such Securities by the Company, except such as have been 
obtained (except that no opinion need be expressed as to state securities or 
Blue Sky laws).

If such form or terms have been so established, the Trustee shall not be 
required to authenticate such Securities if the issue of such Securities 
pursuant to this Indenture will affect the Trustee's own rights, duties or 
immunities under the Securities and this Indenture or otherwise in a manner 
which is not reasonably acceptable to the Trustee, or in the written opinion 
of counsel to the Trustee (which counsel may be an employee of the Trustee) 
such authentication may not lawfully be made or would involve the Trustee in 
personal liability.

          Notwithstanding the provisions of Section 3.01 and of the 
immediately preceding paragraph, if all Securities of a series are not to be 
originally issued at one time, it shall not be necessary to deliver the 
Officer's Certificate otherwise required pursuant to Section 3.01 or the 
Company Order and Opinion of Counsel otherwise required pursuant to the 
immediately preceding paragraph at or prior to the time of authentication of 
each Security of such series if such documents are delivered at or prior to 
the authentication upon original issuance of the first Security of such 
series to be issued.

          If the Company shall establish pursuant to Section 3.01 that the 
Securities of a series are to be issued in the form of one or more global 
Securities, then the Company shall execute and the Trustee shall, in 
accordance with this section and the Company Order with respect to the 
authentication and delivery of such series, authenticate and deliver one or 
more global Securities that (i) shall be in an aggregate amount equal to the 
aggregate principal amount specified in such Company Order, (ii) shall be 
registered in the name of the Depositary therefor or its nominee, and (iii) 
shall be made available for delivery by the Trustee to the Depositary or 
pursuant to the Depositary's instruction.

          Each depositary designated pursuant to Section 3.01 must, at the 
time of its designation and at all times while it serves as depositary, be a 
clearing agency registered under the Exchange Act and any other applicable 
statute or regulation.

          Unless otherwise provided for in the form of Security, each 
Security shall be dated the date of its authentication.

          No Security shall be entitled to any benefit under this Indenture 
or be valid or obligatory for any purpose unless there appears on such 
Security a certificate of authentication substantially in the form provided 
for herein executed by the Trustee by manual signature, and such certificate 
upon any Security shall be conclusive evidence, and the only evidence, that 
such Security has been duly authenticated and delivered hereunder and is 
entitled to the benefits of this Indenture.

                                      -34-


          SECTION 3.04.   TEMPORARY SECURITIES.

          Pending the preparation of definitive Securities of any series, the 
Company may execute, and upon Company Order the Trustee shall authenticate 
and make available for delivery, temporary Securities which are printed, 
lithographed, typewritten, mimeographed or otherwise produced, in any 
authorized denomination, substantially of the tenor of the definitive 
Securities in lieu of which they are issued and with such appropriate 
insertions, omissions, substitutions and other variations as the officers 
executing such Securities may determine, as evidenced by their execution of 
such Securities.

          In the case of Securities of any series, such temporary Securities 
may be in global form, representing all or a portion of the Outstanding 
Securities of such series.

          Except in the case of temporary Securities in global form (which 
shall be exchanged in accordance with the provisions of Section 3.05), if 
temporary Securities of any series are issued, the Company will cause 
definitive Securities of that series to be prepared without unreasonable 
delay.  After the preparation of definitive Securities of such series, the 
temporary Securities of such series shall be exchangeable for definitive 
Securities of such series upon surrender of the temporary Securities of such 
series at the office or agency of the Company in a Place of Payment for that 
series, without charge to the Holder. Upon surrender for cancellation of any 
one or more temporary Securities of any series, the Company shall execute and 
the Trustee shall authenticate and make available for delivery in exchange 
therefor a like principal amount of definitive Securities of the same series 
of authorized denominations and of like tenor.  Until so exchanged, the 
temporary Securities of any series shall in all respects be entitled to the 
same benefits under this Indenture as definitive Securities of such series.

          If temporary Securities of any series are issued in global form, 
any such temporary global Security shall, unless otherwise provided therein, 
be delivered to the office of the Depositary therefor for credit to the 
respective accounts of the beneficial owners of such Securities (or to such 
other accounts as they may direct).

          SECTION 3.05.   REGISTRATION, REGISTRATION OF TRANSFER AND EXCHANGE.

          The Company shall cause to be kept at the Corporate Trust Office of 
the Trustee a register (the register maintained in such office and in any 
other office or agency of the Company in a Place of Payment being herein 
sometimes collectively referred to as the "SECURITY REGISTER") in which, 
subject to such reasonable regulations as it may prescribe, the Company shall 
provide for the registration of Securities and of registration of transfers 
of Securities.  The Trustee is hereby appointed "SECURITY REGISTRAR" for the 
purpose of registering Securities and transfers of Securities as herein 
provided.

          Upon surrender for registration of transfer of any Security of any
series at the office or agency of the Company in Place of Payment for that
series, the Company shall execute, and the Trustee shall authenticate and make
available for delivery, in the name of the 

                                      -35-


designated transferee or transferees, one or more new Securities of the same 
series, of any authorized denominations and of a like aggregate principal 
amount and Stated Maturity.

          At the option of the Holder, Securities of any series may be 
exchanged for other Securities of the same series, of any authorized 
denominations and of a like aggregate principal amount and Stated Maturity, 
upon surrender of the Securities to be exchanged at such office or agency.  
Whenever any Securities are so surrendered for exchange, the Company shall 
execute, and the Trustee shall authenticate and make available for delivery, 
the Securities which the Holder making the exchange is entitled to receive.

          If the principal amount and applicable premium, of part but not all 
of a Global Security is paid, then upon surrender to the Trustee of such 
Global Security, the Company shall execute and the Trustee shall 
authenticate, deliver and register a Global Security in an authorized 
denomination in aggregate principal amount equal to, and having the same 
terms and of the same series as, the unpaid portion of such Global Security.

          All Securities issued upon any registration of transfer or exchange 
of Securities shall be the valid obligations of the Company, evidencing the 
same debt, and entitled to the same benefits under this Indenture, as the 
Securities surrendered upon such registration of transfer or exchange.

          Every Security presented or surrendered for registration of 
transfer or for exchange shall (if so required by the Company or the Trustee) 
be duly endorsed, or be accompanied by a written instrument of transfer in 
form satisfactory to the Company and the Security Registrar duly executed, by 
the Holder thereof or his attorney duly authorized in writing.

          Unless otherwise provided in the Securities to be transferred or 
exchanged, no service charge shall be made for any registration of transfer 
or exchange of Securities, but the Company may require payment of a sum 
sufficient to cover any tax or other governmental charge that may be imposed 
in connection with any registration of transfer or exchange of Securities, 
other than exchanges pursuant to Section 3.04, 10.06 or 12.07 not involving 
any transfer.

          The Company shall not be required (i) to issue, register the 
transfer of or exchange Securities of any series during a period beginning at 
the opening of business 15 days before the day of the mailing of a notice of 
redemption of Securities of that series selected for redemption under Section 
12.03 and ending at the close of business on the day of such mailing, or (ii) 
to register the transfer of or exchange any Security so selected for 
redemption in whole or in part, except the unredeemed portion of any Security 
being redeemed in part.

          SECTION 3.06.   MUTILATED, DESTROYED, LOST AND STOLEN SECURITIES.

          If any mutilated Security is surrendered to the Trustee, the Company
shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new Security of 

                                      -36-


the same series and of like tenor and principal amount and bearing a number 
not contemporaneously outstanding.

          If there shall be delivered to the Company and the Trustee (i) 
evidence to their satisfaction of the destruction, loss or theft of any 
Security and (ii) such security or indemnity as may be required by them to 
save each of them and any agent of either of them harmless, then, in the 
absence of notice to the Company or the Trustee that such Security has been 
acquired by a bona fide purchaser, the Company shall execute and upon its 
request the Trustee shall authenticate and deliver, in lieu of any such 
destroyed, lost or stolen Security, a new Security of the same series and of 
like tenor and principal amount and bearing a number not contemporaneously 
outstanding.

          In case any such mutilated, destroyed, lost or stolen Security has 
become or is about to become due and payable, the Company in its discretion 
may, instead of issuing a new Security, pay such Security.

          Upon the issuance of any new Security under this Section, the 
Company may require the payment of a sum sufficient to cover any tax or other 
governmental charge that may be imposed in relation thereto and any other 
expenses (including the fees and expenses of the Trustee) connected therewith.

          Every new Security of any series issued pursuant to this Section in 
lieu of any destroyed, lost or stolen Security shall constitute an original 
additional contractual obligation of the Company, whether or not the 
destroyed, lost or stolen Security shall be at any time enforceable by 
anyone, and shall be entitled to all the benefits of this Indenture equally 
and proportionately with any and all other Securities of that series duly 
issued hereunder.

          The provisions of this Section are exclusive and shall preclude (to 
the extent lawful) all other rights and remedies with respect to the 
replacement or payment of mutilated, destroyed, lost or stolen Securities.

          SECTION 3.07.   PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED.

          Interest on any Security which is payable, and is punctually paid 
or duly provided for, on any Interest Payment Date shall be paid to the 
Person in whose name that Security (or one or more Predecessor Securities) is 
registered at the close of business on the Regular Record Date for such 
interest.

          Any interest on any Security of any series which is payable, but is 
not punctually paid or duly provided for, on any Interest Payment Date 
(herein called "DEFAULTED INTEREST") shall forthwith cease to be payable to 
the Holder on the relevant Regular Record Date by virtue of having been such 
Holder, and such Defaulted Interest may be paid by the Company, at its 
election in each case, as provided in Clause (1) or (2) below:

          (1) The Company may elect to make payment of any Defaulted Interest 
     to the Persons in whose names the Securities of such series (or their 
     respective

                                      -37-



     Predecessor Securities) are registered at the close of business on a 
     Special Record Date for the payment of such Defaulted Interest, which 
     shall be fixed in the following manner.  The Company shall notify the 
     Trustee in writing of the amount of Defaulted Interest proposed to be 
     paid on each Security of such series and the date of the proposed 
     payment, and at the same time the Company shall deposit with the Trustee 
     an amount of money equal to the aggregate amount proposed to be paid in 
     respect of such Defaulted Interest or shall make arrangements 
     satisfactory to the Trustee for such deposit prior to the date of the 
     proposed payment, such money when deposited to be held in trust for the 
     benefit of the Persons entitled to such Defaulted Interest as in this 
     Section 3.07 provided.  Thereupon the Trustee shall fix a Special Record 
     Date for the payment of such Defaulted Interest which shall be not more 
     than 15 days and not less than 10 days prior to the date of the proposed 
     payment and not less than 10 days after the receipt by the Trustee of 
     the notice of the proposed payment.  The Trustee shall promptly notify 
     the Company of such Special Record Date and, in the name and at the 
     expense of the Company, shall cause notice of the proposed payment of 
     such Defaulted Interest and the Special Record Date therefor to be 
     mailed, first-class postage prepaid, to each Holder of Securities of 
     such series at his address as it appears in the Security Register, not 
     less than 10 days prior to such Special Record Date.  Notice of the 
     proposed payment of such Defaulted Interest and the Special Record Date 
     therefor having been so mailed, such Defaulted Interest shall be paid to 
     the Persons in whose names the Securities of such series (or their 
     respective Predecessor Securities) are registered at the close of 
     business on such Special Record Date and shall no longer be payable 
     pursuant to the following Clause (2).

          (2) The Company may make payment of any Defaulted Interest on the 
     Securities of any series in any other lawful manner not inconsistent 
     with the requirements of any securities exchange on which such 
     Securities may be listed, and upon such notice as may be required by 
     such exchange, if, after notice given by the Company to the Trustee of 
     the proposed payment pursuant to this Section 3.07, such manner of 
     payment shall be deemed practicable by the Trustee.

          Subject to the foregoing provisions of this Section, each Security 
delivered under this Indenture upon registration of transfer of or in 
exchange for or in lieu of any other Security shall carry the rights to 
interest accrued and unpaid, and to accrue, which were carried by such other 
Security.

          SECTION 3.08.   PERSONS DEEMED OWNERS.

          Prior to due presentment of a Security for registration of 
transfer, the Company, the Trustee and any agent of the Company or the 
Trustee may treat the Person in whose name such Security is registered as the 
owner of such Security for the purpose of receiving payment of principal of 
(and premium, if any) and (subject to Section 3.07) interest on such Security 
and for all other purposes whatsoever, whether or not such Security be 
overdue, and neither the Company, the Trustee nor any agent of the Company or 
the Trustee shall be affected by notice to the contrary.

                                      -38-


          None of the Company, the Trustee or any agent of the Company or the 
Trustee shall have any responsibility or liability for any aspect of the 
records relating to or payments made on account of beneficial ownership 
interest of a Security in global form, or for maintaining, supervising or 
reviewing any records relating to such beneficial ownership interest.  
Notwithstanding the foregoing, with respect to any Security in global form, 
nothing herein shall prevent the Company or the Trustee or any agent of the 
Company or the Trustee from giving effect to any written certification, proxy 
or other authorization furnished by any Depositary (or its nominee), as a 
Holder, with respect to such Security in global form or impair, as between 
such Depositary and owners of beneficial interests in such Security in global 
form, the operation of customary practices governing the exercise of the 
right of such Depositary (or its nominee) as holder of such Security in 
global form.

          SECTION 3.09.   CANCELLATION.

          All Securities surrendered for payment, redemption, registration of 
transfer or exchange or for credit against any sinking fund payment shall, if 
surrendered to any Person other than the Trustee, be delivered to the Trustee 
and shall be promptly cancelled by it.  The Company may at any time deliver 
to the Trustee for cancellation any Securities previously authenticated and 
delivered hereunder which the Company may have acquired in any manner 
whatsoever, and all Securities so delivered shall be promptly cancelled by 
the Trustee.  No Securities shall be authenticated in lieu of or in exchange 
for any Securities cancelled as provided in this Section, except as expressly 
permitted by this Indenture.  All cancelled Securities shall be held by the 
Trustee and may be destroyed (and, if so destroyed, certification of their 
destruction shall be delivered to the Company, unless, by a Company Order, 
the Company shall direct that cancelled Securities be returned to it).

          SECTION 3.10.   COMPUTATION OF INTEREST.

          Except as otherwise specified as contemplated by Section 3.01 for 
Securities of any series, interest on the Securities of each series shall be 
computed on the basis of a year of twelve 30-day months.

                                      -39-

                                       
                                   ARTICLE IV

                          COLLATERAL BONDS; PLEDGED
                         SUBSTITUTED COLLATERAL BONDS

          SECTION 4.01.   DELIVERY AND ACCEPTANCE OF COLLATERAL BONDS.

          Upon the issuance of Securities hereunder at any time prior to the 
Release Date, the Company shall issue and deliver to the Trustee to hold in 
trust for the benefit of the Holders of the Securities as described in 
Section 4.08, and the Trustee shall accept therefor, a Related Series of 
Collateral Bonds registered in the name of the Trustee conforming to the 
requirements of Section 4.02.

          SECTION 4.02.   TERMS OF COLLATERAL BONDS.

          Each series of Collateral Bonds delivered to the Trustee pursuant 
to Section 4.06 shall have the same stated rate or rates of interest (or 
interest calculated in the same manner), Interest Payment Dates, stated 
maturity date and redemption provisions, and shall be in the same aggregate 
principal amount, as the series of Securities in connection with which such 
Collateral Bonds shall have been issued and delivered.

          SECTION 4.03.   COLLATERAL BONDS HELD BY THE TRUSTEE.

          The Trustee, as a Holder of Collateral Bonds, shall attend any 
meeting of Bondholders under the First Mortgage Indenture as to which it 
receives due notice, or, at its option, shall deliver its proxy in connection 
therewith. Either at such meeting, or otherwise where consent of Holders of 
First Mortgage Bonds issued under the First Mortgage Indenture is sought 
without a meeting, the Trustee shall vote all of the Collateral Bonds held by 
it, or shall consent or withhold its consent with respect thereto, as 
directed by the Holders of not less than a majority in the aggregate 
principal amount of the outstanding Securities; provided, however, that the 
Trustee shall not vote as such Holder of any particular series of Collateral 
Bonds in favor of, or give its consent to, any action which in the Trustee's 
opinion, would materially adversely affect such series of Collateral Bonds in 
a manner not shared generally by all other Collateral Bonds, except upon 
notification by the Trustee to the Holders of the Related Series of 
Securities of such proposal and consent thereto of the Holders of not less 
than a majority in aggregate principal amount of the outstanding Securities 
of such series.

          SECTION 4.04.   NO TRANSFER OF COLLATERAL BONDS; EXCEPTION.

          Except (i) as required to effect an assignment to a successor 
trustee under this Indenture, (ii) pursuant to Section 4.05 or Section 4.07 
hereof or (iii) in compliance with a final order of a court of competent 
jurisdiction in connection with any bankruptcy or reorganization proceeding 
of the Company and in compliance with the applicable provisions of Section 
184.04(2) of the Wisconsin Statutes or any successor statutory provision, the 
Trustee shall not sell, assign or transfer the Collateral Bonds, whether or 
not such sale would be in compliance with the provisions of Section 184.04(2) 
of the Wisconsin Statutes or any successor 

                                      -40-


statutory provision, and the Company shall issue stop transfer instructions 
to the Mortgage Trustee and any transfer agent under the First Mortgage 
Indenture to effect compliance with this Section 4.04 and such statute.

          SECTION 4.05.   DELIVERY TO THE COMPANY OF ALL COLLATERAL BONDS.

          When the obligation of the Company to make payment with respect to 
the principal of and premium, if any, and interest on any series of 
Collateral Bonds shall cease and be discharged pursuant to Section 4.08 or 
Section 5.01, the Trustee shall, upon written request of the Company and 
receipt of the certificate of the Expert described in Section 4.10(b) hereof 
(if such certificate is then required by Section 4.10(b) hereof), deliver to 
the Company all of such Collateral Bonds, together with such appropriate 
instruments of transfer or release as may be reasonably requested by the 
Company.  All Collateral Bonds delivered to the Company in accordance with 
this Section 4.03 shall be delivered by the Company to the Mortgage Trustee 
for cancellation.

          SECTION 4.06.   FURTHER ASSURANCES.

          The Company, at its own expense, shall do such further lawful acts 
and things, and execute and deliver such additional conveyances, assignments, 
assurances, agreements and instruments, as may be necessary in order to 
better assign, assure and confirm to the Trustee its interest in the 
Collateral Bonds and for maintaining, protecting and preserving such 
interest.  The Trustee may petition any court of competent jurisdiction to 
seek any relief it considers necessary or advisable in order to maintain, 
protect and preserve such interest.

          SECTION 4.07.   EXCHANGE AND SURRENDER OF COLLATERAL BONDS.

          At any time at the written direction of the Company, the Trustee 
shall surrender to the Company all or part of the Collateral Bonds in 
exchange for Collateral Bonds equal in aggregate outstanding principal amount 
to, in different denominations than, but of the same series and with all 
other terms identical to, the Collateral Bonds so surrendered to the Company. 
In addition, at any time a Security shall cease to be entitled to any 
benefit or security under this Indenture pursuant to Section 5.01, the 
Trustee shall surrender an equal principal amount of the Related Series of 
Collateral Bonds, subject to the limitations of this Section 4.07, to the 
Company for cancellation.  The Trustee shall, together with such Collateral 
Bonds, deliver to the Company such appropriate instruments of transfer, and 
such appropriate instruments for releasing the Company of its obligations 
under such surrendered Collateral Bonds, as the Company may reasonably 
request.  Prior to the surrender required by this paragraph, the Trustee 
shall receive from the Company, and (subject to Section 7.01) shall be fully 
protected in relying upon, an Officers' Certificate stating (i) the aggregate 
outstanding principal amount of the Collateral Bonds of the issue surrendered 
by the Trustee, after giving effect to such surrender, (ii) the aggregate 
outstanding principal amount of the Related Series of Securities, (iii) that 
the surrender of the Collateral Bonds will not result in any default under 
this Indenture, and (iv) that any Collateral Bonds to be received in exchange 
for the Collateral 

                                      -41-


Bonds being surrendered comply with the provisions of this Section 4.07 and 
the First Mortgage Indenture.

          The Company shall not be permitted to cause the surrender or 
exchange of all or any part of an issue of Collateral Bonds contemplated in 
this Section 4.07, if after such surrender or exchange, the aggregate 
outstanding principal amount of the Related Series of Securities would exceed 
the aggregate outstanding principal amount of such issue of Collateral Bonds 
held by the Trustee.  Any Collateral Bonds received by the Company pursuant 
to this Section 4.07 shall be delivered to the Mortgage Trustee for 
cancellation. Notwithstanding anything herein to the contrary, until the 
Release Date, the Company shall preserve and maintain the lien of this 
Indenture, and shall not permit, at anytime prior to the Release Date, the 
aggregate principal amount of Collateral Bonds held by the Trustee to be less 
than the aggregate amount of Securities Outstanding.

          SECTION 4.08.   COLLATERAL BONDS AS SECURITY FOR SECURITIES; 
APPLICATION OF PAYMENT ON COLLATERAL BONDS.

          Until the Release Date and subject to Article Five, the Related 
Series of Collateral Bonds delivered to the Trustee, in trust for the benefit 
of the Holders of the applicable issue of Securities, shall pay principal of, 
interest and premium, if any, in accordance with their respective terms and 
shall serve as security for any and all obligations of the Company under such 
Securities, including, but not limited to (1) the full and prompt payment of 
the principal of and premium, if any, on such Related Series of Securities 
when and as the same shall become due and payable in accordance with the 
terms and provisions of this Indenture or such Related Series of Securities, 
either at the stated maturity thereof, upon acceleration of the maturity 
thereof, or upon redemption (any such payment with respect to such Related 
Series of Securities to be made by the Company through payment on the Related 
Series of Collateral Bonds and applied by the Trustee to satisfy the 
Company's corresponding obligations under such Securities), and (2) the full 
and prompt payment of any interest on such Related Series of Securities when 
and as the same shall become due and payable in accordance with the terms and 
provisions of this Indenture or such Related Series of Securities.  Any 
payment by the Company of principal of, premium, if any, and interest on, a 
series of First Mortgage Bonds will be applied by the Trustee to satisfy the 
Company's obligations with respect to the principal of, premium, if any, and 
interest on, the Related Series of Securities.

          Notwithstanding anything in this Indenture to the contrary, from and
after the Release Date, the obligation of the Company to make payment with
respect to the principal of and premium, if any, and interest on the Collateral
Bonds shall cease and be discharged as provided in the supplemental trust
indenture or indentures to the First Mortgage Indenture creating such Collateral
Bonds and the Collateral Bonds shall cease to secure in any manner Securities
theretofore or subsequently issued.  From and after the Release Date, any
conditions to the issuance of Securities that refer or relate to Collateral
Bonds or the First Mortgage Indenture shall be inapplicable unless the Company
delivers Substituted Collateral Bonds to the Trustee pursuant to Section 4.09
hereof, in which event such provisions shall be deemed to refer or relate to the
Substituted Collateral Bonds.  Following the Release Date, the Company 

                                      -42-



shall cause the First Mortgage Indenture to be discharged and satisfied and 
the Company shall not issue any additional First Mortgage Bonds under the 
First Mortgage Indenture.  Notice of the occurrence of the Release Date shall 
be given by the Trustee to the Holders of the Securities in the manner 
provided in Section 1.06 not later than 30 days after the Company notifies 
the Trustee of the occurrence of the Release Date.

          SECTION 4.09.   SUBSTITUTED COLLATERAL BONDS.

          (a)     The Company shall notify the Trustee not less than 90 days 
prior to the Release Date if the Company has determined to deliver to the 
Trustee on the Release Date Substituted Collateral Bonds in an aggregate 
principal amount equal to the aggregate principal amount of Securities 
outstanding on the Release Date in trust for the benefit of the Holders from 
time to time of the Securities issued under this Indenture as security for 
any and all obligations of the Company under the Securities, including but 
not limited to, (1) the full and prompt payment of the principal of and 
premium, if any, on the Securities when and as the same shall become due and 
payable in accordance with the terms and provisions of this Indenture or the 
Securities, either at the stated maturity thereof, upon acceleration of the 
maturity thereof or upon redemption, and (2) the full and prompt payment of 
any interest on the Securities when and as the same shall become due and 
payable in accordance with the terms and provisions of this Indenture or the 
Securities.

          (b)     The Substituted Collateral Bonds to be delivered pursuant 
to the notice described in Section 4.09 (a) shall be delivered in separate 
series and issues corresponding to the series and issues of Securities 
outstanding on the Release Date, each issue of Substituted Collateral Bonds 
having the same stated rate or rates of interest (or interest calculated in 
the same manner), Interest Payment Dates, stated maturity date and redemption 
provisions, and in the same aggregate principal amount, as the Related Series 
of Securities outstanding on the Release Date.

          (c)     The notice described in Section 4.09(a) shall also state 
that on the Release Date the Company shall deliver to the Trustee a 
supplemental indenture to this Indenture that will provide, among other 
things, that upon the issuance of Securities hereunder on or after the 
Release Date, the Company shall deliver to the Trustee in trust for the 
benefit of the Holders as described in Section 4.09(a), and the Trustee shall 
accept therefor, a Related Series of Substituted Collateral Bonds registered 
in the name of the Trustee and conforming to the requirements therein 
specified.

          (d)     The determination whether to issue and deliver Substituted 
Collateral Bonds shall be made in the Company's sole discretion and without 
any obligation to do so.

          (e)     In the event that the Company does not deliver the notice 
described in Section 4.09(a), the Securities outstanding on the Release Date 
shall, as of the Release Date, no longer be entitled to the benefit of the 
security of the Collateral Bonds and shall thereafter be general unsecured 
obligations of the Company.

                                      -43-


          (f)     Following the delivery of Substituted Collateral Bonds to 
the Trustee pursuant to this Section 4.09, all of the provisions of this 
Indenture relating to Collateral Bonds and the First Mortgage Indenture shall 
also apply to the Substituted Collateral Bonds and the Substituted Mortgage 
Indenture, to the same extent as if the Substituted Collateral Bonds and 
Substituted Mortgage Indenture were expressly referred to therein.

          SECTION 4.10.   FAIR VALUE CERTIFICATE

          (a)     Upon the delivery by the Company to the Trustee of 
Collateral Bonds pursuant to Section 4.01 hereof, or Substituted Collateral 
Bonds pursuant to Section 4.09 hereof, the Company shall simultaneously 
therewith deliver to the Trustee a certificate of an Expert (1) stating that 
it is familiar with the provisions of such Collateral Bonds or Substituted 
Collateral Bonds and of this Indenture; (2) stating the principal amount of 
such Collateral Bonds or Substituted Collateral Bonds so delivered, the 
stated interest rate (or method of calculation of interest) of such 
Collateral Bonds or Substituted Collateral Bonds and the stated maturity date 
of such Collateral Bonds or Substituted Collateral Bonds; (3) identifying the 
Securities being issued contemporaneously therewith, and (4) stating the fair 
value to the Company of such Collateral Bonds or Substituted Collateral 
Bonds.  If the fair value to the Company of the Collateral Bonds or 
Substituted Collateral Bonds so delivered, as described in the certificate to 
be delivered pursuant to this Section 4.10(a), both (w) is equal to or 
exceeds (i) $25,000 and (ii) 1% of the principal amount of the Securities 
outstanding at the date of delivery of such Collateral Bonds or Substituted 
Collateral Bonds and (x) together with the fair value to the Company, as 
described in the certificates to be delivered pursuant to this Section 
4.10(a), of all other Collateral Bonds or Substituted Collateral Bonds 
delivered to the Trustees since the commencement of the then current calendar 
year, is equal to or exceeds 10% of the principal amount of the Securities 
Outstanding at the date of delivery of such Collateral Bonds or Substituted 
Collateral Bonds, then the certificate required by this Section 4.10 (a) 
shall (y) be delivered by an Expert who shall be independent of the Company 
and satisfactory to the Trustee in its reasonable judgement and (z) shall, in 
addition to the verifications described above, state the fair value to the 
Company of all Collateral Bonds or Substituted Collateral Bond delivered to 
the Trustee pursuant to Section 4.08 or 4.09 hereof since the commencement of 
the then current year as to which a certificate was not delivered by an 
Expert independent of the Company.

          (b)     If Collateral Bonds or Substituted Collateral Bonds are 
delivered or surrendered to the Company pursuant to Section 4.05 or 4.07 
hereof, the Company shall simultaneously therewith deliver to the Trustee a 
certificate of an Expert (1) stating that it is familiar with the provisions 
of such Collateral Bonds or Substituted Collateral Bonds and of this 
Indenture, (2) stating the principal amount of such Collateral Bonds or 
Substituted Collateral Bonds so delivered, the stated interest rate (or 
method of calculation of interest) of such Collateral Bonds or Substituted 
Collateral Bonds, (3) if applicable, identifying the Securities, the payment 
of the interest on and principal of which has been discharged hereunder, and 
(4) stating that such delivery and release will not impair the lien of this 
Indenture in contravention of the provisions of this Indenture.  If the fair 
value of the Collateral Bonds or Substituted Collateral Bonds so delivered 
and released, as described in the

                                      -44-


certificate to be delivered pursuant to this Section 4.10(b), both (1) is 
equal to or exceeds (i) $25,000 and (ii) 1% of the principal amount of the 
outstanding Securities at the date of release of such Collateral Bonds or 
Substituted Collateral Bonds and (2) together with the fair value, as 
described in the certificates to be delivered pursuant to this Section 
4.10(b), of all other Collateral Bonds or Substituted Collateral Bonds 
released from the lien of this Indenture since the commencement  of the then 
current calendar year, is equal to or exceeds 10% of the principal amount of 
the Securities Outstanding at the date of release of such Collateral Bonds or 
Substituted Collateral Bonds, then the certificate required by this Section 
4.10(b) shall be delivered by an Expert who shall be independent of the 
Company.

          If, in connection with a delivery or release of outstanding 
Collateral Bonds or Substituted Collateral Bonds, the Company provides to the 
Trustee and Opinion of Counsel stating that the certificate described by this 
Section 4.10 is not required by law, such certificate shall not be required 
to be delivered hereunder in connection with such delivery or release.

                                      -45-


                                       
                                   ARTICLE V

                          SATISFACTION AND DISCHARGE

          SECTION 5.01.   SATISFACTION AND DISCHARGE OF INDENTURE.

          This Indenture shall cease to be of further effect (except as to 
any surviving rights of registration of transfer or exchange of Securities 
herein expressly provided for or in the form of Security for such series), 
when the Trustee, upon Company Request and at the expense of the Company, 
shall execute proper instruments acknowledging satisfaction and discharge of 
this Indenture, when

          (a)     either

          (1)     all Securities theretofore authenticated and delivered 
(other than (A) Securities which have been destroyed, lost or stolen and 
which have been replaced or paid as provided in Section 3.06 and (B) 
Securities for whose payment money has theretofore been deposited in trust or 
segregated and held in trust by the Company and thereafter repaid to the 
Company or discharged from such trust, as provided in Section 11.08) have 
been delivered to the Trustee for cancellation; or

          (2)     all such Securities not  theretofore delivered  to the 
Trustee for  cancellation

          (A)     have become due and payable, or

          (B)     will become due and payable at their Stated Maturity within 
one year, or

          (C)     are to be called for redemption within one year under 
arrangements satisfactory to the Trustee for the giving of notice of 
redemption by the Trustee in the name, and at the expense, of the Company,

and the Company, in the case of (A), (B) or (C) above, has deposited with the 
Trustee as trust funds in trust for the purpose an amount sufficient to pay 
and discharge the entire indebtedness on such Securities not theretofore 
delivered to the Trustee for cancellation, for principal (and premium, if 
any) and interest to the date of such deposit (in the case of Securities 
which have become due and payable) or the Stated Maturity or Redemption Date, 
as the case may be;

          (b)     the Company has paid or caused to be paid all other sums
     payable hereunder by the Company; and

          (c)     the Company has delivered to the Trustee an Officer's
     Certificate and an Opinion of Counsel, each stating that all conditions
     precedent provided for herein relating to the satisfaction and discharge of
     this Indenture have been complied with.

                                      -46-


          Notwithstanding the satisfaction and discharge of this Indenture, 
the obligations of the Company to the Trustee under Section 7.07, the 
obligations of the Company to any Authenticating Agent under Section 7.14 
and, if money shall have been deposited with the Trustee pursuant to 
subclause (2) of clause (a) of this Section 5.01, the obligations of the 
Trustee under Section 5.02 and the last paragraph of Section 11.08 shall 
survive.

          If the Company shall have paid or caused to be paid in whole or in 
part the principal of and premium, if any, and interest on any Security, as 
and when the same shall become due and payable or the Company shall have 
delivered to the Trustee for cancellation any outstanding Security, such 
Security shall cease to be entitled to the lien, benefit or security interest 
under this Indenture to the extent of such amounts paid.  Upon a Security of 
any series ceasing to be entitled to the lien, benefit or security under this 
Indenture, the obligation of the Company to make payment with respect to 
principal of and premium, if any, and interest on a principal amount of the 
Related Series of Collateral Bonds or Related Series of Substituted 
Collateral Bonds equal to the principal amount of such Security shall be 
satisfied and discharged and such portion of the principal amount of such 
Collateral Bonds or Substituted Collateral Bonds shall cease to secure the 
Securities in any manner.

          SECTION 5.02.   APPLICATION OF TRUST MONEY.

          Subject to the provisions of the last paragraph of Section 11.08, 
all money deposited with the Trustee pursuant to Section 5.01 shall be held 
in trust and applied by it, in accordance with the provisions of the 
Securities and this Indenture, to the payment, either directly or through any 
Paying Agent (including the Company acting as its own Paying Agent) as the 
Trustee may determine, to the Persons entitled thereto, of the principal (and 
premium, if any) and interest for whose payment such money has been deposited 
with or received by the Trustee.

                                      -47-

                                       
                                   ARTICLE VI

                                    REMEDIES

          SECTION 6.01.   EVENTS OF DEFAULT.

          "EVENT OF DEFAULT," wherever used herein with respect to Securities 
of any series, means any one of the following events (whatever the reason for 
such Event of Default and whether it shall be voluntary or involuntary or to 
be effected by operation of law or pursuant to any judgment, decree or order 
of any court or any order, rule or regulation of any administrative or 
governmental body):

          (1) the Company defaults in the payment of interest on any Security 
     when such interest becomes due and payable and, if such default occurs 
     prior to the Release Date, such default continues for a period of 90 
     days or, if such default occurs on or after the Release Date, such 
     default continues for a period of 30 days; or

          (2) the Company defaults in the payment of the principal of (or 
     premium, if any, on) any Security when the same becomes due and payable 
     at Maturity, upon redemption (including redemptions under Article 
     Twelve), or otherwise; or

          (3) the Company fails to observe or perform any of its other 
     covenants, warranties or agreements in the Securities of that series or 
     this Indenture (other than a covenant, agreement or warranty a default 
     in whose performance or whose breach is elsewhere in this Section 
     specifically dealt with or which has expressly been included in this 
     Indenture solely for the benefit of series of Securities other than that 
     series), and the failure to observe or perform continues for the period 
     and after the notice specified in the last paragraph of this Section; or

          (4) prior to the Release Date, a completed default (as defined in 
     the First Mortgage Indenture under which Collateral Bonds are 
     outstanding) has occurred and is continuing; PROVIDED, HOWEVER, that 
     anything in this Indenture to the contrary notwithstanding, the waiver 
     or cure of such default under the First Mortgage Indenture and the 
     rescission and annulment of the consequences thereof under the First 
     Mortgage Indenture shall constitute a waiver of the corresponding Event 
     of Default hereunder and a rescission and annulment of the consequences 
     thereof hereunder; or

          (5) if any Substituted Collateral Bonds are outstanding, an event 
     of default or completed default (as defined in the Substituted Mortgage 
     Indenture) has occurred and is continuing; PROVIDED, HOWEVER, that 
     anything in this Indenture to the contrary notwithstanding, the waiver 
     or cure of such default under the Substituted Mortgage Indenture and the 
     rescission and annulment of the consequences thereof under the 
     Substituted Mortgage Indenture shall constitute a waiver of the 
     corresponding Event of Default hereunder and a rescission and annulment 
     of the consequences thereof hereunder; or

                                      -48-



          (6) the Company pursuant to or within the meaning of any Bankruptcy 
     Law (A) commences a voluntary case or proceeding under any Bankruptcy 
     Law with respect to itself, (B) consents to the entry of a judgment, 
     decree or order for relief against it in an involuntary case or 
     proceeding under any Bankruptcy Law, (C) consents to or acquiesces in 
     the institution of bankruptcy or insolvency proceedings against it, (D) 
     applies for, consents to or acquiesces in the appointment of or taking 
     possession by a Custodian of the Company or for any material part of its 
     property, (E) makes a general assignment for the benefit of its 
     creditors or (F) takes any corporate action in furtherance of or to 
     facilitate, conditionally or otherwise, any of the foregoing; or

          (7) (i) a court of competent jurisdiction enters a judgment, decree 
     or order for relief in respect of the Company in an involuntary case or 
     proceeding under any Bankruptcy Law which shall (A) approve as properly 
     filed a petition seeking reorganization, arrangement, adjustment or 
     composition in respect of the Company, (B) appoint a Custodian of the 
     Company or for any material part of its property or (C) order the 
     winding-up or liquidation of its affairs, and such judgment, decree or 
     order shall remain unstayed and in effect for a period of 60 consecutive 
     days; or (ii) any bankruptcy or insolvency petition or application is 
     filed, or any bankruptcy or insolvency proceeding is commenced against 
     the Company and such petition, application or proceeding is not 
     dismissed within 60 days; or (iii) a warrant of attachment is issued 
     against any material portion of the property of the Company which is not 
     released within 60 days of service, or

          (8) any other Event of Default provided with respect to Securities 
     of that series.

          A Default under clause (3) above is not an Event of Default until 
the Trustee or the Holders of at least 25% in aggregate principal amount of 
the Outstanding Securities of that series notify the Company of the Default 
and the Company does not cure the Default within 90 days after receipt of the 
notice if such Default occurs prior to the Release Date or within 60 days 
after receipt of the notice if such Default occurs on or after the Release 
Date.  The notice must specify the Default, demand that it be remedied and 
state that the notice is a "Notice of Default."  When a Default under clause 
(3) above is cured within such 90-day period or 60-day period, as applicable, 
it ceases.

          SECTION 6.02.   ACCELERATION OF MATURITY AND RESCISSION.

          If an Event of Default with respect to Securities of any series (other
than an Event of Default specified in clause (6) or (7) of Section 6.01) occurs
and is continuing, the Trustee by notice in writing to the Company, or the
Holders of at least 25% in aggregate principal amount of the Outstanding
Securities of that series by notice in writing to the Company and the Trustee,
may declare the unpaid principal of and accrued interest to the date of
acceleration (or, if the Securities of that series are Original Issue Discount
Securities, such portion of the principal amount as may be specified in the
terms of that series) on all the Outstanding Securities of that series to be due
and payable immediately and, upon any such 

                                      -49-



declaration, the Outstanding Securities of that series (or specified 
principal amount) shall become and be immediately due and payable.  In 
addition, the Trustee shall immediately file with the Mortgage Trustee a 
written demand for redemption of all of the Related Series of Collateral 
Bonds with respect to such series, to the extent provided in the applicable 
provisions of the First Mortgage Indenture, or, if applicable, a written 
demand for redemption of all of the Related Series of Substituted Collateral 
Bonds with respect to such series, pursuant to the applicable provisions of 
the Substituted Mortgage Indenture.

          If an Event of Default specified in clause (6) or (7) of Section 
6.01 occurs, all unpaid principal of and accrued interest on the Outstanding 
Securities of that series (or specified principal amount) shall ipso facto 
become and be immediately due and payable without any declaration or other 
act on the part of the Trustee or any Holder of any Security of that series.  
In addition, the Trustee shall immediately file with the Mortgage Trustee a 
written demand for redemption of all Collateral Bonds pursuant to the 
applicable provisions of the First Mortgage Indenture or, if applicable, a 
written demand for redemption of all Substituted Collateral Bonds pursuant to 
the applicable provisions of the Substituted Mortgage Indenture.

          Upon payment of all such principal and interest, all of the 
Company' obligations under the Securities of that series and (upon payment of 
the Securities of all series) this Indenture shall terminate, except 
obligations under Section 7.07.

          The Holders of not less than a majority in principal amount of the 
Outstanding Securities of that series by notice to the Trustee may rescind an 
acceleration and its consequences (including, if given, the written demand 
for redemption of all Collateral Bonds or, if applicable, all Substituted 
Collateral Bonds), if (i) all existing Events of Default, other than the 
nonpayment of the principal of and interest on the Securities of that series 
that has become due solely by such declaration of acceleration, have been 
cured or waived, (ii) to the extent the payment of such interest is lawful, 
interest on overdue installments of interest and overdue principal that has 
become due otherwise than by such declaration of acceleration have been paid, 
(iii) the rescission would not conflict with any judgment or decree of a 
court of competent jurisdiction and (iv) all payments due to the Trustee and 
any predecessor Trustee under Section 7.07 have been made.

          SECTION 6.03.   COLLECTION OF INDEBTEDNESS AND SUITS FOR ENFORCEMENT
BY TRUSTEE.

          The Company covenants that if:

          (1) default is made in the payment of any interest on any Security 
     when such interest becomes due and payable and, (A) if such default 
     occurs prior to the Release Date, such default continues for a period of 
     90 days, or (B) if such default occurs on or after the Release Date, 
     such default continues for a period of 30 days, or

          (2) default is made in the payment of the principal of (or premium, 
     if any, on) any Security at Maturity, upon redemption (including 
     redemption under Article XII) or otherwise,

                                      -50-


the Company will, upon demand of the Trustee, pay to it, for the benefit of 
the Holders of such Securities, the whole amount then due and payable on such 
Securities for principal (and premium, if any) and interest and, to the 
extent that payment of such interest shall be legally enforceable, interest 
on any overdue principal (and premium, if any) and on any overdue interest, 
at the rate or rates prescribed therefor in such Securities, and, in addition 
thereto, such further amount as shall be sufficient to cover the reasonable 
costs and expenses of collection, including the reasonable compensation, 
expenses, disbursements and advances of the Trustee, its agents and counsel.

          If the Company fails to pay such amounts forthwith upon such 
demand, the Trustee, in its own name and as trustee of an express trust, may 
institute a judicial proceeding for the collection of the sums so due and 
unpaid, may prosecute such proceeding to judgment or final decree and may 
enforce the same against the Company or any other obligor upon such 
Securities and collect the moneys adjudged or decreed to be payable in the 
manner provided by law out of the property of the Company or any other 
obligor upon such Securities, wherever situated.

          If an Event of Default hereunder occurs and is continuing, the 
Trustee may in its discretion proceed to protect and enforce its rights, 
including its rights as holder of the Collateral Bonds or the Substituted 
Collateral Bonds, and the rights of the Holders of Securities by such 
appropriate judicial proceedings as the Trustee shall deem most effectual to 
protect and enforce any such rights, whether for the specific enforcement of 
any covenant or agreement in this Indenture or in aid of the exercise of any 
power granted herein, or to secure any other proper remedy.

          SECTION 6.04.   TRUSTEE MAY FILE PROOFS OF CLAIM.

          In case of the pendency of any receivership, insolvency, 
liquidation, bankruptcy, reorganization, arrangement, adjustment, composition 
or other judicial proceeding relative to the Company or any other obligor 
upon the Securities or the property of the Company or of such other obligor 
or their creditors, the Trustee (irrespective of whether the principal of the 
Securities shall then be due and payable as therein expressed or by 
declaration or otherwise and irrespective of whether the Trustee shall have 
made any demand on the Company for the payment of overdue principal or 
interest) shall be entitled and empowered, by intervention in such proceeding 
or otherwise,

          (i) to file and prove a claim for the whole amount of principal 
     (and premium, if any) and interest owing and unpaid in respect of the 
     Securities and to file such other papers or documents as may be 
     necessary or advisable in order to have the claims of the Trustee 
     (including any claim for the reasonable compensation, expenses, 
     disbursements and advances of the Trustee, its agent and counsel) and of 
     the Holders allowed in such judicial proceedings, and

          (ii) to collect and receive any moneys or other property payable or 
     deliverable on any such claims and to distribute the same; and any 
     custodian, receiver, 

                                      -51-



     assignee, trustee, liquidator, sequestrator or other similar official in 
     any such judicial proceeding is hereby authorized by each Holder to make 
     such payments to the Trustee and, in the event that the Trustee shall 
     consent to the making of such payments directly to the Holders, to pay 
     to the Trustee any amount due it for the reasonable compensation, 
     expenses, disbursements and advances of the Trustee, its agents and 
     counsel, and any other amounts due the Trustee under Section 7.07.

          Nothing herein contained shall be deemed to authorize the Trustee 
to authorize or consent to or accept or adopt on behalf of any Holder any 
plan of reorganization, arrangement, adjustment or composition affecting the 
Securities or the rights of any Holder thereof or to authorize the Trustee to 
vote in respect of the claim of any Holder in any such proceeding.

          SECTION 6.05.   TRUSTEE MAY ENFORCE CLAIMS WITHOUT POSSESSION OF 
SECURITIES.

          All rights of action and claims under this Indenture or the 
Securities may be prosecuted and enforced by the Trustee without the 
possession of any of the Securities or the production thereof in any 
proceeding relating thereto, and any such proceeding instituted by the 
Trustee shall be brought in its own name as trustee of an express trust, and 
any recovery of judgment shall, after provision for the payment of the 
reasonable compensation, expenses, disbursements and advances of the Trustee, 
its agents and counsel, be for the ratable benefit of the Holders of the 
Securities in respect of which such judgment has been recovered.

          SECTION 6.06.   APPLICATION OF MONEY COLLECTED.

          Any money collected by the Trustee pursuant to this Article in 
respect of the Securities of any series shall be applied in the following 
order, at the date or dates fixed by the Trustee and, in case of the 
distribution of such money on account of principal (or premium, if any) or 
interest, upon presentation of the Securities in respect of which moneys have 
been collected and the notation thereon of the payment if only partially paid 
and upon surrender thereof if fully paid:

          First:  To the payment of all amounts due the Trustee under Section 
7.07 applicable to such series;

          Second:  To the payment of the amounts then due and unpaid for 
principal of (and premium, if any) and interest on the Securities of such 
series in respect of which or for the benefit of which such money has been 
collected, ratably, without preference or priority of any kind, according to 
the amounts due and payable on such Securities of such series for principal 
(and premium, if any) and interest, respectively; and

          Third:  To the Company.

          The Trustee may fix a record date and payment date for any payment to
Holders pursuant to this Section 6.06.  At least fifteen (15) days before such
record date, the Trustee 

                                      -52-



shall mail to each Holder and the Company a notice that states the record 
date, the payment date and the amount to be paid.

          SECTION 6.07.   LIMITATION ON SUITS.

          No Holder of any Security of any series shall have any right to 
institute any proceeding, judicial or otherwise, with respect to this 
Indenture, or for the appointment of a receiver or trustee, or for any other 
remedy hereunder, unless:

          (1) such Holder has previously given written notice to the Trustee 
     of a continuing Event of Default with respect to the Securities of that 
     series;

          (2) the Holders of not less than 25% in principal amount of the 
     Outstanding Securities of that series shall have made written request to 
     the Trustee to institute proceedings in respect of such Event of Default 
     in its own name as Trustee hereunder;

          (3) such Holder or Holders have offered to the Trustee reasonable 
     indemnity against the costs, expenses and liabilities to be incurred in 
     compliance with such request;

          (4) the Trustee for 60 days after its receipt of such notice, 
     request and offer of indemnity has failed to institute any such 
     proceeding; and

          (5) no direction inconsistent with such written request has been 
     given to the Trustee during such 60-day period by the Holders of a 
     majority in principal amount of the Outstanding Securities of that 
     series;

it being understood and intended that no one or more of Holders of Securities 
of any series shall have any right in any manner whatever by virtue of, or by 
availing of, any provision of this Indenture to affect, disturb or prejudice 
the rights of any other of such Holders, or to obtain or to seek to obtain 
priority or preference over any other of such Holders or to enforce any right 
under this Indenture, except in the manner herein provided and for the equal 
and ratable benefit of all Holders of Securities of the affected series.

          SECTION 6.08.   UNCONDITIONAL RIGHT OF HOLDERS TO RECEIVE 
PRINCIPAL, PREMIUM AND INTEREST.

          Notwithstanding any other provision in this Indenture, the Holder 
of any Security shall have the right, which is absolute and unconditional, to 
receive payment of the principal of (and premium, if any) and (subject to 
Section 3.07) interest on such Security on the Stated Maturity or Maturities 
expressed in such Security (or, in the case of redemption, on the Redemption 
Date) and to institute suit for the enforcement of any such payment, and such 
rights shall not be impaired without the consent of such Holder.

                                      -53-


          SECTION 6.09.   RESTORATION OF RIGHTS AND REMEDIES.

          If the Trustee or any Holder has instituted any proceeding to 
enforce any right or remedy under this Indenture and such proceeding has been 
discontinued or abandoned for any reason, or has been determined adversely to 
the Trustee or to such Holder, then and in every such case, subject to any 
determination in such proceeding, the Company, the Trustee and the Holders 
shall be restored severally and respectively to their former positions 
hereunder and thereafter all rights and remedies of the Trustee and the 
Holders shall continue as though no such proceeding has been instituted.

          SECTION 6.10.   RIGHTS AND REMEDIES CUMULATIVE.

          Except as otherwise provided with respect to the replacement or 
payment of mutilated, destroyed, lost or stolen Securities in the last 
paragraph of Section 3.06, no right or remedy herein conferred upon or 
reserved to the Trustee or to the Holders is intended to be exclusive of any 
other right or remedy, and every right and remedy shall, to the extent 
permitted by law, be cumulative and in addition to every other right and 
remedy given hereunder or now or hereafter existing at law or in equity or 
otherwise.  The assertion or employment of any right or remedy hereunder, or 
otherwise, shall not prevent the concurrent assertion or employment of any 
other appropriate right or remedy.

          SECTION 6.11.   DELAY OR OMISSION NOT WAIVER.

          No delay or omission of the Trustee or of any Holder of any 
Securities to exercise any right or remedy accruing upon any Event of Default 
shall impair any such right or remedy or constitute a waiver of any such 
Event of Default or an acquiescence therein.  Every right and remedy given by 
this Article or by law to the Trustee or to the Holders may be exercised from 
time to time, and as often as may be deemed expedient, by the Trustee or by 
the Holders, as the case may be.

          SECTION 6.12.   CONTROL BY HOLDERS.

          The Holders of a majority in principal amount of the Outstanding 
Securities of any series shall have the right to direct the time, method and 
place of conducting any proceeding for any remedy available to the Trustee, 
or exercising any trust or power conferred on the Trustee, with respect to 
the Securities of such series, provided that:

          (1) such direction shall not be in conflict with any rule of law or 
     with this Indenture;

          (2) the Trustee may take any other action deemed proper by the 
     Trustee which is not inconsistent with such direction; and

          (3) subject to Section 7.01, the Trustee need not take any action 
     which might involve the Trustee in personal liability or be unduly 
     prejudicial to the Holders not joining therein.

                                      -54-



          SECTION 6.13.   WAIVER OF PAST DEFAULTS.

          The Holders of not less than a majority in principal amount of the 
Outstanding Securities of any series may by written notice to the Trustee on 
behalf of the Holders of all the Securities of such series waive any Default 
or Event of Default with respect to such series and its consequences, except 
a Default or Event of Default

          (1) in respect of the payment of the principal of (or premium, if any)
     or interest on any Security of such series, or

          (2) in respect of a covenant or other provision hereof which under 
     Article Ten cannot be modified or amended without the consent of the 
     Holder of each Outstanding Security of such series affected.

          Upon any such waiver, such Default or Event of Default shall cease 
to exist and shall be deemed to have been cured, for every purpose of this 
Indenture and the Securities of such series; but no such waiver shall extend 
to any subsequent or other Default or Event of Default or impair any right 
consequent thereon.

          SECTION 6.14.   UNDERTAKING FOR COSTS.

          All parties to this Indenture agree, and each Holder of any 
Security by his acceptance thereof shall be deemed to have agreed, that any 
court may in its discretion require, in any suit for the enforcement of any 
right or remedy under this Indenture, or in any suit against the Trustee for 
any action taken, suffered or omitted by it as Trustee, the filing by any 
party litigant in such suit of an undertaking to pay the costs of such suit, 
and that such court may in its discretion assess reasonable costs, including 
reasonable attorneys' fees, against any party litigant in such suit, having 
due regard to the merits and good faith of the claims or defenses made by 
such party litigant; but the provisions of this Section shall not apply to 
any suit instituted by the Company, to any suit instituted by the Trustee, to 
any suit instituted by any Holder, or group of Holders, holding in the 
aggregate more than 10% in principal amount of the Outstanding Securities of 
any series, or to any suit instituted by any Holder for the enforcement of 
the payment of the principal of (or premium, if any) or interest on any 
Security on or after the Stated Maturity or Maturities expressed in such 
Security (or, in the case of redemption, on or after the Redemption Date).

          SECTION 6.15.   DEFAULTS UNDER FIRST MORTGAGE INDENTURE OR 
SUBSTITUTED MORTGAGE INDENTURE.

          In addition to every other right and remedy provided herein, the 
Trustee may exercise any right or remedy available to the Trustee in its 
capacity as owner and holder of Collateral Bonds or Substituted Collateral 
Bonds which arises as a result of a default under the First Mortgage 
Indenture or the Substituted Mortgage Indenture.

                                      -55-

                                       
                                  ARTICLE VII

                                  THE TRUSTEE

          SECTION 7.01.   CERTAIN DUTIES AND RESPONSIBILITIES OF THE TRUSTEE.

          (a) Except during the continuance of an Event of Default, the 
Trustee's duties and responsibilities under this Indenture shall be governed 
by Section 315 (a) of the Trust Indenture Act.

          (b) In case an Event of Default has occurred and is continuing, and 
is known to the Trustee, the Trustee shall exercise the rights and powers 
vested in it by this Indenture, and shall use the same degree of care and 
skill in their exercise, as a prudent man would exercise or use under the 
circumstances in the conduct of his own affairs.

          (c) None of the provisions of Section 315 (d) of the Trust 
Indenture Act shall be excluded from this Indenture.

          SECTION 7.02.   NOTICE OF DEFAULTS.

          Within 30 days after the occurrence of any Default or Event of 
Default with respect to the Securities of any series, the Trustee shall give 
to all Holders of Securities of such series, as their names and addresses 
appear in the Security Register, notice of such Default or Event of Default 
known to the Trustee, unless such Default or Event of Default shall have been 
cured or waived; provided, however, that, except in the case of a Default or 
Event of Default in the payment of the principal of (or premium, if any) or 
interest on any Security of such series or in the payment of any sinking fund 
installment with respect to Securities of such series, the Trustee shall be 
protected in withholding such notice if and so long as the board of 
directors, the executive committee or a trust committee of directors and/or 
Responsible Officers of the Trustee in good faith determine that the 
withholding of such notice is in the interest of the Holders of Securities of 
such series.

          SECTION 7.03.   CERTAIN RIGHTS OF TRUSTEE.

          Subject to the provisions of the Trust Indenture Act:

          (a) the Trustee may rely and shall be protected in acting or 
refraining from acting upon any resolution, certificate, statement, 
instrument, opinion, report, notice, request, direction, consent, order, 
bond, debenture, note, other evidence of indebtedness or other paper or 
document believed by it to be genuine and to have been signed or presented by 
the proper party or parties;

          (b) any request or direction of the Company mentioned herein shall 
be sufficiently evidenced by a Company Request or Company Order and any 
resolution of the Board of Directors may be sufficiently evidenced by a Board 
Resolution;

                                      -56-


          (c) whenever in the administration of this Indenture the Trustee 
shall deem it desirable that a matter be proved or established prior to 
taking, suffering or omitting any action hereunder, the Trustee (unless other 
evidence be herein specifically prescribed) may, in the absence of bad faith 
on its part, rely upon an Officer's Certificate;

          (d) the Trustee may consult with counsel and the written advice of 
such counsel or any Opinion of Counsel shall be full and complete 
authorization and protection in respect of any action taken, suffered or 
omitted by it hereunder in good faith and in reliance thereon;

          (e) the Trustee shall be under no obligation to exercise any of the 
rights or powers vested in it by this Indenture at the request or direction 
of any of the Holders pursuant to this Indenture, unless such Holders shall 
have offered to the Trustee security or indemnity to its reasonable 
satisfaction against the costs, expenses and liabilities which might be 
incurred by it in compliance with such request or direction;

          (f) prior to the occurrence of an Event of Default with respect to 
the Securities of any series and after the curing or waiving of all such 
Events of Default which may have occurred, the Trustee shall not be bound to 
make any investigation into the facts or matters stated in any resolution, 
certificate, statement, instrument, opinion, report, notice, request, 
direction, consent, order, approval or other paper or document, or the books 
and records of the Company, unless requested in writing to do so by the 
Holders of a majority in principal amount of the outstanding Securities of 
any series; provided, however, that if the payment within a reasonable time 
to the Trustee of the costs, expenses or liabilities likely to be incurred by 
it in the making of such investigation is not, in the opinion of the Trustee, 
reasonably assured to the Trustee by the security afforded to it by the terms 
of this Indenture, the Trustee may require reasonable indemnity against such 
costs, expenses or liabilities as a condition to so proceeding; the 
reasonable expense of every such investigation shall be paid by the Company 
or, if paid by the Trustee, shall be repaid by the Company upon demand;

          (g) the Trustee may execute any of the trusts or powers hereunder 
or perform any duties hereunder either directly or by or through agents or 
attorneys and the Trustee shall not be responsible for any misconduct or 
negligence on the part of any agent or attorney appointed with due care by it 
hereunder; and

          SECTION 7.04.   NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF 
SECURITIES.

          The recitals herein and in the Securities, except the Trustee's 
certificates of authentication, shall be taken as the statements of the 
Company, and the Trustee or any Authenticating Agent assumes no 
responsibility for their correctness.  The Trustee makes no representations 
as to the validity or sufficiency of this Indenture or of the Securities.  
Neither the Trustee nor any Authenticating Agent shall be accountable for the 
use or application by the Company of Securities or the proceeds thereof.

                                      -57-


          SECTION 7.05.   MAY HOLD SECURITIES.

          The Trustee, any Authenticating Agent, any Paying Agent, any 
Security Registrar or any other agent of the Company, in its individual or 
any other capacity, may become the owner or pledgee of Securities and, 
subject to Sections 7.08 and 7.13, may otherwise deal with the Company with 
the same rights it would have if it were not Trustee, Authenticating Agent, 
Paying Agent, Security Registrar or such other agent.

          SECTION 7.06.   MONEY HELD IN TRUST.

          Money held by the Trustee in trust hereunder (including amounts 
held by the Trustee as Paying Agent) need not be segregated from other funds 
except to the extent required by law.  The Trustee may allow and credit the 
Company interest on any money received by it hereunder at such rate, if any, 
as may be agreed upon by the Company and the Trustee from time to time as may 
be permitted by law.

          SECTION 7.07.   COMPENSATION AND REIMBURSEMENT.

          The Company agrees

          (1) to pay to the Trustee from time to time reasonable compensation 
     for all services rendered by it hereunder (which compensation shall not 
     be limited by any provision of law in regard to the compensation of a 
     trustee of an express trust);

          (2) except as otherwise expressly provided herein, to reimburse the 
     Trustee upon its request for all reasonable expenses, disbursements and 
     advances incurred or made by the Trustee in accordance with any 
     provision of this Indenture (including the reasonable compensation and 
     the expenses and disbursements of its agents and counsel), except any 
     such expense, disbursement or advance as may be attributable to its 
     negligence or bad faith; and

          (3) to indemnify the Trustee for, and to hold it harmless against, 
     any loss, liability, damage, claim or expense, including taxes (other 
     than taxes based upon or determined or measured by the income of the 
     Trustee), incurred without negligence or bad faith on its part, arising 
     out of or in connection with the acceptance or administration of the 
     trust or trusts hereunder, including the costs and expenses of defending 
     itself against any claim or liability in connection with the exercise or 
     performance of any of its powers or duties hereunder.

          When the Trustee incurs expenses or renders services in connection 
with an Event of Default specified in Section 6.01(6) or Section 6.01(7), the 
expenses (including the reasonable charges and expenses of its counsel) and 
the compensation for the services are intended to constitute expenses of 
administration under any applicable federal or state bankruptcy, insolvency 
or other similar law.

          The provisions of this Section 7.07 shall survive this Indenture.

                                      -58-


          SECTION 7.08.   DISQUALIFICATION; CONFLICTING INTERESTS.

          The Trustee shall be disqualified only where such disqualification 
is required by Section 310(b) of the Trust Indenture Act, provided that, to 
the extent permitted by law, Firstar Bank Milwaukee, N.A., National 
Association, shall not be deemed to have a conflicting interest for purposes 
of Section 310(b) of the Trust Indenture Act because of its capacity as 
trustee under the First Mortgage Indenture or the Substituted Mortgage 
Indenture.  Nothing shall prevent the Trustee from filing with the Commission 
the application referred to in the second to last paragraph of Section 310(b) 
of the Trust Indenture Act.

          SECTION 7.09.   CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

          There shall at all times be a Trustee hereunder which shall be 
eligible to act as Trustee under Section 310(a) (1) of the Trust Indenture 
Act having a combined capital and surplus of at least $50,000,000 subject to 
supervision or examination by federal or State authority.  If such 
corporation publishes reports of condition at least annually, pursuant to law 
or to the requirements of said supervising or examining authority, then for 
the purposes of this Section, the combined capital and surplus of such 
corporation shall be deemed to be its combined capital and surplus as set 
forth in its most recent report of condition so published.  Neither the 
Company nor any Person directly or indirectly controlling, controlled by, or 
under common control with the Company may serve as Trustee.  If at any time 
the Trustee shall cease to be eligible in accordance with the provisions of 
this Section, it shall resign immediately in the manner and with the effect 
hereinafter specified in this Article.

          SECTION 7.10.   RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.

          (a) No resignation or removal of the Trustee and no appointment of 
a successor Trustee pursuant to this Article shall become effective until the 
acceptance of appointment by the successor Trustee in accordance with the 
applicable requirements of Section 7.11.

          (b) The Trustee may resign at any time with respect to the 
Securities of one or more series by giving written notice thereof to the 
Company.  If the instrument of acceptance by a successor Trustee required by 
Section 7.11 shall not have been delivered to the Trustee within 30 days 
after the giving of such notice of resignation, the resigning Trustee may 
petition any court of competent jurisdiction for the appointment of a 
successor Trustee with respect to the Securities of such series.

          (c) The Trustee may be removed at any time with respect to the 
Securities of any series by Act of the Holders of a majority in principal 
amount of the Outstanding Securities of such series, delivered to the Trustee 
and to the Company.

          (d) If at any time:

          (1) the Trustee shall fail to comply with Section 310(b) of the 
     Trust Indenture Act after written request therefor by the Company or by 
     any Holder who has been a bona fide Holder of a Security for at least 
     six months; or

                                      -59-



          (2) the Trustee shall cease to be eligible under Section 7.09 and 
     shall fail to resign after written request therefor by the Company or by 
     any such Holder of a Security who has been a bona fide Holder of a 
     Security for at least six months; or

          (3) the Trustee shall become incapable of acting or shall be 
     adjudged a bankrupt or insolvent or a receiver of the Trustee or of its 
     property shall be appointed or any public officer shall take charge or 
     control of the Trustee or of its property or affairs for the purpose of 
     rehabilitation, conservation or liquidation;

then, in any such case, (i) the Company by a Board Resolution may remove the 
Trustee with respect to all Securities, or (ii) subject to Section 315(e) of 
the Trust Indenture Act, any Holder who has been a bona fide Holder of a 
Security for at least six months may, on behalf of himself and all others 
similarly situated, petition any court of competent jurisdiction for the 
removal of the Trustee with respect to all Securities and the appointment of 
a successor Trustee or Trustees.

          (e) If the Trustee shall resign, be removed or become incapable of 
acting, or if a vacancy shall occur in the office of Trustee for any cause, 
with respect to the Securities of one or more series, the Company, by a Board 
Resolution, shall promptly appoint a successor Trustee or Trustees with 
respect to the Securities of that or those series (it being understood that 
any such successor Trustee may be appointed with respect to the Securities of 
one or more or all of such series and that at any time there shall be only 
one Trustee with respect to the Securities of any particular series) and 
shall comply with the applicable requirements of Section 7.11.  If, within 
one year after such resignation, removal or incapability, or the occurrence 
of such vacancy, a successor Trustee with respect to the Securities of any 
series shall be appointed by Act of the Holders of a majority in principal 
amount of the Outstanding Securities of such series delivered to the Company 
and the retiring Trustee, the successor Trustee so appointed shall, forthwith 
upon its acceptance of such appointment in accordance with the applicable 
requirements of Section 7.11, become the successor Trustee with respect to 
the Securities of such series and to that extent supersede the successor 
Trustee appointed by the Company with respect to such Securities.  If no 
successor Trustee with respect to the Securities of any series shall have 
been so appointed by the Company or the Holders and accepted appointment in 
the manner required by Section 7.11, any Holder who has been a bona fide 
Holder of a Security of such series for at least six months may, on behalf of 
himself and all others similarly situated, petition any court of competent 
jurisdiction for the appointment of a successor Trustee with respect to the 
Securities of such series.

          (f) The Company shall give notice of each resignation and each 
removal of the Trustee with respect to the Securities of any series and each 
appointment of a successor Trustee with respect to the Securities of any 
series by mailing written notice of such event by first-class mail, postage 
prepaid, to all Holders of Securities of such series as their names and 
addresses appear in the Security Register.  Each notice shall include the 
name of the successor Trustee with respect to the Securities of such series 
and the address of its Corporate Trust Office.

                                      -60-


          SECTION 7.11.   ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

          (a) In case of the appointment hereunder of a successor Trustee 
with respect to all Securities, every such successor Trustee so appointed 
shall execute, acknowledge and deliver to the Company and to the retiring 
Trustee an instrument accepting such appointment, and thereupon the 
resignation or removal of the retiring Trustee shall become effective and 
such successor Trustee, without any further act, deed or conveyance, shall 
become vested with all the rights, powers, trusts and duties of the retiring 
Trustee; but, on the request of the Company or the successor Trustee, such 
retiring Trustee shall, upon payment of its charges, execute and deliver an 
instrument transferring to such successor Trustee all the rights, powers and 
trusts of the retiring Trustee and shall duly assign, transfer and deliver to 
such successor Trustee all property and money held by such retiring Trustee 
hereunder.

          (b) In case of the appointment hereunder of a successor Trustee 
with respect to the Securities of one or more (but not all) series, the 
Company, the retiring Trustee and each successor Trustee with respect to the 
Securities of one or more series shall execute and deliver an indenture 
supplemental hereto wherein each successor Trustee shall accept such 
appointment and which (1) shall contain such provisions as shall be necessary 
or desirable to transfer and confirm to, and to vest in, each successor 
Trustee all the rights, powers, trusts and duties of the retiring Trustee 
with respect to the Securities of that or those series to which the 
appointment of such successor Trustee relates, (2) if the retiring Trustee is 
not retiring with respect to all Securities, shall contain such provisions as 
shall be deemed necessary or desirable to confirm that all the rights, 
powers, trusts and duties of the retiring Trustee with respect to the 
Securities of that or those series as to which the retiring Trustee is not 
retiring shall continue to be vested in the retiring Trustee, and (3) shall 
add to or change any of the provisions of this Indenture as shall be 
necessary to provide for or facilitate the administration of the trusts 
hereunder by more than one Trustee, it being understood that nothing herein 
or in such supplemental indenture shall constitute such Trustees co-trustees 
of the same trust and that each such Trustee shall be trustee of a trust or 
trusts hereunder separate and apart from any trust or trusts hereunder 
administered by any other such Trustee; and upon the execution and delivery 
of such supplemental indenture, the resignation or removal of the retiring 
Trustee shall become effective to the extent provided therein and each such 
successor Trustee, without any further act, deed or conveyance, shall become 
vested with all the rights, powers, trusts and duties of the retiring Trustee 
with respect to the Securities of that or those series to which the 
appointment of such successor Trustee relates; but, on request of the Company 
or any successor Trustee, such retiring Trustee shall duly assign, transfer 
and deliver to such successor Trustee all property and money held by such 
retiring Trustee hereunder with respect to the Securities of that or those 
series to which the appointment of such successor Trustee relates.

          (c) Upon request of any such successor Trustee, the Company shall 
execute any and all instruments for more fully and certainly vesting in and 
confirming to such successor Trustee all such rights, powers and trusts 
referred to in paragraph (a) or (b) of this Section, as the case may be.

                                      -61-


          (d) No successor Trustee shall accept its appointment unless at the 
time of such acceptance such successor Trustee shall be qualified and 
eligible under the Trust Indenture Act.

          SECTION 7.12.   MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO
BUSINESS.

          Any corporation into which the Trustee may be merged or converted 
or with which it may be consolidated, or any corporation resulting from any 
merger, conversion or consolidation to which the Trustee shall be a party, or 
any corporation succeeding to all or substantially all the corporate trust 
business of the Trustee, shall be the successor of the Trustee hereunder, 
provided such corporation shall be otherwise qualified and eligible under 
this Article, without the execution or filing of any paper or any further act 
on the part of any of the parties hereto.  In case any Securities shall have 
been authenticated, but not delivered, by the Trustee then in office, any 
successor by merger, conversion or consolidation to such authenticating 
Trustee may adopt such authentication and deliver the Securities so 
authenticated with the same effect as if such successor Trustee had itself 
authenticated such Securities.

          SECTION 7.13.   PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.

          The Trustee shall comply with Section 311(a) of the Trust Indenture 
Act, excluding any creditor relationship listed in Section 311(b) of the 
Trust Indenture Act.  A Trustee who has resigned or been removed shall be 
subject to Section 311(a) of the Trust Indenture Act to the extent indicated 
therein.

          SECTION 7.14.   APPOINTMENT OF AUTHENTICATING AGENT.

          At any time when any of the Securities remain Outstanding the 
Trustee may appoint an Authenticating Agent or Agents with respect to one or 
more series of Securities which shall be authorized to act on behalf of, and 
subject to the direction of, the Trustee to authenticate Securities of such 
series issued upon exchange, registration of transfer or partial redemption 
thereof or pursuant to Section 3.06, and Securities so authenticated shall be 
entitled to the benefits of this Indenture and shall be valid and obligatory 
for all purposes as if authenticated by the Trustee hereunder.  Wherever 
reference is made in this Indenture to the authentication and delivery of 
Securities by the Trustee or the Trustee's certificate of authentication, 
such reference shall be deemed to include authentication and delivery on 
behalf of the Trustee by an Authenticating Agent and a certificate of 
authentication executed on behalf of the Trustee by an Authenticating Agent.  
Each Authenticating Agent shall be acceptable to the Company and shall at all 
times be a corporation organized and doing business under the laws of the 
United States of America, any State thereof or the District of Columbia, 
authorized under such laws to act as Authenticating Agent, having a combined 
capital and surplus of not less than $50,000,000 and subject to supervision 
or examination by federal or State authority.  If such Authenticating Agent 
publishes reports of condition at least annually, pursuant to law or to the 
requirements of said supervising or examining authority, then for the 
purposes of this Section, the combined capital and surplus of such 
Authenticating Agent shall be deemed to be 

                                      -62-



its combined capital and surplus as set forth in its most recent report of 
condition so published.  If at any time an Authenticating Agent shall cease 
to be eligible in accordance with the provisions of this Section, such 
Authenticating Agent shall resign immediately in the manner and with the 
effect specified in this Section.

          Any corporation into which an Authenticating Agent may be merged or 
converted or with which it may be consolidated, or any corporation resulting 
from any merger, conversion or consolidation to which such Authenticating 
Agent shall be a party, or any corporation succeeding to the corporate agency 
or corporate trust business of an Authenticating Agent, shall continue to be 
an Authenticating Agent, provided such corporation shall be otherwise 
eligible under this Section, without the execution or filing of any paper or 
any further act on the part of the Trustee or the Authenticating Agent.

          An Authenticating Agent may resign at any time by giving written 
notice thereof to the Trustee and to the Company.  The Trustee may at any 
time terminate the agency of an Authenticating Agent by giving written notice 
thereof to such Authenticating Agent and to the Company.  Upon receiving such 
a notice of resignation or upon such a termination, or in case at any time 
such Authenticating Agent shall cease to be eligible in accordance with the 
provisions of this Section, the Trustee may appoint a successor 
Authenticating Agent which shall be acceptable to the Company and shall mail 
written notice of such appointment by first-class mail, postage prepaid, to 
all Holders of Securities of the series with respect to which such 
Authenticating Agent will serve, as their names and addresses appear in the 
Security Register.  Any successor Authenticating Agent upon acceptance of its 
appointment hereunder shall become vested with all the rights, powers and 
duties of its predecessor hereunder, with like effect as if originally named 
as an Authenticating Agent. No successor Authenticating Agent shall be 
appointed unless eligible under the provisions of this Section.

          The Company agrees to pay to each Authenticating Agent from time to 
time reasonable compensation for its services under this Section.

          If an appointment with respect to one or more series is made 
pursuant to this Section, the Securities of such series may have endorsed 
thereon, in addition to the Trustee's certificate of authentication, an 
alternate certificate of authentication in the following form:

                         Form of Authenticating Agent's
                         Certificate of Authentication

Dated:
       ---------------

                                      -63-


          This is one of the Securities of the series designated therein 
referred to in the within-mentioned Indenture.

                                              ---------------------------------
                                                                    As Trustee

                                              By
                                                 ------------------------------
                                                        As Authenticating Agent


                                              By
                                                 ------------------------------
                                                           Authorized Signatory


                                      -64-

                                       
                                  ARTICLE VIII

                 HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

          SECTION 8.01.   COMPANY TO FURNISH TRUSTEE NAMES AND ADDRESSES OF
HOLDERS.

          The Company will furnish or cause to be furnished to the Trustee:

          (a) semi-annually, not later than January 1 and July 1 in each 
year, a list, in such form as the Trustee may reasonably require, of the 
names and addresses of the Holders as of the preceding December 15 or June 
15, as the case may be; and

          (b) at such other times as the Trustee may request in writing, 
within 30 days after the receipt by the Company of any such request, a list 
of similar form and content as of a date not more than 15 days prior to the 
time such list is furnished;

provided, however, that so long as the Trustee is the Security Registrar, no 
such list shall be required to be furnished.

          SECTION 8.02.   PRESERVATION OF INFORMATION; COMMUNICATIONS TO 
HOLDERS.

          (a) The Trustee shall preserve, in as current a form as is 
reasonably practicable, the names and addresses of Holders contained in the 
most recent list furnished to the Trustee as provided in Section 8.01 and the 
names and addresses of Holders received by the Trustee in its capacity as 
Security Registrar.  The Trustee may destroy any list furnished to it as 
provided in Section 8.02 upon receipt of a new list so furnished.

          (b) If three or more Holders (herein referred to as "applicants") 
apply in writing to the Trustee, and furnish to the Trustee reasonable proof 
that each such applicant has owned a Security for a period of at least six 
months preceding the date of such application, and such application states 
that the applicants desire to communicate with other Holders with respect to 
their rights under this Indenture or under the Securities and is accompanied 
by a copy of the form of proxy or other communication which such applicants 
propose to transmit, then the Trustee shall, within five Business Days after 
the receipt of such application, at its election, either

          (i) afford such applicants access to the information preserved at 
     the time by the Trustee in accordance with Section 8.02(a); or

          (ii) inform such applicants as to the approximate number of Holders 
     whose names and addresses appear in the information preserved at the 
     time by the Trustee in accordance with Section 8.02 (a), and as to the 
     approximate cost of mailing to such Holders the form of proxy or other 
     communication, if any, specified in such application.

                                      -65-


          If the Trustee shall elect not to afford such applicants access to 
such information, the Trustee shall, upon the written request of such 
applicants, mail to each Holder whose name and address appears in the 
information preserved at the time by the Trustee in accordance with Section 
8.02 (a) a copy of the form of proxy or other communication which is 
specified in such request, with reasonable promptness after a tender to the 
Trustee of the material to be mailed and of payment, or provision for the 
payment, of the reasonable expenses of mailing, unless within five days after 
such tender the Trustee shall mail to such applicants and file with the 
Commission, together with a copy of the material to be mailed, a written 
statement to the effect that, in the opinion of the Trustee, such mailing 
would be contrary to the best interest of the Holders or would be in 
violation of applicable law.  Such written statement shall specify the basis 
of such opinion.  If the Commission, after opportunity for a hearing upon the 
objections specified in the written statement so filed, shall enter an order 
refusing to sustain any of such objections or if, after the entry of an order 
sustaining one or more of such objections, the Commission shall find, after 
notice and opportunity for hearing, that all objections so sustained have 
been met and shall enter an order so declaring, the Trustee shall mail copies 
of such material to all such Holders with reasonable promptness after the 
entry of such order and the renewal of such tender; otherwise the Trustee 
shall be relieved of any obligation or duty to such applicants respecting 
their application.

          (c) Every Holder of Securities, by receiving and holding the same, 
agrees with the Company and the Trustee that neither the company nor the 
Trustee nor any agent of either of them shall be held accountable by reason 
of the disclosure of any such information as to the names and addresses of 
the Holders in accordance with Section 8.02(b), regardless of the source from 
which such information was derived, and that the Trustee shall not be held 
accountable by reason of mailing any material pursuant to a request made 
under Section 8.02(b).

          SECTION 8.03.   REPORTS BY TRUSTEE.

          (a) Within 60 days after May 15 of each year commencing with the 
year 1999, the Trustee shall transmit by mail to all Holders of Securities as 
provided in Section 313(c) of the Trust Indenture Act, a brief report dated 
as of May 15, if required by and in compliance with Section 313(a) of the 
Trust Indenture Act.

          (b) The Trustee shall from time to time transmit by mail to all 
Holders of Securities as provided in Section 313(c) of the Trust Indenture 
Act brief reports that comply, both as to content and date of delivery, with 
Section 313(b) of the Trust Indenture Act (to the extent required by such 
Section).

          (c) A copy of each such report shall, at the time of such 
transmission to Holders, be filed by the Trustee with each stock exchange 
upon which any Securities are listed, with the Commission and with the 
Company.  The Company will notify the Trustee when any Securities are listed 
on any stock exchange.

                                      -66-


          SECTION 8.04.   REPORTS BY COMPANY.

          The Company shall:

          (1) file with the Trustee, within 30 days after the Company is 
     required to file the same with the Commission, copies of the annual 
     reports and of the information, documents and other reports (or copies 
     of such portions of any of the foregoing as the Commission may from time 
     to time by rules and regulations prescribe) which the Company may be 
     required to file with the Commission pursuant to Section 13 or Section 
     15(d) of the Exchange Act; or, if the Company is not required to file 
     information, documents or reports pursuant to either of said Sections, 
     then it shall file with the Trustee and the Commission, in accordance 
     with rules and regulations prescribed from time to time by the 
     Commission, such of the supplementary and periodic information, 
     documents and reports which may be required pursuant to Section 13 of 
     the Exchange Act in respect of a security listed and registered on a 
     national securities exchange as may be prescribed from time to time in 
     such rules and regulations;

          (2) file with the Trustee and the Commission, in accordance with 
     rules and regulations prescribed from time to time by the Commission, 
     such additional information, documents and reports with respect to 
     compliance by the Company with the conditions and covenants of this 
     Indenture as may be required from time to time by such rules and 
     regulations;

          (3) transmit by mail to all Holders, as their names and addresses 
     appear in the Security Register, within 30 days after the filing thereof 
     with the Trustee, such summaries of any information, documents and 
     reports required to be filed by the Company pursuant to paragraphs (1) 
     and (2) of this Section as may be required by rules and regulations 
     prescribed from time to time by the Commission; and

          (4) furnish to the Trustee, on or before May 1 of each year, a 
     brief certificate from the principal executive officer, principal 
     financial officer or principal accounting officer as to his or her 
     knowledge of the Company's compliance with all conditions and covenants 
     under this Indenture.  For purposes of this paragraph, such compliance 
     shall be determined without regard to any period of grace or requirement 
     of notice provided under this Indenture.  Such certificate need not 
     comply with Section 1.02.

                                      -67-


                                    ARTICLE IX

                  CONSOLIDATION, MERGER, LEASE, SALE OR TRANSFER

          SECTION 9.01.   THEN COMPANY MAY MERGE, ETC.

          The Company shall not consolidate with, or merge with or into any
other corporation (whether or not the Company shall be the surviving
corporation), or sell, assign, transfer or lease all or substantially all of its
properties and assets as an entirety or substantially as an entirety to any
Person or group of affiliated Persons, in one transaction or a series of related
transactions, unless:

          (1) either the Company shall be the continuing Person or the Person 
     (if other than the Company) formed by such consolidation or with which 
     or into which the Company is merged or the Person (or group of 
     affiliated Persons) to which all or substantially all the properties and 
     assets of the Company as an entirety or substantially as an entirety are 
     sold, assigned, transferred or leased shall be a corporation (or 
     constitute corporations) and shall expressly assume, by an indenture 
     supplemental hereto, executed and delivered to the Trustee, in form 
     satisfactory to the Trustee, all the obligations of the Company under 
     the Securities and this Indenture and, if prior to the Release Date, 
     shall expressly assume, by an indenture supplemental to the Mortgage 
     Indenture or, if on or after the Release Date, by an indenture 
     supplemental to any Substituted Mortgage Indenture, all of the 
     obligations of the Company under any outstanding Collateral Bonds or 
     Substituted Collateral Bonds and under the Mortgage Indenture or any 
     Substituted Mortgage Indenture, executed and delivered to the Mortgage 
     Trustee or the trustee under any Substituted Mortgage Indenture, as the 
     case may be, in form satisfactory to the Mortgage Trustee or the trustee 
     under the Substituted Mortgage Indenture; and

          (2) immediately before and after giving effect to such transaction 
     or series of related transactions, no Event of Default, and no Default, 
     shall have occurred and be continuing.

          SECTION 9.02.   OPINION OF COUNSEL.

          The Company shall deliver to the Trustee prior to the proposed
transaction(s) covered by Section 9.01 an Officer's Certificate and an Opinion
of Counsel stating that the transaction(s) and such supplemental indenture
comply with this Indenture and that all conditions precedent to the consummation
of the transaction(s) under this Indenture have been met.

          SECTION 9.03.   SUCCESSOR CORPORATION SUBSTITUTED.

          Upon any consolidation by the Company with or merger by the Company
into any other corporation or any lease, sale, assignment, or transfer of all or
substantially all of the property and assets of the Company in accordance with
Section 9.01, the successor corporation 

                                      -68-


formed by such consolidation or into which the Company is merged or the 
successor corporation or affiliated group of corporations to which such 
lease, sale, assignment, or transfer is made shall succeed to, and be 
substituted for, and may exercise every right and power of, the Company under 
this Indenture with the same effect as if such successor corporation or 
corporations had been named as the Company herein, and thereafter, except in 
the case of a lease, the predecessor corporation or corporations shall be 
relieved of all obligations and covenants under this Indenture and the 
Securities and in the event of such conveyance or transfer, except in the 
case of a lease, any such predecessor corporation may be dissolved and 
liquidated.


                                      -69-


                                  ARTICLE X

                           SUPPLEMENTAL INDENTURES

          SECTION 10.01.  SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS.

          Without notice to or the consent of any Holders, the Company, when 
authorized by a Board Resolution, and the Trustee, at any time and from time 
to time, may enter into one or more indentures supplemental hereto, in form 
satisfactory to the Trustee, for any of the following purposes:

          (1) to evidence the succession of another corporation to the 
     Company and the assumption by any such successor of the covenants of the 
     Company herein and in the Securities; or

          (2) to add to the covenants of the Company for the benefit of the 
     Holders of all or any series of Securities (and if such covenants are to 
     be for the benefit of less than all series of Securities, stating that 
     such covenants are expressly being included solely for the benefit of 
     such series) or to surrender any right or power herein conferred upon 
     the Company; or

          (3) to add any additional Events of Default with respect to all or 
     any series of Securities; or

          (4) to add or change any of the provisions of this Indenture to 
     such extent as shall be necessary to permit or facilitate the issuance 
     of Securities in bearer form, registrable or not registrable as to 
     principal, and with or without interest coupons; or

          (5) to change or eliminate any of the provisions of this Indenture, 
     provided that any such change or elimination shall become effective only 
     when there is no Security Outstanding of any series created prior to the 
     execution of such supplemental indenture which is entitled to the 
     benefit of such provision; or

          (6) to establish the form or terms of Securities of any series as 
     permitted by Sections 2.01 and 3.01; or

          (7) to evidence and provide for the acceptance of appointment 
     hereunder by a successor Trustee with respect to the Securities of one 
     or more series and to add to or change any of the provisions of this 
     Indenture as shall be necessary to provide for or facilitate the 
     administration of the trusts hereunder by more than one Trustee, 
     pursuant to the requirements of Section 7.11(b); or

          (8) to cure any ambiguity, defect or inconsistency or to correct or 
     supplement any provision herein which may be inconsistent with any other 
     provision herein; or

                                      -70-


          (9) to make any change that does not materially adversely affect 
     the interests of the Holders of Securities of any series.

          Upon request of the Company, accompanied by a Board Resolution
authorizing the execution of any such supplemental indenture, and upon receipt
by the Trustee of the documents described in (and subject to the last sentence
of) Section 10.03, the Trustee shall join with the Company in the execution of
any supplemental indenture authorized or permitted by the terms of this
Indenture.

          SECTION 10.02.  SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS.

          With the written consent of the Holders of a majority in principal
amount of the Outstanding Securities of each series affected by such
supplemental indenture, by Act of said Holders delivered to the Company and the
Trustee, the Company, when authorized by a Board Resolution, and the Trustee
shall, subject to Section 10.03, enter into an indenture or indentures
supplemental hereto for the purpose of adding any provisions to or changing in
any manner or eliminating any of the provisions of this Indenture or of
modifying in any manner the rights of the Holders of Securities of such series
under this Indenture; provided, however, that no such supplemental indenture
shall, without the consent of the Holder of each Outstanding Security affected
thereby,

          (1) change the Stated Maturity of the principal of, or any 
     installment of principal of or interest on, any Security, or reduce the 
     principal amount thereof or the rate of interest thereon or any premium 
     payable upon the redemption thereof or extend the time for payment 
     thereof, or reduce the amount of the principal of an Original Issue 
     Discount Security that would be due and payable upon a declaration of 
     acceleration of the Maturity thereof pursuant to Section 6.02, or change 
     any Place of Payment where, or the coin or currency in which, any 
     Security or any premium or the interest thereon is payable, or impair 
     the right to institute suit for the enforcement of any such payment on 
     or after the Stated Maturity thereof (or, in the case of redemption, on 
     or after the Redemption Date), or impair the interest hereunder of the 
     Trustee in the Collateral Bonds or Substituted Collateral Bonds, or 
     reduce the principal amount of any issue of Collateral Bonds (except, as 
     provided in this Indenture, upon the Release Date) or Substituted 
     Collateral Bonds to an amount less than the principal amount of the 
     Related Series of Securities or alter the payment provisions of such 
     Collateral Bonds or Substituted Collateral Bonds in a manner adverse to 
     the Holders of the Securities, in each case without the consent of the 
     Holder of each Security so affected; or

          (2) reduce the percentage in principal amount of the Outstanding 
     Securities of any series, the consent of whose Holders is required for 
     any such supplemental indenture, or the consent of whose Holders is 
     required for any waiver of compliance with certain provisions of this 
     Indenture or Defaults or Events of Default hereunder and their 
     consequences provided for in this Indenture; or

                                      -71-


          (3) change the redemption provisions (including Article Twelve) 
     hereof in a manner adverse to such Holder; or

          (4) modify any of the provisions of this Section or Section 6.13, 
     except to increase any such percentage or to provide that certain other 
     provisions of this Indenture cannot be modified or waived without the 
     consent of the Holder of each Outstanding Security affected thereby; 
     provided, however, that this clause shall not be deemed to require the 
     consent of any Holder with respect to changes in the references to "the 
     Trustee" and concomitant changes in this Section, or the deletion of 
     this proviso, in accordance with the requirements of Sections 7.11(b) 
     and 10.01(7).

A supplemental indenture which changes or eliminates any covenant or other
provisions of this Indenture which has expressly been included solely for the
benefit of one or more particular series of Securities, or which modifies the
rights of the Holders of Securities of such series with respect to such covenant
or other provision, shall be deemed not to affect the rights under this
Indenture of the Holders of Securities of any other series.

          It shall not be necessary for any Act of Holders under this Section to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.

          SECTION 10.03.  EXECUTION OF SUPPLEMENTAL INDENTURES.

          The Trustee shall sign any supplemental indenture authorized pursuant
to this Article, subject to the last sentence of this Section 10.03.  In
executing, or accepting the additional trusts created by, any supplemental
indenture permitted by this Article or the modifications thereby of the trusts
created by this Indenture, the Trustee shall be entitled to receive, and
(subject to Section 7.01) shall be fully protected in relying upon, an Officer's
Certificate and an Opinion of Counsel stating that the execution of such
supplemental indenture is authorized or permitted by this Indenture.  The
Trustee may, but shall not be obligated to, enter into any such supplemental
indenture which affects the Trustee's own rights, duties or immunities under
this Indenture or otherwise.

          SECTION 10.04.  EFFECT OF SUPPLEMENTAL INDENTURES.

          Upon the execution of any supplemental indenture under this Article,
this Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities theretofore or thereafter authenticated and delivered hereunder
shall be bound thereby.

          SECTION 10.05.  CONFORMITY WITH TRUST INDENTURE ACT.

          Every supplemental indenture executed pursuant to this Article shall
conform to the requirements of the Trust Indenture Act as then in effect.

                                      -72-


          SECTION 10.06.  REFERENCE IN SECURITIES TO SUPPLEMENTAL INDENTURES.

          Securities of any series authenticated and delivered after the 
execution of any supplemental indenture pursuant to this Article may, and 
shall if required by the Trustee, bear a notation in form approved by the 
Trustee as to any matter provided for in such supplemental indenture.  If the 
Company shall so determine, new Securities of any series so modified as to 
conform, in the opinion of the Trustee and the Company, to any such 
supplemental indenture may be prepared and executed by the Company and 
authenticated and delivered by the Trustee in exchange for Outstanding 
Securities of such series.

                                      -73-


                                   ARTICLE XI

                                   COVENANTS

          SECTION 11.01.  PAYMENTS OF PRINCIPAL AND INTEREST.

          With respect to each series of Securities, the Company will duly 
and punctually pay the principal of (and premium, if any) and interest on 
such Securities in accordance with their terms and this Indenture, and will 
duly comply with all the other terms, agreements and conditions contained in, 
or made in the Indenture for the benefit of, the Securities of such series.

          SECTION 11.02.  MAINTENANCE OF OFFICE OR AGENCY.

          The Company will maintain an office or agency in each Place of 
Payment where Securities may be surrendered for registration of transfer or 
exchange or for presentation for payment, where notices and demands to or 
upon the Company in respect of the Securities and this Indenture may be 
served.  The Company will give prompt written notice to the Trustee of the 
location, and any change in location, of such office or agency.  If at any 
time the Company shall fail to maintain any such required office or agency or 
shall fail to furnish the Trustee with the address thereof, such 
presentations, surrenders, notices and demands may be made or served at the 
address of the Trustee as set forth in Section 1.05.

          The Company may also from time to time designate one or more other 
offices or agencies where the Securities may be presented or surrendered for 
any or all such purposes and may from time to time rescind such designations. 
The Company will give prompt written notice to the Trustee of any such 
designation or rescission and of any change in the location of any such other 
office or agency.

          Unless otherwise set forth in, or pursuant to, a Board Resolution 
or Indenture supplemental hereto with respect to a series of Securities, the 
Company hereby initially designates the Corporate Trust Office of Firstar 
Bank Milwaukee, National Association, in Milwaukee, Wisconsin, as such office 
of the Company.

          SECTION 11.03.  CORPORATE EXISTENCE.

          Subject to Article IX, the Company will do or cause to be done all 
things necessary to preserve and keep in full force and effect its corporate 
existence and the rights (charter and statutory) and franchises of the 
Company; provided, however, that the Company shall not be required to 
preserve any such right or franchise if the Board of Directors shall 
determine that the preservation thereof is no longer desirable in the conduct 
of the business of the Company.

                                      -74-


          SECTION 11.04.  PAYMENT OF TAXES AND OTHER CLAIMS.

          The Company will pay or discharge, or cause to be paid or 
discharged, before the same shall become delinquent, (l) all material taxes, 
assessments and governmental charges levied or imposed upon the Company or 
upon the income, profits or property of the Company, and (2) all lawful 
claims for labor, materials and supplies which, if unpaid, might by law 
become a material lien upon the property of the Company; provided, however, 
that the Company shall not be required to pay or discharge or cause to be 
paid or discharged any such tax, assessment, charge or claim whose amount, 
applicability or validity is being contested in good faith by appropriate 
proceedings and for which adequate provision has been made.

          SECTION 11.05.  MAINTENANCE OF PROPERTIES.

          The Company will cause all material properties used or useful in 
the conduct of its business to be maintained and kept in good condition, 
repair and working order (normal wear and tear excepted) and supplied with 
all necessary equipment and will cause to be made all necessary repairs, 
renewals, replacements, betterments and improvements thereof, all as in the 
judgment of the Company may be necessary, so that the business carried on in 
connection therewith may be properly and advantageously conducted at all 
times; provided, however, that nothing in this Section shall prevent the 
Company from discontinuing the operation or maintenance of any of such 
properties, or disposing of any of them, if such discontinuance or disposal 
is, in the judgment of the Board of Directors, desirable in the conduct of 
the business of the Company.

          SECTION 11.06.  OPINIONS OF COUNSEL.  The Company will cause this 
Indenture, any indentures supplemental to this Indenture, and any financing 
or continuation statements to be promptly recorded and filed and rerecorded 
and refiled in such a manner and in such places, as may be required by law in 
order fully to preserve, protect and perfect the security of the Holders and 
all rights of the Trustee, and shall deliver to the Trustee:

          (a)  Promptly after the execution and delivery of this Indenture 
and of any indenture supplemental to this Indenture but prior to the Release 
date, an Opinion of Counsel either stating that, in the opinion of such 
counsel, this Indenture or such supplemental indenture and any financing of 
continuation statements have been properly recorded and filed so as to make 
effective and to perfect the interest of the Trustee in the Collateral Bonds 
intended to be created by this Indenture for the benefit of the Holders from 
time to time of the Securities, and reciting the details of such action, or 
stating that, in the opinion of such counsel, no such action is necessary to 
perfect or make such interest effective and stating what, if any, action of 
the foregoing character may reasonably be expected to become necessary prior 
to the next succeeding May 1 to maintain, perfect and make such interest 
effective; and

          (b)  On or before May 1 of each year, commencing May 1, 1999, and 
prior to the Release Date, an Opinion of Counsel either stating that in the 
opinion of such counsel such action has been taken, since the date of the 
most recent Opinion of Counsel furnished pursuant to this Section 11.06(b) or 
the first Opinion of Counsel furnished pursuant to Section 11.06(a) 

                                      -75-


hereof, with respect to the recording, filing, rerecording, or refiling of 
this Indenture, each supplemental indenture and any financing or continuation 
statements, as is necessary to maintain and perfect the interest of the 
Trustee in the Collateral Bonds intended to be created by this Indenture for 
the benefit of the Holders from time to time of the Securities, and reciting 
the details of such action, or stating that in the opinion of such counsel no 
such action is necessary to maintain and perfect such interest and stating 
what, if any, action of the foregoing character may reasonably be expected to 
become necessary prior to the next succeeding May 1 to maintain, perfect and 
make such security interest effective.

          SECTION 11.07. COMPLIANCE CERTIFICATES.

          (a)  The Company shall deliver to the Trustee within 90 days after 
the end of each fiscal year of the Company (which fiscal year currently ends 
on December 31), an Officer's Certificate stating whether or not the signer 
knows of any Default or Event of Default by the Company that occurred prior 
to the end of the fiscal year and is then continuing.  If the signer does 
know of such a Default or Event of Default, the certificate shall describe 
each such Default or Event of Default and its status and the specific section 
or sections of this Indenture in connection with which such Default or Event 
of Default has occurred.  The Company shall also promptly notify the Trustee 
in writing should the Company's fiscal year be changed so that the end 
thereof is on any date other than the date on which the Company's fiscal year 
currently ends.  The certificate need not comply with Section 1.02.

          (b)  The Company shall deliver to the Trustee, within 10 days after 
the occurrence thereof, notice of any default which with the giving of notice 
and the lapse of time would be an Event of Default within the meaning of 
Section 6.01(4) or (5).

          (c)  The Company shall deliver to the Trustee forthwith upon 
becoming aware of a Default or Event of Default (but in no event later than 
10 days after the occurrence of each Default or Event of Default that is 
continuing), an Officer's Certificate setting forth the details of such 
Default or Event of Default and the action that the Company proposes to take 
with respect thereto and the specific section or sections of this Indenture 
in connection with which such Default or Event of Default has occurred.

          SECTION 11.08. WAIVER OF STAY OR EXTENSION.

          The Company covenants (to the extent that it may lawfully do so) 
that it will not at any time insist upon, or plead, or in any manner 
whatsoever claim, and will actively resist any and all efforts to be 
compelled to take the benefit or advantage of, any stay or extension law 
wherever enacted, now or at any time hereafter in force, which may affect the 
covenants or the performance of this Indenture; and (to the extent that it 
may lawfully do so) the Company hereby expressly waives all benefit or 
advantage of any such law and covenants that it will not hinder, delay or 
impede the execution of any power herein granted to the Trustee, but will 
suffer and permit the execution of every such power as though no such law had 
been enacted.

                                      -76-


          SECTION 11.09. MONEY FOR SECURITIES PAYMENTS TO BE HELD IN TRUST.

          If the Company shall at any time act as its own Paying Agent with 
respect to any series of Securities, it will, on or before each due date of 
the principal of (and premium, if any) or interest on any of the Securities 
of that series, segregate and hold in trust for the benefit of the Persons 
entitled thereto a sum sufficient to pay the principal (and premium, if any) 
or interest so becoming due until such sums shall be paid to such Persons or 
otherwise disposed of as herein provided and will promptly notify the Trustee 
of its action or failure so to act.

          Whenever the Company shall have one or more Paying Agents for any 
series of Securities, it will, prior to each due date of the principal of 
(and premium, if any) or interest on any Securities of that series, deposit 
with a Paying Agent a sum sufficient to pay the principal (and premium, if 
any) or interest so becoming due, such sum to be held in trust for the 
benefit of the Persons entitled to such principal, premium or interest, and 
(unless such Paying Agent is the Trustee) the Company will promptly notify 
the Trustee of its action or failure to so act.

          The Company will cause each Paying Agent for any series of 
Securities (other than the Trustee) to execute and deliver to the Trustee an 
instrument in which such Paying Agent shall agree with the Trustee, subject 
to the provisions of this Section, that such Paying Agent will:

          (1) hold all sums held by it for the payment of the principal of 
     (and premium, if any) or interest on Securities of that series in trust 
     for the benefit of the Persons entitled thereto until such sums shall be 
     paid to such Persons or otherwise disposed of as herein provided;

          (2) give the Trustee notice of any default by the Company (or any 
     other obligor upon the Securities of that series) in the making of any 
     payment of principal And premium, if any) or interest on the Securities 
     of that series; and

          (3) at any time during the continuance of any such default, upon 
     the written request of the Trustee, forthwith pay to the Trustee all 
     sums so held in trust by such Paying Agent.

          The Company may at any time, for the purpose of obtaining the 
satisfaction and discharge of this Indenture or for any other purpose, pay, 
or by Company Order direct any Paying Agent to pay, to the Trustee all sums 
held in trust by the Company or such Paying Agent, such sums to be held by 
the Trustee upon the same trusts as those upon which such sums were held by 
the Company or such Paying Agent; and, upon such payment by any Paying Agent 
to the Trustee, such Paying Agent shall be released from all further 
liability with respect to such money.

          Any money deposited with the Trustee or any Paying Agent, or then 
held by the Company, in trust for the payment of the principal of (and 
premium, if any) or interest on any 

                                      -77-


Security of any series and remaining unclaimed for two years after such 
principal (and premium, if any) or interest has become due and payable shall 
be paid to the Company on Company Request, or (if then held by the Company) 
shall be discharged from such trust; and the Holder of such Security shall 
thereafter, as an unsecured general creditor, look only to the Company for 
payment thereof, and all liability of the Trustee or such Paying Agent with 
respect to such trust money, and all liability of the Company as trustee 
thereof, shall thereupon cease; provided, however, that the Trustee or such 
Paying Agent, before being required to make any such repayment, may at the 
expense of the Company cause to be published once, in a newspaper published 
in the English language, customarily published on each Business Day and of 
general circulation in New York, New York, notice that such money remains 
unclaimed and that, after a date specified therein, which shall not be less 
than 30 days from the date of such publication, any unclaimed balance or such 
money then remaining will be repaid to the Company.

          SECTION 11.10. RESTRICTIONS ON LIENS.

          (a)  So long as any Securities are outstanding, the Company will 
not issue, assume, guarantee or permit to exist after the Release Date any 
Debt secured by any Lien on any Operating Property of the Company, whether 
owned at the date of this Indenture or thereafter acquired, without in any 
such case effectively securing the outstanding Securities (together with, if 
the Company shall so determine, any other Debt of or guaranteed by the 
Company ranking equally with, the Securities) equally and ratably with such 
Debt (but only so long as such Debt is so secured); PROVIDED, HOWEVER, that 
the foregoing restriction shall not apply to Debt secured by any of the 
following:

          (i)    Liens on any Operating Property existing at the time of 
     acquisition thereof (which Liens may also extend to subsequent repairs, 
     alterations and improvements to such Operating Property);

          (ii)   Liens on operating property of a corporation existing at the 
     time such corporation is merged into or consolidated with the Company, 
     or at the time of a sale, lease, or other disposition of the properties 
     of such corporation or a division thereof as an entirety or 
     substantially as an entirety to the Company;

          (iii)  Liens on Operating Property to secure all or part of the 
     cost of acquiring, constructing, developing, or substantially repairing, 
     altering, or improving such property, or to secure indebtedness incurred 
     to provide funds for any such purpose or for reimbursement of funds 
     previously expended for any such purpose, provided such Liens are 
     created or assumed contemporaneously with, or within eighteen (18) 
     months after, such acquisition or the completion of construction, 
     development, or substantial repair, alteration or improvement;

          (iv)   Liens in favor of any State, or any department, agency, or 
     instrumentality or political subdivision of any State, or for the 
     benefit of holders of securities issued by any such entity (or providers 
     of credit enhancement with respect to 

                                      -78-


     such securities), to secure any Debt (including, without limitation, 
     obligations of the Company with respect to industrial development, 
     pollution control or similar revenue bonds) incurred for the purpose of 
     financing all or any part of the purchase price or the cost of 
     constructing, developing, or substantially repairing, altering, or 
     improving Operating Property of the Company;

          (v)    Any Lien created by any Substituted Mortgage Indenture 
     securing Substituted Collateral Bonds;

          (vi)   Any extension, renewal or replacement (or successive 
     extensions, renewals, or replacements), in whole or in part, of any Lien 
     referred to in the foregoing clauses (i) to (v), inclusive; PROVIDED, 
     HOWEVER, that the principal amount of Debt secured thereby and not 
     otherwise authorized by said clauses (i) to (v), inclusive, shall not 
     exceed the principal amount of Debt, plus any premium or fee payable in 
     connection with any such extension, renewal, or replacement, so secured 
     at the time of such extension, renewal, or replacement.

          (b)  Notwithstanding the provisions of Section 11.10(a), the 
Company may issue, assume, or guarantee Debt, or permit to exist after the 
Release Date any Debt, in each case, secured by Liens which would otherwise 
be subject to the restrictions of Section 11.10(a) up to an aggregate 
principal amount that, together with the principal amount of all other Debt 
of the Company secured by Liens (other than Liens permitted by Section 
11.10(a) that would otherwise be subject to any of the foregoing 
restrictions) and the Value of all Sale and Lease-Back Transactions in 
existence at such time (other than (i) any Sale and Lease-Back Transaction 
that, if such Sale and Lease-Back Transaction had been a Lien, would have 
been permitted by Section 11.10(a), (ii) Sale and Lease-Back Transactions 
permitted by Section 11.11 because the commitment by or on behalf of the 
purchaser was obtained no later than eighteen (18) months after the later of 
events described in (i) or (ii) of Section 11.11, and (iii) Sale and 
Lease-Back Transactions as to which application of amounts have been made in 
accordance with clause (z) of Section 11.11), does not at the time exceed the 
greater of ten percent (10%) of Net Tangible Assets or ten percent (10%) of 
Capitalization.

          (c)  If the Company shall issue, assume, or guarantee any Debt 
secured by any Lien and if Section 11.10(a) requires that the outstanding 
Securities be secured equally and ratably with such Debt, the Company will 
promptly execute, at its expense, any instruments necessary to so equally and 
ratably secure the outstanding Securities and deliver the same to the Trustee 
along with:

          (ii) An Officers' Certificate stating that the covenant of the 
     Company contained in Section 11.10(a) has been complied with; and

          (iii)     An Opinion of Counsel to the effect that the Company has 
     complied with the covenant contained in Section 11.10(a), and that any 
     instruments executed by the Company in the performance of such covenant 
     comply with the requirements of such covenant.

                                      -79-



          In the event that the Company shall hereafter secure outstanding 
Securities equally and ratably with any other obligation or indebtedness 
pursuant to the provisions of this Section 11.10, the Company will, upon the 
request of the Trustee, enter into an indenture or agreement supplemental 
hereto and take such other action, if any, as the Trustee may reasonably 
request to enable it to enforce effectively the rights of the Holders of 
outstanding Securities so secured, equally and ratably with such other 
obligation or indebtedness.

          SECTION 11.11. RESTRICTIONS ON SALE AND LEASE-BACK TRANSACTIONS.  So
long as any Securities are outstanding, the Company will not enter into or 
permit to exist after the Release Date any Sale and Lease-Back Transaction 
with respect to any Operating Property if, in any case, the commitment by or 
on behalf of the purchaser is obtained more than eighteen (18) months after 
the later of (i) the completion of the acquisition, construction, or 
development of such Operating Property or (ii) the placing in operation of 
such Operating Property or of such Operating Property as constructed, 
developed, or substantially repaired, altered, or improved, unless (x) the 
Company would be entitled pursuant to Section 11.10(a) to issue, assume, 
guarantee or permit to exist Debt secured by a Lien on such Operating 
Property without equally and ratably securing the Securities or (y) the 
Company would be entitled pursuant to Section 11.10(b), after giving effect 
to such Sale and Lease-Back Transaction, to incur $1.00 of additional Debt 
secured by Liens (other than Liens permitted by Section 11.10(a)) or (z) the 
Company shall apply or cause to be applied, in the case of a sale or transfer 
for cash, an amount equal to the net proceeds thereof (but not in excess of 
the net book value of such Operating Property at the date of such sale or 
transfer) and, in the case of a sale or transfer otherwise than for cash, an 
amount equal to the fair value (as determined by the Board of Directors) of 
the Operating Property so leased, to the retirement, within one hundred 
eighty (180) days after the effective date of such Sale and Lease-Back 
Transaction, of Securities (in accordance with their terms) or other Debt of 
the Company ranking senior to, or equally with, the Securities; PROVIDED, 
HOWEVER, that the amount to be applied to such retirement of Debt shall be 
reduced by an amount equal to the principal amount, plus any premium or fee 
paid in connection with any redemption in accordance with the terms of Debt 
voluntarily retired by the Company within such one hundred eighty (180) day 
period, excluding retirement pursuant to mandatory sinking fund or prepayment 
provisions and payments at maturity.

                                      -80-


                                       
                                  ARTICLE XII

                            REDEMPTION OF SECURITIES

          SECTION 12.01. APPLICABILITY OF ARTICLE.

          Securities of any series which are redeemable before their Stated 
Maturity shall be redeemable in accordance with their terms and (except as 
otherwise specified as contemplated by Section 3.01 for Securities of any 
series) in accordance with this Article.

          SECTION 12.02. ELECTION TO REDEEM; NOTICE TO TRUSTEE.

          The election of the Company to redeem any Securities shall be 
evidenced by a Board Resolution.  In case of any redemption at the election 
of the Company of less than all the Securities of any series, the Company 
shall, at least 45 days prior to the Redemption Date fixed by the Company 
(unless a shorter notice shall be satisfactory to the Trustee), notify the 
Trustee of such Redemption Date and of the principal amount of Securities of 
such series to be redeemed.  In the case of any redemption of Securities 
prior to the expiration of any restriction on such redemption provided in the 
terms of such Securities or elsewhere in this Indenture, the Company shall 
furnish the Trustee with an Officer's Certificate evidencing compliance with 
such restriction.

          SECTION 12.03. ELECTION BY TRUSTEE OF SECURITIES TO BE REDEEMED.

          If less than all the Securities of any series are to be redeemed, 
the particular Securities to be redeemed shall be selected not more than 90 
days prior to the Redemption Date by the Trustee, from the Outstanding 
Securities of such series not previously called for redemption, substantially 
pro rata, by lot or by any other method as the Trustee considers fair and 
appropriate and that complies with the requirements of the principal national 
securities exchange, if any, on which such Securities are listed, and which 
may provide for the selection for redemption of portions (equal to the 
minimum authorized denomination for Securities of that series or any integral 
multiple thereof) of the principal amount of Securities of such series of a 
denomination larger than the minimum authorized denomination for Securities 
of that series; provided that in case the Securities of such series have 
different terms and maturities, the Securities to be redeemed shall be 
selected by the Company and the Company shall give notice thereof to the 
Trustee.

          The Trustee shall promptly notify the Company in writing of the 
Securities selected for redemption and, in the case of any Securities 
selected for partial redemption, the principal amount thereof to be redeemed.

          For all purposes of this Indenture, unless the context otherwise 
requires, all provisions relating to the redemption of the Securities shall 
relate, in the case of any Securities redeemed or to be redeemed only in 
part, to the portion of the principal amount of such Securities which has 
been or is to be redeemed.

                                      -81-


          SECTION 12.04. NOTICE OF REDEMPTION.

          Notice of redemption shall be given by first-class mail, postage 
prepaid, mailed not less than 30 nor more than 45 days prior to the 
Redemption Date, unless otherwise provided in an indenture supplemental 
hereto, to each Holder of Securities to be redeemed, at his address appearing 
in the Security Register.

          All notices of redemption shall state:

          (1) the Redemption Date;

          (2) the Redemption Price;

          (3) if less than all the Outstanding Securities of any series are 
     to be redeemed, the identification (and, in the case of partial 
     redemption, the principal amounts) of the particular Securities to be 
     redeemed;

          (4) that on the Redemption Date the Redemption Price will become 
     due and payable upon each such Security to be redeemed and, if 
     applicable, that interest thereon will cease to accrue on and after said 
     date;

          (5) the place or places where such Securities are to be surrendered 
     for payment of the Redemption Price;

          (6) that the redemption is for a sinking fund, if such is the case;

          (7) the CUSIP number, if any, of the Securities to be redeemed; and

          (8) unless otherwise provided as to a particular series of 
     Securities, if at the time of publication or mailing of any notice of 
     redemption the Company shall not have deposited with the Trustee or 
     Paying Agent and/or irrevocably directed the Trustee or Paying Agent to 
     apply, from money held by it available to be used for the redemption of 
     Securities, an amount in cash sufficient to redeem all of the Securities 
     called for redemption, including accrued interest to the Redemption 
     Date, such notice shall state that it is subject to the receipt of the 
     redemption moneys by the Trustee or Paying Agent before the Redemption 
     Date (unless such redemption is mandatory) and such notice shall be of 
     no effect unless such moneys are so received before such date.

          Notice of redemption of Securities to be redeemed at the election of
the Company shall be given by the Company or, at the Company's request, by the
Trustee in the name and at the expense of the Company.

          SECTION 12.05. DEPOSIT OF REDEMPTION PRICE.

          Prior to any Redemption Date, the Company shall deposit with the
Trustee or with a Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 11.08) an amount of
money sufficient to pay the Redemption 

                                       -82-


Price of, and (except if the Redemption Date shall be an Interest Payment 
Date) accrued interest on, all the Securities which are to be redeemed on 
that date.

          SECTION 12.06. SECURITIES PAYABLE ON REDEMPTION DATE.

          Notice of redemption having been given as aforesaid, the Securities 
so to be redeemed shall, on the Redemption Date, become due and payable at 
the Redemption Price therein specified, and from and after such date (unless 
the Company shall default in the payment of the Redemption Price and accrued 
interest) such Securities shall cease to bear interest.  Upon surrender of 
any such Security for redemption in accordance with said notice, such 
Security shall be paid by the Company at the Redemption Price, together with 
accrued interest to the Redemption Date; provided, however, that installments 
of interest whose Stated Maturity is on or prior to the Redemption Date shall 
be payable to the Holders of such Securities, or one or more Predecessor 
Securities, registered as such at the close of business on the relevant 
Regular or Special Record Dates according to their terms and the provisions 
of Section 3.07.

          If any Security called for redemption shall not be so paid upon 
surrender thereof for redemption, the principal (and premium, if any) shall, 
until paid, bear interest from the Redemption Date at the rate prescribed 
therefor in the Security.

          SECTION 12.07. SECURITIES REDEEMED IN PART.

          Any Security which is to be redeemed only in part shall be 
surrendered at an office or agency of the Company at a Place of Payment 
therefor (with, if the Company or the Trustee so requires, due endorsement 
by, or a written instrument of transfer in form satisfactory to the Company 
and the Trustee duly executed by, the Holder thereof or his attorney duly 
authorized in writing), and the Company shall execute, and the Trustee shall 
authenticate and deliver to the Holder of such Security without service 
charge, a new Security or Securities of the same series and Stated Maturity, 
of any authorized denomination as requested by such Holder, in aggregate 
principal amount equal to and in exchange for the unredeemed portion of the 
principal of the Security so surrendered.

                                      -83-


                                  ARTICLE XIII

                                 SINKING FUNDS

          SECTION 13.01. APPLICABILITY OF ARTICLE.

          The provisions of this Article shall be applicable to any sinking 
fund for the retirement of Securities of a series, except as otherwise 
specified as contemplated by Section 3.01 for Securities of such series.

          The minimum amount of any sinking fund payment provided for by the 
terms of Securities of any series is herein referred to as a "MANDATORY 
SINKING FUND PAYMENT," and any payment in excess of such minimum amount 
provided for by the terms of Securities of any series is herein referred to 
as an "OPTIONAL SINKING FUND PAYMENT."  If provided for by the terms of 
Securities of any series, the cash amount of any sinking fund payment may be 
subject to reduction as provided in Section 13.02.  Each sinking fund payment 
shall be applied to the redemption of Securities of any series as provided 
for by the terms of Securities of such series.

          SECTION 13.02. SATISFACTION OF SINKING FUND PAYMENTS WITH 
                         SECURITIES.

          The Company (1) may deliver Securities of a series (other than any 
Securities previously called for redemption) and (2) may apply as a credit 
Securities of a series which have been redeemed either at the election of the 
Company pursuant to the terms of such Securities or through the application 
of permitted optional sinking fund payments pursuant to the terms of such 
Securities, in each case in satisfaction of all or any part of any sinking 
fund payment with respect to the Securities of such series required to be 
made pursuant to the terms of such Securities as provided for by the terms of 
such series; provided that such Securities have not been previously so 
credited. Such Securities shall be received and credited for such purpose by 
the Trustee at the Redemption Price specified in such Securities for 
redemption through operation of the sinking fund and the amount of such 
sinking fund payment shall be reduced accordingly.

          SECTION 13.03. REDEMPTION OF SECURITIES FOR SINKING FUND.

          Not less than 45 days prior to each sinking fund payment date for 
any series of Securities, the Company will deliver to the Trustee an 
Officer's Certificate specifying the amount of the next ensuing sinking fund 
payment for that series pursuant to the terms of that series, the portion 
thereof, if any, which is to be satisfied by payment of cash and the portion 
thereof, if any, which is to be satisfied by delivering and crediting 
Securities of that series pursuant to Section 13.02 and will also deliver to 
the Trustee any Securities to be so delivered.  Not less than 30 days before 
each such sinking fund payment date the Trustee shall select the Securities 
to be redeemed upon such sinking fund payment date in the manner specified in 
Section 12.03 and cause notice of the redemption thereof to be given in the 
name of and at the expense of the Company in the manner provided in Section 
12.04.  Such notice having been 

                                      -84-


duly given, the redemption of such Securities shall be made upon the terms 
and in the manner stated in Sections 12.06 and 12.07.

                                       
                                  ARTICLE XIV

                       DEFEASANCE AND COVENANT DEFEASANCE

          SECTION 14.01. APPLICABILITY OF ARTICLE; COMPANY'S OPTION TO EFFECT
                         DEFEASANCE OR COVENANT DEFEASANCE.

          Unless pursuant to Section 3.01 provision is made for the 
inapplicability of either or both of (a) Defeasance of the Securities of a 
series under Section 14.02 or (b) Covenant Defeasance of the Securities of a 
series under Section 14.03, then the provisions of such Section or Sections, 
as the case may be, together with the other provisions of this Article, shall 
be applicable to the Securities of such series, and the Company may at its 
option by Board Resolution, at any time, with respect to the Securities of 
such series, elect to have either Section 14.02 (unless inapplicable) or 
Section 14.03 (unless inapplicable) be applied to the Outstanding Securities 
of such series upon compliance with the applicable conditions set forth below 
in this Article.

          SECTION 14.02. DEFEASANCE AND DISCHARGE.

          Upon the Company's exercise of the option provided in Section 14.01 
to defease the Outstanding Securities of a particular series, the Company 
shall be discharged from its obligations with respect to the Outstanding 
Securities of such series on the date the applicable conditions set forth in 
Section 14.04 are satisfied (hereinafter, "DEFEASANCE").  Defeasance shall 
mean that the Company shall be deemed to have paid and discharged the entire 
indebtedness represented by the Outstanding Securities of such series and to 
have satisfied all its other obligations under such Securities and this 
Indenture insofar as such Securities are concerned (and the Trustee, at the 
expense of the Company, shall execute proper instruments acknowledging the 
same); provided, however, that the following rights, obligations, powers, 
trusts, duties and immunities shall survive until otherwise terminated or 
discharged hereunder:  (A) the rights of Holders of Outstanding Securities of 
such series to receive, solely from the trust fund provided for in Section 
14.04, payments in respect of the principal of (and premium, if any) and 
interest on such Securities when such payments are due, (B) the Company's 
obligations with respect to such Securities under Sections 3.04, 3.05, 3.06, 
11.02 and 11.09, (C) the rights, powers, trusts, duties and immunities of the 
Trustee hereunder and (D) this Article.  Subject to compliance with this 
Article, the Company may exercise its option with respect to Defeasance under 
this Section 14.02 notwithstanding the prior exercise of its option with 
respect to Covenant Defeasance under Section 14.03 in regard to the 
Securities of such series.

          SECTION 14.03. COVENANT DEFEASANCE.

          Upon the Company's exercise of the option provided in Section 14.01 to
obtain a Covenant Defeasance with respect to the Outstanding Securities of a
particular series, the 

                                      -85-


Company shall be released from its obligations under this Indenture (except 
its obligations under Sections 3.04, 3.05, 3.06, 6.06, 6.09, 7.10, 11.01, 
11.02, 11.06, 11.08 and 11.09) with respect to the Outstanding Securities of 
such series on and after the date the applicable conditions set forth in 
Section 14.04 are satisfied (hereinafter, "COVENANT DEFEASANCE"). Covenant 
Defeasance shall mean that, with respect to the Outstanding Securities of 
such series, the Company may omit to comply with and shall have no liability 
in respect of any term, condition or limitation set forth in this Indenture 
(except its obligations under Sections 3.04, 3.05, 3.06, 6.06, 6.09, 7.10, 
11.01, 11.02, 11.06, 11.08 and 11.09), whether directly or indirectly by 
reason of any reference elsewhere herein or by reason of any reference to any 
other provision herein or in any other document, and such omission to comply 
shall not constitute an Event of Default under Section 6.01(3) with respect 
to Outstanding Securities of such series, and the remainder of this Indenture 
and of the Securities of such series shall be unaffected thereby.

          SECTION 14.04. CONDITIONS TO DEFEASANCE OR COVENANT DEFEASANCE.

          The following shall be the conditions to Defeasance under Section 
14.02 and Covenant Defeasance under Section 14.03 with respect to the 
Outstanding Securities of a particular series:

          (1) The Company shall irrevocably have deposited or caused to be 
     deposited with the Trustee (or another trustee satisfying the 
     requirements of Section 7.09 who shall agree to comply with the 
     provisions of this Article applicable to it), under the terms of an 
     irrevocable trust agreement in form and substance reasonably 
     satisfactory to such Trustee, as trust funds in trust for the purpose of 
     making the following payments, specifically pledged as security for, and 
     dedicated solely to, the benefit of the Holders of such Securities, (A) 
     Dollars in an amount, or (B) U.S. Government Obligations which through 
     the scheduled payment of principal and interest in respect thereof in 
     accordance with their terms will provide, not later than the due date of 
     any payment, money in an amount, or (C) a combination thereof, in each 
     case sufficient, after payment of all federal, state and local taxes or 
     other charges or assessments in respect thereof payable by the Trustee, 
     in the opinion of a nationally recognized firm of independent public 
     accountants expressed in a written certification thereof delivered to 
     the Trustee, to pay and discharge, and which shall be applied by the 
     Trustee (or other qualifying trustee) to pay and discharge, (i) the 
     principal of (and premium, if any, on) and each installment of principal 
     of (and premium, if any) and interest on the Outstanding Securities of 
     such series on the Stated Maturity of such principal or installment of 
     principal or interest and (ii) any mandatory sinking fund payments or 
     analogous payments applicable to the Outstanding Securities of such 
     series on the day on which such payments are due and payable in 
     accordance with the terms of this Indenture and of such Securities.

          (2) No Default or Event of Default with respect to the Securities 
     of such series shall have occurred and be continuing on the date of such 
     deposit or shall occur as a result of such deposit, and no Default or 
     Event of Default under clause (6) or (7) 

                                      -86-


 
     of Section 6.01 shall occur and be continuing, at any time during the 
     period ending on the 91st day after the date of such deposit (it being 
     understood that this condition shall not be deemed satisfied until the 
     expiration of such period).

          (3) Such deposit, Defeasance or Covenant Defeasance shall not 
     result in a breach or violation of, or constitute a default under, any 
     other agreement or instrument to which the Company is a party or by 
     which it is bound.

          (4) Such Defeasance or Covenant Defeasance shall not cause any 
     Securities of such series then listed on any national securities 
     exchange registered under the Exchange Act to be delisted.

          (5) In the case of an election with respect to Section 14.02, the 
     Company shall have delivered to the Trustee either (A) a ruling directed 
     to the Trustee received from the Internal Revenue Service to the effect 
     that the Holders of the Outstanding Securities of such series will not 
     recognize income, gain or loss for federal income tax purposes as a 
     result of such Defeasance and will be subject to federal income tax on 
     the same amounts, in the same manner and at the same times as would have 
     been the case if such Defeasance had not occurred or (B) an Opinion of 
     Counsel, based on such ruling or on a change in the applicable federal 
     income tax law since the date of this Indenture, in either case to the 
     effect that, and based thereon such opinion shall confirm that, the 
     Holders of the Outstanding Securities of such series will not recognize 
     income, gain or loss for federal income tax purposes as a result of such 
     Defeasance and will be subject to federal income tax on the same 
     amounts, in the same manner and at the same times as would have been the 
     case if such Defeasance had not occurred.

          (6) In the case of an election with respect to Section 14.03, the 
     Company shall have delivered to the Trustee an Opinion of Counsel or a 
     ruling directed to the Trustee received from the Internal Revenue 
     Service to the effect that the Holders of the Outstanding Securities of 
     such series will not recognize income, gain or loss for federal income 
     tax purposes as a result of such Covenant Defeasance and will be subject 
     to federal income tax on the same amounts, in the same manner and at the 
     same times as would have been the case if such Covenant Defeasance had 
     not occurred.

          (7) Such Defeasance or Covenant Defeasance shall be effected in 
     compliance with any additional terms, conditions or limitations which 
     may be imposed on the Company in connection therewith pursuant to 
     Section 3.01.

          (8) The Company shall have delivered to the Trustee an Officer's 
     Certificate and an Opinion of Counsel, each stating that all conditions 
     precedent provided for relating to either the Defeasance under Section 
     14.02 or the Covenant Defeasance under Section 14.03 (as the case may 
     be) have been complied with.

                                      -87-


          SECTION 14.05. DEPOSITED MONEY AND GOVERNMENT OBLIGATIONS TO BE 
                         HELD IN TRUST.

          Subject to the provisions of the last paragraph of Section 11.08, 
all money and Government Obligations (including the proceeds thereof) 
deposited with the Trustee (or other qualifying trustee--collectively for 
purposes of this Section 14.05, the "Trustee") pursuant to Section 14.04 in 
respect of the Outstanding Securities of a particular series shall be held in 
trust and applied by the Trustee, in accordance with the provisions of such 
Securities and this Indenture, to the payment, either directly or through any 
Paying Agent (including the Company acting as its own Paying Agent) as the 
Trustee may determine, to the Holders of such Securities of all sums due and 
to become due thereon in respect of principal (and premium, if any) and 
interest, but such money need not be segregated from other funds except to 
the extent required by law.

          The Company shall pay and indemnify the Trustee against any tax, 
fee or other charge imposed on or assessed against the Government Obligations 
deposited pursuant to Section 14.04 or the principal and interest received in 
respect thereof, other than any such tax, fee or other charge which by law is 
for the account of the Holders of the Outstanding Securities of such series.

          Anything in this Article to the contrary notwithstanding, the 
Trustee shall deliver to pay to the Company from time to time upon company 
Request any money or Government Obligations held by it as provided in Section 
14.04 which, in the opinion of a nationally recognized firm of independent 
public accountants expressed in a written certification thereof delivered to 
the Trustee, are in excess of the amount thereof which would then be required 
to be deposited for the purpose for which such money or Government 
Obligations were deposited.

                                      -88-


                                   ARTICLE XV

                                 MISCELLANEOUS

          SECTION 15.01. MISCELLANEOUS.

          This instrument may be executed in any number of counterparts, each 
of which so executed shall be deemed to be an original, but all such 
counterparts shall together constitute but one and the same instrument.

          IN WITNESS WHEREOF, the parties hereto have caused this Indenture 
to be duly executed, and their respective corporate seals to be hereunto 
affixed and attested, all as of the day and year first above written.

                                   WISCONSIN PUBLIC SERVICE CORPORATION





                                   By:  /s/ Daniel P. Bittner
                                       -------------------------------------
                                   Name:     Daniel P. Bittner
                                   Title:    Senior Vice President-Finance

Attest:

/s/ Francis J. Kicsar
- -------------------------------------
Name:     Francis J. Kicsar
Title:    Secretary

                                   FIRSTAR BANK MILWAUKEE, NATIONAL ASSOCIATION,
                                   as Trustee





                                   By: /s/ Amy E. Nolde
                                      -------------------------------------
                                   Name:     Amy E. Nolde
                                   Title:    Assistant Vice President

Attest:

/s/ Yvonne Siira
- -------------------------------------
Name:     Yvonne Siira


                                       -89-


Title:    Assistant Secretary


                                       -90-