Exhibit 1(a)

                                                                           WSP&R
                                                                           Draft
                                                                         7/25/95




                                  COMMON STOCK

                             UNDERWRITING AGREEMENT




NORTHWESTERN PUBLIC SERVICE COMPANY
33 Third Street SE
Huron, South Dakota  57350-1318

                                                            ______ __, 1995

Ladies and Gentlemen:

          On the basis of the representations and warranties, and subject to the
terms and conditions, set forth in this agreement ("this Agreement" or the
"Underwriting Agreement"), we, the Underwriters (as defined below), understand
that Northwestern Public Service Company, a Delaware corporation (the
"Company"), proposes to issue and sell to the Underwriters __________ shares of
its Common Stock, par value $3.50 per share (the "Firm Shares").  The Company
also proposes to issue and sell to the several Underwriters not more than an
additional __________ shares of its Common Stock, par value $3.50 per share (the
"Additional Shares"), if and to the extent that we, as Representative, shall
have determined to exercise, on behalf of the Underwriters, the right to
purchase such shares of common stock granted to the Underwriters in Section 3
hereof.  The Firm Shares and the Additional Shares are hereinafter collectively
referred to as the Shares.  The shares of Common Stock, par value $3.50 per
share, of the Company to be outstanding after giving effect to the sales
contemplated hereby are hereinafter referred to as the Common Stock.

          The term "Underwriters," as used herein, shall be deemed to mean the
several persons, firms or corporations named in Schedule I hereto, and the term
"Representative," as used herein, shall be deemed to mean the representative or
representatives of such Underwriters by whom or on whose behalf this
Underwriting Agreement is signed.  If there shall be one person, firm or
corporation named in Schedule I, the term "Underwriters" and the term
"Representative," as used herein, shall mean that person, firm or corporation.
All obligations of the Underwriters are several and not joint.  The use of the
term "Underwriter" herein shall not be deemed to establish or admit that a
purchaser of the Shares is an "underwriter" of the Shares as such term is
defined in and used under the Securities Act of 1933, as amended (the
"Securities Act").


          1.   REPRESENTATIONS AND WARRANTIES.  The Company represents and
warrants to and agrees with each of the Underwriters that:

          (a)  The Company has filed with the Securities and Exchange Commission
(the "Commission") a registration statement on Form S-3 (Registration Statement
No. 33-60423), including a prospectus, relating to the Shares, and has filed
with, or transmitted for filing to, or shall promptly hereafter file with or
transmit for filing to, the Commission a prospectus supplement (the "Prospectus
Supplement") specifically relating to the Shares pursuant to Rule 424 under the
Securities Act.  The term "Registration Statement" means the registration
statement, including the exhibits thereto, as amended to the date of this
Agreement.  The term "Basic Prospectus" means the prospectus included in the
Registration Statement, as amended and supplemented to the date of this
Agreement (exclusive of any supplement to the prospectus relating solely to
securities other than the Shares).  The term "Prospectus" means the Basic
Prospectus together with the Prospectus Supplement.  The term "preliminary
prospectus" means a preliminary prospectus supplement specifically relating to
the Shares, together with the Basic Prospectus.  As used herein, the terms
"Basic Prospectus," "Prospectus" and "preliminary prospectus" shall include in
each case the documents, if any, incorporated by reference therein. The terms
"supplement," "amendment" and "amend" as used herein shall include all documents
deemed to be incorporated by reference in the Prospectus that are filed
subsequent to the date of the Basic Prospectus by the Company with the
Commission pursuant to the Securities Exchange Act of 1934, as amended (the
"Exchange Act").

          (b)  The Registration Statement has become effective; no stop order
suspending the effectiveness of the Registration Statement is in effect, and, to
the Company's knowledge, after due inquiry, no proceedings for such purpose are
pending before or threatened by the Commission.

          (c)  (i)  Each document, if any, filed or to be filed pursuant to the
Exchange Act and incorporated by reference in the Prospectus complied or will
comply when so filed in all material respects with the Exchange Act and the
applicable rules and regulations of the Commission thereunder or pursuant to
said rules and regulations will be deemed to comply therewith; (ii) each part of
the Registration Statement, when such part became effective, did not contain,
and each such part, as amended or supplemented, if applicable, will not contain
any untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make the statements therein not
misleading; (iii) the Registration Statement and the Prospectus comply, and, as
amended or supplemented, if applicable, will comply in all material respects
with the Securities Act and the applicable rules and regulations of the
Commission thereunder or pursuant to said rules and regulations


                                       -2-


will be deemed to comply therewith; and (iv) the Prospectus does not contain
and, as amended or supplemented, if applicable, will not contain any untrue
statement of a material fact or omit to state a material fact necessary to make
the statements therein, in the light of the circumstances under which they were
made, not misleading, except that the representations and warranties set forth
in this Section 1(c) do not apply (A) to statements or omissions in the
Registration Statement or the Prospectus based upon information relating to any
Underwriter furnished to the Company in writing by such Underwriter expressly
for use therein.

          (d)  The Company has been duly incorporated, is validly existing as a
corporation in good standing under the laws of the State of Delaware, has the
corporate power and authority to own its property and to conduct its business as
described in the Prospectus and to enter into and perform its obligations under
this Agreement.  The Company is duly qualified to transact business and is in
good standing in each jurisdiction in which the conduct of its business or its
ownership or leasing of property requires such qualification, except to the
extent that the failure to be so qualified or be in good standing would not have
a material adverse effect on the Company and its subsidiaries, taken as a whole.

          (e)  Each subsidiary of the Company has been duly incorporated, is
validly existing as a corporation in good standing under the laws of the
jurisdiction of its incorporation, has the corporate power and authority to own
its property and to conduct its business as described in the Prospectus and is
duly qualified to transact business and is in good standing in each jurisdiction
in which the conduct of its business or its ownership or leasing of property
requires such qualification, except to the extent that the failure to be so
qualified or be in good standing would not have a material adverse effect on the
Company and its subsidiaries, taken as a whole.

          (f)  The authorized capital stock of the Company conforms as to legal
matters to the description thereof contained in the Prospectus.

          (g)  The shares of the Common Stock outstanding prior to the issuance
of the Shares have been duly authorized and are validly issued, fully paid and
non-assessable.

          (h)  The Shares have been duly authorized and, when issued and
delivered in accordance with the terms of this Agreement, will be validly
issued, fully paid and non-assessable, and the issuance of such Shares will not
be subject to any preemptive or similar rights.

          (i)  This Agreement has been duly authorized, executed and delivered
by the Company.


                                       -3-


          (j)  The execution and delivery by the Company of, and the performance
by the Company of its obligations under, this Agreement will not conflict with,
result in a breach of or constitute a default under any provision of (A)
applicable law (except for the indemnification provisions hereof which may be
unenforceable as against public policy under certain circumstances), (B) the
certificate of incorporation or by-laws of the Company, (C) any indenture,
mortgage, deed of trust or other agreement or instrument to which the Company or
any of its subsidiaries is a party that is material to the Company and its
subsidiaries, taken as a whole, or (D) any judgment, order or decree of any
governmental body, agency or court having jurisdiction over the Company or any
subsidiary.

          (k)  The Federal Energy Regulatory Commission (the "FERC") has issued
an appropriate order or orders with respect to the issuance and sale of the
Shares in accordance with this Agreement; such order or orders are in full force
and effect; the issuance and sale of the Shares are in conformity with the terms
of such order or orders; and no other authorization, approval or consent of any
other governmental body or agency is legally required for the issuance and sale
of the Shares as contemplated hereby, except such as have been obtained under
the Securities Act and such as may be required under the state securities or
Blue Sky laws in connection with the purchase and distribution of the Shares by
the Underwriters.

          (l)  There has not occurred any material adverse change, or any
development involving a prospective material adverse change, in the condition,
financial or otherwise, or in the earnings, business or operations of the
Company and its subsidiaries, taken as a whole, from that set forth in the
Prospectus.

          (m)  There are no legal or governmental proceedings pending or
threatened to which the Company or any of its subsidiaries is a party or to
which any of the properties of the Company or any of its subsidiaries is subject
that are required to be described in the Registration Statement or the
Prospectus and are not so described, or any statutes, regulations, contracts or
other documents that are required to be described in the Registration Statement
or the Prospectus or to be filed or incorporated by reference as exhibits to the
Registration Statement that are not described, filed or incorporated as
required.

          (n)  Each of the Company and its subsidiaries has all
necessary consents, authorizations, approvals, orders, certificates and permits
of and from, and has made all declarations and filings with, all federal, state,
local and other governmental authorities, all self-regulatory organizations and
all courts and other tribunals, to own, lease, license and use its properties
and assets and to conduct its business in the manner described in the
Prospectus, except to the extent that the


                                       -4-


failure to obtain or file would not have a material adverse effect on the
Company and its subsidiaries, taken as a whole.

          (o)  Each preliminary prospectus filed as part of the registration
statement as originally filed or as part of any amendment thereto, or filed
pursuant to Rule 424 under the Securities Act, complied when so filed in all
material respects with the Securities Act and the rules and regulations of the
Commission thereunder.

          (p)  The Company is not an "investment company" or an entity
"controlled" by an "investment company" as such terms are defined in the
Investment Company Act of 1940, as amended (the "Investment Company Act").

          (q)  The Company and its subsidiaries are (i) in compliance with any
and all applicable foreign, federal, state and local laws and regulations
relating to the protection of human health and safety, the environment or
hazardous or toxic substances or wastes, pollutants or contaminants
("Environmental Laws"), (ii) have received all permits, licenses or other
approvals required of them under applicable Environmental Laws to conduct their
respective businesses and (iii) are in compliance with all terms and conditions
of any such permit, license or approval, except where such noncompliance with
Environmental Laws, failure to receive required permits, licenses or other
approvals or failure to comply with the terms and conditions of such permits,
licenses or approvals would not, singly or in the aggregate, have a material
adverse effect on the Company and its subsidiaries, taken as a whole.

          (r)  In the ordinary course of its business, the Company conducts a
periodic review of the effect of Environmental Laws on the business, operations
and properties of the Company and its subsidiaries, in the course of which it
identifies and evaluates associated costs and liabilities (including, without
limitation, any capital or operating expenditures required for clean-up, closure
of properties or compliance with Environmental Laws or any permit, license or
approval, any related constraints on operating activities and any potential
liabilities to third parties).  On the basis of such review, the Company has
reasonably concluded that such associated costs and liabilities would not,
singly or in the aggregate, have a material adverse effect on the Company and
its subsidiaries taken as a whole.

          (s)  The Company has complied with all provisions of Section 517.075,
Florida Statutes (Chapter 92-198, Laws of Florida).

          (t)  On the basis of the present knowledge of the senior management of
the Company as to the business and affairs of Synergy Group Incorporated, a
Delaware corporation ("Synergy"), and its subsidiaries, the Company has no
reason to believe that the representations contained in subsections (l) and


                                       -5-


(m) above would be incorrect in any material respect on the date hereof as a
result of the consummation of the acquisition of such business on the terms
described in the Prospectus (the "Acquisition").

          (u)  The unaudited pro forma consolidated financial statements
included or incorporated by reference in the Registration Statement and the
Prospectus have been prepared in good faith by the Company, and the assumptions
on which such pro forma financial statements have been prepared provide a
reasonable basis for presenting the significant effects directly attributable to
the Acquisition described in the notes thereto.

          (v)  The Company is not aware of any facts or circumstances that would
prevent any of the conditions to the consummation of the Acquisition contained
in the Purchase and Sale Agreement dated as of May 17, 1995, by and among
Synergy and the other parties thereto (the "Acquisition Agreement") from being
satisfied in the ordinary course on or prior to September 30, 1995.

          2.  PUBLIC OFFERING.  The Company is advised by the Underwriters that
they propose to make a public offering of their respective portions of the
Shares as soon after the Registration Statement and this Agreement have become
effective as in the Representative's judgment is advisable.  The Company is
further advised by the Representative that the Shares are to be offered to the
public initially at $_____________ a share (the public offering price) and to
certain dealers selected by the Underwriters at a price that represents a
concession not in excess of $______ a share under the public offering price, and
that any Underwriter may allow, and such dealers may reallow, a concession, not
in excess of $_____ a share, to any Underwriter or to certain other dealers.

          3.  PURCHASE AND DELIVERY.  Subject to the terms and conditions herein
set forth, the Company hereby agrees to sell and the Underwriters agree to
purchase, severally and not jointly, the respective numbers of Firm Shares set
forth in Schedule I hereto opposite their names at $ _______ a share (the
"Purchase Price").

          On the basis of the representations and warranties contained in this
Agreement, and subject to its terms and conditions, the Company agrees to sell
to the Underwriters the Additional Shares, and the Underwriters shall have a
one-time right to purchase, severally and not jointly, up to ______________
Additional Shares at the purchase price.  Additional Shares may be purchased as
provided herein solely for the purpose of covering over-allotments made in
connection with the offering of the Firm Shares.  If any Additional Shares are
to be purchased, each Underwriter agrees, severally and not jointly, to purchase
the number of Additional Shares (subject to such adjustments to eliminate
fractional shares as the Representative


                                       -6-


may determine) that bears the same proportion to the total number of Additional
Shares to be purchased as the number of Firm Shares set forth in Schedule I
hereto opposite the name of such Underwriter bears to the total number of Firm
Shares.

          Payment for the Firm Shares shall be made by certified or official
bank check or checks payable to the order of the Company in New York Clearing
House funds at the office of Winthrop, Stimson, Putnam & Roberts, New York, New
York, at 10:00 A.M., local time, on ___________, 1995, or at such other time on
the same or such other date, not later than ________, 1995, as shall be
designated in writing by you.  The time and date of such payment are hereinafter
referred to as the Closing Date.

          Payment for any Additional Shares shall be made by certified or
official bank check or checks payable to the order of the Company in New York
Clearing House funds at the office of Winthrop, Stimson, Putnam & Roberts, New
York, New York, at 10:00 A.M., local time, on such date (which may be the same
as the Closing Date but shall in no event be earlier than the Closing Date nor
later than ten business days after the giving of the notice hereinafter referred
to) as shall be designated in a written notice from the Representative to the
Company of the Representative's determination, on behalf of the Underwriters, to
purchase a number, specified in said notice, of Additional Shares, or on such
other date, in any event not later than ____________, 1995, as shall be
designated in writing by the Representative.  The time and date of such payment
are hereinafter referred to as the Option Closing Date.  The notice of the
determination to exercise the option to purchase Additional Shares and of the
Option Closing Date may be given at any time within 30 days after the date of
this Agreement.

          Certificates for the Firm Shares and Additional Shares shall be in
definitive form and registered in such names and in such denominations as the
Representative shall request in writing not later than two full business days
prior to the Closing Date or the Option Closing Date, as the case may be.  The
certificates evidencing the Firm Shares and Additional Shares shall be delivered
to the Representative on the Closing Date or the Option Closing Date, as the
case may be, for the respective accounts of the several Underwriters, with any
transfer taxes payable in connection with the transfer of the Shares to the
Underwriters duly paid, against payment of the purchase price therefor.

          4.   CONDITIONS TO CLOSING.  The several obligations of the
Underwriters hereunder are subject to the following conditions:

          (a)  Subsequent to the execution and delivery of the Underwriting
Agreement and prior to the Closing Date,

               (i)  there shall not have occurred any downgrading in the rating
     accorded any of the Company's securities by


                                       -7-


     any "nationally recognized statistical rating organization," as such term
     is defined for purposes of Rule 436(g)(2) under the Securities Act;

               (ii)  there shall not have occurred any change, or any
     development involving a prospective change, in the condition, financial or
     otherwise, or in the earnings, business or operations, of the Company and
     its subsidiaries, taken as a whole, from that set forth in the Prospectus,
     that, in the judgment of the Representative, is material and adverse and
     that makes it, in the judgment of the Representative, impracticable to
     market the Shares on the terms and in the manner contemplated in the
     Prospectus; and

              (iii)  the Company shall have obtained an appropriate order or
     orders of the FERC authorizing the issuance, sale and delivery of the
     Shares as contemplated by this Agreement, which order or orders at the
     Closing Date shall be in full force and effect and shall not be contested
     or the subject of review or appeal.

          (b)  The Underwriters shall have received on the Closing Date a
certificate, dated the Closing Date and signed by an executive officer of the
Company to the effect (x) set forth in clauses (a)(i) and (a)(iii) above; (y)
that the representations and warranties of the Company contained in the
Underwriting Agreement are true and correct as of the Closing Date and that the
Company has complied with all of the agreements and satisfied all of the
conditions on its part to be performed or satisfied on or before the Closing
Date; and (z) that no executive officer of the Company has received any
notification from the Sellers (as defined in the Acquisition Agreement) or their
counsel that any information (including, without limitation, financial
information) relating to Synergy contained or incorporated by reference in the
Registration Statement or the Prospectus contains any untrue statement of a
material fact or omits to state a material fact necessary in order to make the
statements therein, in light of the circumstances under which they were made,
not misleading.  The officer signing and delivering such certificate may rely
upon the best of his knowledge as to proceedings threatened.

          (c)  The Representative shall have received on the Closing Date an
opinion dated the Closing Date of Schiff Hardin & Waite, special counsel to the
Company, to the effect that

               (i)  the Company has been duly incorporated and, based upon
     certificates or letters from state or other appropriate authorities, is
     validly existing as a corporation in good standing under the laws of the
     State of Delaware and is duly qualified and in good standing as a foreign
     corporation in the States of Iowa, Nebraska, North Dakota and South Dakota,
     with corporate powers and statutory authority to carry on the business
     which it now carries on


                                       -8-


     as stated in the Prospectus and to own and operate the properties used by
     it in such business;

              (ii)  each subsidiary of the Company has been duly incorporated
     and based upon certificates or letters from state or other appropriate
     authorities, is validly existing as a corporation in good standing under
     the laws of the jurisdiction of its incorporation with corporate powers and
     statutory authority to carry on the business which it now carries on as
     stated in the Prospectus and to own and operate the properties used by it
     in such business and is duly qualified and in good standing in each
     jurisdiction in which the conduct of its business or its ownership or
     leasing of property requires such qualification, except to the extent that
     the failure to be so qualified or be in good standing would not have a
     material adverse effect on the Company and its subsidiaries, taken as a
     whole;

             (iii)  the authorized capital stock of the Company conforms as to
     legal matters to the description thereof contained in the Prospectus;

              (iv)  the shares of the Common Stock outstanding prior to the
     issuance of the Shares have been duly authorized and are validly issued,
     fully paid and non-assessable;

               (v)  the Shares have been duly authorized and, when issued and
     delivered in accordance with the terms of this Agreement, will be validly
     issued, fully paid and non-assessable, and the issuance of such Shares will
     not be subject to any preemptive or similar rights;

              (vi)  this Agreement has been duly authorized, executed and
     delivered by the Company;

             (vii)  the execution and delivery by the Company of, and the
     performance by the Company of its obligations under, the Underwriting
     Agreement will not conflict with, result in a breach of or constitute a
     default under any provision of (A) applicable law (except for the
     indemnification provisions hereof which may be unenforceable as against
     public policy under certain circumstances), (B) the certificate of
     incorporation or by-laws of the Company, (C) any indenture, mortgage, deed
     of trust or other agreement or instrument to which the Company or any of
     its subsidiaries is a party that is material to the Company and its
     subsidiaries, taken as a whole, or (D) any judgment, order or decree of any
     governmental body, agency or court having jurisdiction over the Company or
     any subsidiary;

            (viii)  the FERC has issued an appropriate order or orders with
     respect to the issuance and sale of the Shares in accordance with the
     Underwriting Agreement; such order or


                                       -9-


     orders are in full force and effect; the issuance and sale of the Shares
     are in conformity with the terms of such order or orders; and no other
     authorization, approval or consent of any other governmental body or agency
     (including, without limitation, in the jurisdictions of South Dakota,
     Nebraska, North Dakota and Iowa) is legally required for the issuance and
     sale of the Shares as contemplated by the Underwriting Agreement, except
     such as have been obtained under the Securities Act and such as may be
     required under the state securities or Blue Sky laws in connection with the
     purchase and distribution of the Shares by the Underwriters;

              (ix)  there are no legal or governmental proceedings pending or
     threatened to which the Company or any of its subsidiaries is a party or to
     which any of the properties of the Company or any of its subsidiaries is
     subject that are required to be described in the Registration Statement or
     the Prospectus and are not so described, or any statutes, regulations,
     contracts or other documents that are required to be described in the
     Registration Statement or the Prospectus or to be filed or incorporated by
     reference as exhibits to the Registration Statement that are not described,
     filed or incorporated as required;

              (x)  the statements (A) in the Prospectus under the captions
     "Description of the Common Stock," "Underwriting," "Pending Acquisition of
     Synergy Group Incorporated" and "Plan of Distribution," (B) in the
     Registration Statement under Item 15, (C) in "Item 3 - Legal Proceedings"
     of the Company's most recent annual report on Form 10-K incorporated by
     reference in the Prospectus and (D) in "Item 1 - Legal Proceedings" of Part
     II of the Company's quarterly reports on Form 10-Q filed since such annual
     report and reviewed by such counsel, in each case insofar as such
     statements constitute summaries of the legal matters, documents or
     proceedings referred to therein, fairly present the information called for
     with respect to such legal matters, documents and proceedings and fairly
     summarize the matters referred to therein;

             (xi)  after due inquiry, such counsel does not know of any legal or
     governmental proceedings pending or threatened to which the Company or any
     of its subsidiaries is a party or to which any of the properties of the
     Company or any of its subsidiaries is subject that are required to be
     described in the Registration Statement or the Prospectus and are not so
     described or of any statutes, regulations, contracts or other documents
     that are required to be described in the Registration Statement or the
     Prospectus or to be filed or incorporated by reference as exhibits to the
     Registration Statement that are not described, filed or incorporated as
     required;


                                      -10-


            (xii)  the Company is (A) not an "investment company" or an entity
     "controlled" by an "investment company," as such terms are defined in the
     Investment Company Act or (B) a "holding company" as such term is defined
     in the Public Utility Holding Company Act of 1935, as amended;

             (xiii)  the Registration Statement has become and is effective
     under the Securities Act, and, to the best of such counsel's knowledge, no
     stop order suspending the effectiveness of the Registration Statement has
     been issued and no proceedings for a stop order with respect thereto are
     pending or threatened under Section 8(d) of the Securities Act; and

              (xiv)  such counsel (A) is of the opinion that (except for
     financial statements and schedules included therein as to which such
     counsel need not express any opinion) each document, if any, filed pursuant
     to the Exchange Act and incorporated by reference in the Prospectus
     complied when so filed as to form in all material respects with the
     Exchange Act and the applicable rules and regulations of the Commission
     thereunder, (B) believes that (except for financial statements and
     schedules as to which such counsel need not express any belief and except
     for that part of the Registration Statement that constitutes the Form T-l)
     each part of the Registration Statement, when such part became effective
     did not, and, as of the date such opinion is delivered, does not contain
     any untrue statement of a material fact or omit to state a material fact
     required to be stated therein or necessary to make the statements therein
     not misleading, (C) is of the opinion that the Registration Statement and
     Prospectus (except for financial statements and schedules included therein
     as to which such counsel need not express any opinion), comply as to form
     in all material respects with the Securities Act and the applicable rules
     and regulations of the Commission thereunder and (D) believes that (except
     for financial statements and schedules as to which such counsel need not
     express any belief) the Prospectus as of the date such opinion is delivered
     does not contain any untrue statement of a material fact or omit to state a
     material fact necessary in order to make the statements therein, in the
     light of the circumstances under which they were made, not misleading.

          (d)  The Representative shall have received on the Closing Date an
opinion dated the Closing Date of Alan D. Dietrich, Esq., Vice President,
Corporate Services of the Company to the effect that the Company is (i) in
compliance with any and all applicable Environmental Laws, (ii) has received all
permits, license or other approvals required of it under applicable
Environmental Laws to conduct its business and (iii) is in compliance with all
terms and conditions of any such permit, license or approval, except where such
noncompliance with


                                      -11-


Environmental Laws, failure to receive required permits, licenses or other
approvals or failure to comply with the terms and conditions of such permits,
licenses or approvals would not, singly or in the aggregate, have a material
adverse effect on the Company.

          (e)  The Representative shall have received on the Closing Date an
opinion dated the Closing Date of Winthrop, Stimson, Putnam & Roberts, counsel
for the Underwriters, covering such matters as the Representative may reasonably
request.

          With respect to subparagraph (xi) of paragraph (c) above, Schiff
Hardin & Waite, special counsel to the Company, may state that its opinion and
belief are based upon its participation in the preparation of the Registration
Statement and Prospectus and any amendments or supplements thereto (excluding
(for purposes of clauses (B) and (D) of such paragraph) certain of the documents
incorporated by reference therein (to be specified in such opinion)) and review
and discussion of the contents thereof (including the documents incorporated by
reference therein),  but are without independent check or verification, except
as specified.

          The opinions of Schiff Hardin & Waite and Alan D. Dietrich, Esq. shall
be rendered to the Underwriters at the request of the Company and shall so state
therein.

          (f)  The Representative shall have received on the date of this
Agreement a letter, dated the date of this Agreement, in form and substance
satisfactory to the Representative, from Arthur Andersen LLP, the Company's
independent public accountants, containing statements and information of the
type ordinarily included in accountants' "comfort letters" to underwriters with
respect to the financial statements and certain financial information contained
in or incorporated by reference into the Prospectus.  Such letter shall include,
without limitation, statements to the effect that (i) the unaudited pro forma
condensed consolidated financial statements included or incorporated by
reference in the Prospectus comply as to form with the applicable accounting
requirements of Rule 11-02 of Regulation S-X, (ii) management's assumptions
provide a reasonable basis for presenting the significant effects directly
attributable to the Acquisition described in the notes to the unaudited pro
forma condensed consolidated financial statements, (iii) the related pro forma
adjustments give appropriate effect to those assumptions, and (iv) the pro forma
column reflects the proper application of those adjustments to the historical
financial statement amounts contained in such unaudited pro forma consolidated
statements.

          (g)  The Representative shall have received on the Closing Date a
letter, dated the Closing Date, in form and substance satisfactory to the
Representative, from Arthur Andersen LLP, the Company's independent public
accountants, to


                                      -12-


the effect that such accountants reaffirm, as of the Closing Date, and as though
made on the Closing Date, the statements made in the letter furnished by such
accountants pursuant to Section 4(f), except that the specified date referred to
therein shall be a date not more than five business days prior to the Closing
Date.

          (h)  The Representative shall have received on the date of this
Agreement a letter, dated the date of this Agreement, in form and substance
satisfactory to the Representative, from KPMG Peat Marwick LLP, Synergy's
independent public accountants, containing statements and information of the
type ordinarily included in accountants' "comfort letters" to underwriters with
respect to the financial statements and certain financial information contained
or incorporated by reference into the Prospectus.

          (i)  At the Closing Date, the Firm Shares shall have been approved for
listing on the New York Stock Exchange upon notice of issuance.

          The several obligations of the Underwriters to purchase Additional
Shares hereunder are subject to the delivery to the Representative on the Option
Closing Date of such documents as the Representative may reasonably request.

          5.   COVENANTS OF THE COMPANY.  In further consideration of the
agreements of the Underwriters herein contained, the Company covenants as
follows:

          (a)  To furnish the Representative, without charge, a signed copy of
the Registration Statement (including exhibits thereto) and to deliver to each
other Underwriter a conformed copy of the Registration Statement (without
exhibits thereto) and, during the period mentioned in paragraph (c) below, as
many copies of the Prospectus, any documents incorporated by reference therein
and any supplements and amendments thereto or to the Registration Statement as
the Underwriters may reasonably request (delivery of the Prospectus to be made
in New York, New York no later than 10:00 A.M. on the business day immediately
succeeding the date of this Agreement).

          (b)  To cause the Prospectus to be filed with the Commission pursuant
to and in compliance with Rule 424 under the Act.

          (c)  Before amending or supplementing the Registration Statement or
the Prospectus, to furnish to the Underwriters a copy of each such proposed
amendment or supplement and not to file any such proposed amendment or
supplement to which the Underwriters reasonably object.

          (d)  If, during such period after the first date of the public
offering of the Shares as in the opinion of counsel for


                                      -13-


the Underwriters the Prospectus is required by law to be delivered in connection
with sales by an Underwriter or dealer, any event shall occur or condition exist
as a result of which it is necessary to amend or supplement the Prospectus in
order to make the statements therein, in the light of the circumstances when the
Prospectus is delivered to a purchaser, not misleading, or if, in the opinion of
counsel for the Underwriters, it is necessary to amend or supplement the
Prospectus to comply with law, forthwith to prepare, file with the Commission
and furnish, at its own expense, to the Underwriters, and to the dealers (whose
names and addresses the Representative will furnish to the Company) to which
Shares may have been sold by the Underwriters on behalf of the Underwriters and
to any other dealers upon request, either amendments or supplements to the
Prospectus so that the statements in the Prospectus as so amended or
supplemented will not, in the light of the circumstances when the Prospectus is
delivered to a purchaser, be misleading or so that the Prospectus, as amended or
supplemented, will comply with law.

          (e)  To endeavor to qualify the Shares for offer and sale under the
securities or Blue Sky laws of such jurisdictions as the Underwriters shall
reasonably request and to maintain such qualification for as long as the
Underwriters shall reasonably request.

          (f)  To make generally available to the Company's security holders and
to the Representative as soon as practicable an earning statement covering a
twelve month period beginning on the first day of the first full fiscal quarter
after the date of the Underwriting Agreement, which earning statement shall
satisfy the provisions of Section 11(a) of the Securities Act and the rules and
regulations of the Commission thereunder.  If such fiscal quarter is the last
fiscal quarter of the Company's fiscal year, such earning statement shall be
made available not later than 90 days after the close of the period covered
thereby and in all other cases shall be made available not later than 45 days
after the close of the period covered thereby.

          (g)  Whether or not any sale of Shares is consummated, to pay all
expenses incident to the performance of its obligations under the Underwriting
Agreement, including:  (i) the preparation and filing of the Registration
Statement and the Prospectus and all amendments and supplements thereto, (ii)
the preparation, issuance and delivery of the Shares, (iii) the fees and
disbursements of the Company's counsel and accountants, (iv) the qualification
of the Shares under securities or Blue Sky laws in accordance with the
provisions of Section 5(d), including filing fees and the fees and disbursements
of counsel for the Underwriters in connection therewith and in connection with
the preparation of any Blue Sky Memoranda in an aggregate amount not to exceed
$10,000, (v) the printing and delivery to the Underwriters in quantities as
hereinabove stated of copies of the Registration Statement and all amendments
thereto and of the Prospectus and any amendments or supplements thereto,
(vi) the


                                      -14-


fees and expenses, if any, incurred with respect to any filing with the National
Association of Securities Dealers, Inc., and (vii) the fees and expenses
incurred in connection with the listing of the Shares on any securities
exchange.

          (h)  During the period ending [90] days after the date of this
Agreement, without the prior written consent of Morgan Stanley & Co.
Incorporated, not to (1) offer, pledge, sell, contract to sell, sell any option
or contract to purchase, purchase any option or contract to sell, grant any
option, right or warrant to purchase, or otherwise transfer or dispose of,
directly or indirectly, any shares of common stock of the Company or any
securities convertible into or exercisable or exchangeable for such common
stock, other than (i) the Shares to be sold hereunder and (ii) any shares of
such common stock sold by the Company upon the exercise of an option or warrant
or the conversion of a security outstanding on the date hereof or (2) enter into
any swap or similar arrangement that transfers, in whole or in part, the
economic risk of ownership of the common stock of the Company, whether any such
transaction described in clause (1) or (2) above is to be settled by delivery of
common stock or such other securities, in cash or otherwise.

          (i)  To use its reasonable efforts to cause each of its current
executive officers and directors to refrain, during the period ending [90] days
after the date of this Agreement, without the prior written consent of Morgan
Stanley & Co. Incorporated, from (1) offering, pledging, selling, contracting to
sell, selling any option or contract to purchase, purchasing any option or
contract to sell, granting any option, right or warrant to purchase or otherwise
transferring or disposing of, directly or indirectly, any shares of common stock
of the Company or any securities convertible into or exercisable or exchangeable
for such common stock, other than any shares of such common stock sold by such
executive officers and directors upon the exercise of an option or warrant or
the conversion of a security outstanding on the date hereof or (2) entering into
any swap or similar arrangement that transfers, in whole or in part, the
economic risk of ownership of the common stock of such executive officers and
directors, whether any such transaction described in clause (1) or (2) above is
to be settled by delivery of common stock or such other securities in cash or
otherwise.

          6.   INDEMNIFICATION AND CONTRIBUTION.  (a)  The Company agrees to
indemnify and hold harmless each Underwriter and each person, if any, who
controls such Underwriter within the meaning of either Section 15 of the
Securities Act or Section 20 of the Exchange Act from and against any and all
losses, claims, damages and liabilities (including, without limitation, any
legal or other expenses reasonably incurred by any Underwriter or any such
controlling person in connection with investigating or defending any such action
or claim) caused by any untrue statement or alleged untrue statement of a
material fact contained in the Registration Statement or any amendment thereof,


                                      -15-


any preliminary prospectus or the Prospectus (as amended or supplemented if the
Company shall have furnished any amendments or supplements thereto), or caused
by any omission or alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein not misleading,
except insofar as such losses, claims, damages or liabilities are caused by any
such untrue statement or omission or alleged untrue statement or omission based
upon information relating to any Underwriter furnished to the Company in writing
by such Underwriter expressly for use therein.

          (b)  Each Underwriter agrees, severally and not jointly, to indemnify
and hold harmless the Company, its directors, its officers who sign the
Registration Statement and each person, if any, who controls the Company within
the meaning of either Section 15 of the Securities Act or Section 20 of the
Exchange Act to the same extent as the foregoing indemnity from the Company to
such Underwriter, but only with reference to information relating to such
Underwriter furnished to the Company in writing by such Underwriter expressly
for use in the Registration Statement, any preliminary prospectus, the
Prospectus or any amendments or supplements thereto.

          (c)  In case any proceeding (including any governmental investigation)
shall be instituted involving any person in respect of which indemnity may be
sought pursuant to either paragraph (a) or (b) above, such person (the
"indemnified party") shall promptly notify the person against whom such
indemnity may be sought (the "indemnifying party") in writing and the
indemnifying party, upon request of the indemnified party, shall retain counsel
reasonably satisfactory to the indemnified party to represent the indemnified
party and any others the indemnifying party may designate in such proceeding and
shall pay the fees and disbursements of such counsel related to such proceeding.
In any such proceeding, any indemnified party shall have the right to retain its
own counsel, but the fees and expenses of such counsel shall be at the expense
of such indemnified party unless (i) the indemnifying party and the indemnified
party shall have mutually agreed to the retention of such counsel or (ii) the
named parties to any such proceeding (including any impleaded parties) include
both the indemnifying party and the indemnified party and representation of both
parties by the same counsel would be inappropriate due to actual or potential
differing interests between them.  It is understood that the indemnifying party
shall not, in respect of the legal expenses of any indemnified party in
connection with any proceeding or related proceedings in the same jurisdiction,
be liable for the fees and expenses of more than one separate firm (in addition
to any local counsel) for all such indemnified parties and that all such fees
and expenses shall be reimbursed as they are incurred.  Such firm shall be
designated in writing by the Representative, in the case of parties indemnified
pursuant to paragraph (a) above, and by the Company, in the case of parties
indemnified pursuant to paragraph (b) above.  The


                                      -16-


indemnifying party shall not be liable for any settlement of any proceeding
effected without its written consent, but if settled with such consent or if
there be a final judgment for the plaintiff, the indemnifying party agrees to
indemnify the indemnified party from and against any loss or liability by reason
of such settlement or judgment.  Notwithstanding the foregoing sentence, if at
any time an indemnified party shall have requested an indemnifying party to
reimburse the indemnified party for fees and expenses of counsel as contemplated
by the second and third sentences of this paragraph, the indemnifying party
agrees that it shall be liable for any settlement of any proceeding effected
without its written consent if (i) such settlement is entered into more than 30
days after receipt by such indemnifying party of the aforesaid request and (ii)
such indemnifying party shall not have reimbursed the indemnified party in
accordance with such request prior to the date of such settlement.  No
indemnifying party shall, without the prior written consent of the indemnified
party, effect any settlement of any pending or threatened proceeding in respect
of which any indemnified party is or could have been a party and indemnity could
have been sought hereunder by such indemnified party, unless such settlement
includes an unconditional release of such indemnified party from all liability
on claims that are the subject matter of such proceeding.

          (d)  To the extent the indemnification provided for in paragraph (a)
or (b) of this Section 6 is unavailable to an indemnified party or insufficient
in respect of any losses, claims, damages or liabilities referred to therein,
then each indemnifying party under such paragraph, in lieu of indemnifying such
indemnified party thereunder, shall contribute to the amount paid or payable by
such indemnified party as a result of such losses, claims, damages or
liabilities (i) in such proportion as is appropriate to reflect the relative
benefits received by the Company on the one hand and the Underwriters on the
other hand from the offering of the Shares or (ii) if the allocation provided by
clause (i) above is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause (i)
above but also the relative fault of the Company on the one hand and of the
Underwriters on the other hand in connection with the statements or omissions
that resulted in such losses, claims, damages or liabilities, as well as any
other relevant equitable considerations.  The relative benefits received by the
Company on the one hand and the Underwriters on the other hand in connection
with the offering of the Shares shall be deemed to be in the same respective
proportions as the net proceeds from the offering of such Shares (before
deducting expenses) received by the Company and the total underwriting discounts
and commissions received by the Underwriters, in each case as set forth in the
table on the cover of the Prospectus Supplement, bear to the aggregate public
offering price of the Shares.  The relative fault of the Company on the one hand
and of the Underwriters on the other hand shall be determined by reference to,
among other things, whether the


                                      -17-


untrue or alleged untrue statement of a material fact or the omission or alleged
omission to state a material fact relates to information supplied by the Company
or by the Underwriters and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.
The Underwriters' respective obligations to contribute pursuant to this Section
6 are several in proportion to the respective number of Shares they have
purchased hereunder, and not joint.

          (e)  The Company and the Underwriters agree that it would not be just
or equitable if contribution pursuant to this Section 6 were determined by pro
rata allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation that does not take account of the
equitable considerations referred to in paragraph (d) above.  The amount paid or
payable by an indemnified party as a result of the losses, claims, damages and
liabilities referred to in the immediately preceding paragraph shall be deemed
to include, subject to the limitations set forth above, any legal or other
expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim.  Notwithstanding the
provisions of this Section 6, no Underwriter shall be required to contribute any
amount in excess of the amount by which the total amount of Shares underwritten
by it and distributed to the public were offered to the public exceeds the
amount of any damages that such Underwriter has otherwise been required to pay
by reason of such untrue or alleged untrue statement or omission or alleged
omission.  No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation. The remedies
provided for in this Section 6 are not exclusive and shall not limit any rights
or remedies which may otherwise be available to any indemnified party at law or
in equity.

          7.   TERMINATION.  This Agreement shall be subject to termination, by
notice given by the Representative to the Company, if (a) after the execution
and delivery of the Underwriting Agreement and prior to the Closing Date (i)
trading generally shall have been suspended or materially limited on or by, as
the case may be, any of the New York Stock Exchange, the American Stock
Exchange, the National Association of Securities Dealers, Inc., the Chicago
Board of Options Exchange, the Chicago Mercantile Exchange or the Chicago Board
of Trade, (ii) trading of any securities of the Company shall have been
suspended on any exchange or in any over-the-counter market, (iii) a general
moratorium on commercial banking activities in New York shall have been declared
by either Federal or New York State authorities, or (iv) there shall have
occurred any outbreak or escalation of hostilities or any change in financial
markets or any calamity or crisis that, in the judgment of the Representative,
is material and adverse and (b) in the case of any of the events specified in
clauses (a)(i) through (iv), such


                                      -18-


event, singly or together with any other such event, makes it, in the judgment
of the Representative, impracticable to market the Shares on the terms and in
the manner contemplated in the Prospectus.  This Agreement may also be
terminated at any time prior to the Closing Date if in the judgment of the
Representative the subject matter of any amendment or supplement to the
Registration Statement or Prospectus prepared and furnished by the Company
reflects a material adverse change in the business, properties or financial
condition of the Company and its subsidiaries, taken as a whole, which renders
it either inadvisable to proceed with such offering, if any, or inadvisable to
proceed with the delivery of the Shares to be purchased hereunder.

          8.   DEFAULTING UNDERWRITERS.  If, on the Closing Date or the Option
Closing Date, as the case may be, any one or more of the Underwriters shall fail
or refuse to purchase the Shares that it has or they have agreed to purchase
hereunder on such date, and the aggregate number of Shares which such defaulting
Underwriter or Underwriters agreed but failed or refused to purchase is not more
than one-tenth of the aggregate number of Shares to be purchased on such date,
the other Underwriters shall be obligated severally in the proportions that the
number of Shares set forth opposite their respective names in the Underwriting
Agreement bears to the aggregate number of Shares set forth opposite the names
of all such non-defaulting Underwriters, or in such other proportions as the
Representative may specify, to purchase the Shares which such defaulting
Underwriter or Underwriters agreed but failed or refused to purchase on such
date, PROVIDED that in no event shall the number of Shares that any Underwriter
has agreed to purchase pursuant to this Agreement be increased pursuant to this
Section 8 by an amount in excess of one-ninth of such number of Shares without
the written consent of such Underwriter.  If, on the Closing Date or the Option
Closing Date, as the case may be, any Underwriter or Underwriters shall fail or
refuse to purchase the Shares that it has or they have agreed to purchase and
the aggregate amount of Shares with respect to which such default occurs is more
than one-tenth of the aggregate number of Shares to be purchased on such date,
and arrangements satisfactory to the Representative and the Company for the
purchase of such Shares are not made within 36 hours after such default, the
Underwriting Agreement shall terminate without liability on the part of any non-
defaulting Underwriter or the Company.  In any such case either the
Representative or the Company shall have the right to postpone the Closing Date
or the Option Closing Date, as the case may be, but in no event for longer than
seven days, in order that the required changes, if any, in the Registration
Statement and in the Prospectus or in any other documents or arrangements may be
effected.  Any action taken under this paragraph shall not relieve any
defaulting Underwriter from liability in respect of any default of such
Underwriter under the Underwriting Agreement.


                                      -19-


          If the Underwriting Agreement shall be terminated by the Underwriters,
or any of them, because of any failure or refusal on the part of the Company to
comply with the terms or to fulfill any of the conditions of the Underwriting
Agreement, or if for any reason the Company shall be unable to perform its
obligations under the Underwriting Agreement, the Company will reimburse the
Underwriters or such Underwriters as have so terminated the Underwriting
Agreement with respect to themselves, severally, for all out-of-pocket expenses
(including the fees and disbursements of their counsel) reasonably incurred by
such Underwriters in connection with the Underwriting Agreement or the offering
of the Shares.

          If the Underwriting Agreement shall be terminated by the Company
because of any failure or refusal on the part of the Underwriters to comply with
the terms or to fulfill any of the conditions of the Underwriting Agreement, or
if for any reason the Underwriters shall be unable to perform their obligations
under the Underwriting Agreement, the Underwriters will reimburse the Company
for all out-of-pocket expenses (including the fees and disbursements of its
counsel) reasonably incurred by the Company in connection with the Underwriting
Agreement or the offering of the Shares.

          9.  REPRESENTATIONS AND INDEMNITIES TO SURVIVE.  The respective
indemnity and contribution agreements and the representations, warranties and
other statements of the Company, its officers and the Underwriters set forth in
the Underwriting Agreement will remain in full force and effect, regardless of
any termination of the Underwriting Agreement, any investigation made by or on
behalf of any Underwriter or the Company or any of the officers, directors or
controlling persons referred to in Section 6 and delivery of and payment for the
Shares.

          10.  SUCCESSORS.  This Agreement will enure to the benefit of and be
binding upon the parties hereto and their respective successors and the
officers, directors and controlling persons referred to in Section 6, and no
other person will have any right or obligation hereunder.

          11.  COUNTERPARTS.  The Underwriting Agreement may be signed in any
number of counterparts, each of which shall be an original, with the same effect
as if the signatures thereto and hereto were upon the same instrument.

          12.  APPLICABLE LAW.  The Underwriting Agreement shall be governed by
and construed in accordance with the internal laws of the State of New York.

          13.  HEADINGS.  The headings of the sections of the Underwriting
Agreement have been inserted for convenience of reference only and shall not be
deemed a part of the Underwriting Agreement.


                                      -20-


          14.  NOTICES.  All communications hereunder will be in writing and, if
sent to the Underwriters, will be mailed, delivered or telecopied and confirmed
to Morgan Stanley & Co. Incorporated at 1251 Avenue of the Americas, New York,
New York 10020, Attn: Mr. Jay D. Hatfield or, if sent to the Company, will be
mailed, delivered or telecopied and confirmed to it at 33 Third Street SE,
Huron, South Dakota, 57350, Attn:  Mr. Richard R. Hylland, Vice President --
Finance & Corporate Development, Telecopy No:  (605) 353-8286.

          15.  DEFINITION OF "SUBSIDIARY".  The term "subsidiary," as used in
this Agreement, shall be deemed to refer only to (i) those direct or indirect
subsidiaries of the Company which would qualify as "significant subsidiaries"
pursuant to Rule 405 under the Securities Act, and (ii) SYN Inc.


                                      -21-


          Please confirm your agreement by having an authorized officer sign a
copy of the Underwriting Agreement in the space set forth below.


                                        Very truly yours,

                                        MORGAN STANLEY & CO. INCORPORATED
                                        PAINEWEBBER INCORPORATED

                                        Acting severally on behalf of themselves
                                        and the several Underwriters named
                                        herein

                                        By: MORGAN STANLEY & CO. INCORPORATED



                                        By: _______________________________
                                            Name:
                                            Title:


Accepted, ______ __, 1995

NORTHWESTERN PUBLIC SERVICE COMPANY


By: _______________________________
    Name:
    Title:



                                   SCHEDULE I



                                                   Number
Name of Underwriter                               of Shares
- -------------------                               ---------

Morgan Stanley & Co. Incorporated. . . . . . . .  __________

PaineWebber Incorporated . . . . . . . . . . . .  __________

___________________. . . . . . . . . . . . . . .  __________

___________________. . . . . . . . . . . . . . .  __________

___________________. . . . . . . . . . . . . . .  __________

___________________. . . . . . . . . . . . . . .  __________

___________________. . . . . . . . . . . . . . .  __________
                                                  _______________
                                        Total
                                                  _______________
                                                  _______________