Exhibit 4.11












     ______________________________________________________________________


              HILLSBOROUGH COUNTY INDUSTRIAL DEVELOPMENT AUTHORITY

                                       and

                             TAMPA ELECTRIC COMPANY

     ______________________________________________________________________


                SECOND SUPPLEMENTAL INSTALLMENT PURCHASE CONTRACT

     ______________________________________________________________________

                            Dated as of June 1, 1983

     ______________________________________________________________________

                                   Relating to
                         Pollution Control Revenue Bonds
                        (Tampa Electric Company Project)























                                       55


                                                                Exhibit 4.11





                SECOND SUPPLEMENTAL INSTALLMENT PURCHASE CONTRACT

          This  SECOND SUPPLEMENTAL INSTALLMENT PURCHASE CONTRACT, dated as
     o f   June  1,  1983  (the  "Second  Supplemental  Contract")  to  the
     INSTALLMENT  PURCHASE  CONTRACT,  dated  as  of  August  1,  1981 (the
     "Original  Contract"),  as  supplemented  and  amended  by  the  First
     Supplemental  Installment  Purchase Contract, dated as of May 1, 1982,
     (the  "First  Supplemental Contract") and an Amendment to Exhibit A of
     the  Installment  Purchase  Contract  (the  "Amendment to Exhibit A"),
     dated  April  7,  1983 (said Original Contract as so amended, together
     with  this  Second  Supplemental  Contract,  being  herein  called the
     "Contract"),   by  and  between  the  HILLSBOROUGH  COUNTY  INDUSTRIAL
     DEVELOPMENT  AUTHORITY,  a public body corporate and politic the State
     of  Florida  (the "issuer"), and TAMPA ELECTRIC COMPANY, a corporation
     organized and existing under the laws of the State of Florida:

                              W I T N E S S E T H:

          In consideration of the respective representations and agreements
     hereinafter  contained,  the parties hereto agree as follows (provided
     that  in  the  performance  of  the  agreements  of  the Issuer herein
     contained,  any  obligation  it  may  thereby incur for the payment of
     money shall not be a debt, liability or obligation of any authority or
     county  or  of  the  State  of  Florida  or  any political subdivision
     thereof,  except  to  the  extent that the Bonds hereinafter mentioned
     shall  be  limited  obligations  of  the Issuer, payable solely out of
     moneys derived from the Contract and the Bonds referred to therein):


























                                       56


                                                              Exhibit 4.11




                                    ARTICLE I

                      DEFINITIONS AND RULES OF CONSTRUCTION

          Section  1.1.    Definitions.  (a) All words and terms defined in
     Section  1.1  of the Original Contract and in Section 1.1 of the First
     Supplemental  Contract  shall  have  the  same meanings in this Second
     Supplemental Contract unless otherwise specifically defined herein.

          (b)    In  addition  to words and terms elsewhere defined in this
     Second Supplemental Contract, the following words and terms shall have
     the following meanings:

          "Amendment  to Exhibit A" means the Amendment to Exhibit A of the
     Installment Purchase Contract, dated April 7, 1983, by and between the
     H i llsborough  County  Industrial  Development  Authority  and  Tampa
     Electric Company.

          "Collateral"   means,   collectively,   the   pollution   control
     facilities  described  in  Exhibit  A  to  the  Contract a copy of the
     current form of which Exhibit A is attached hereto and  each component
     thereof  which  has  been  or will be acquired by the Company from the
     Issuer.

          "Contract"  means  the Original Contract, as amended by the First
     Supplemental  Contract  and  the Amendment to Exhibit A, together with
     this   Second  Supplement  Contract  and  any  other  supplements  and
     amendments thereto permitted by the Indenture.

          "First  Mortgage"  means  the  Indenture of Mortgage, dated as of
     August 1, 1946, as supplemented, from the Company to State Street Bank
     and  Trust Company, (formerly State Street Trust Company) and Flagship
     Bank  of  Tampa  (formerly  First  Savings  & Trust Company of Tampa),
     trustees.

          "First   Supplemental  Contract"  means  the  First  Supplemental
     Installment Purchase Contract, dated as of May 1, 1982, by and between
     the  Hillsborough  County  Industrial  Development Authority and Tampa
     Electric Company.

          "First Supplemental Indenture" means the First Supplemental Trust
     Indenture,  dated,  as of May 1, 1983, by and between the Hillsborough
     County  Industrial  Development  Authority and Exchange Bank and Trust
     Company of Florida (now NCNB National Bank of Florida).

          " I ndenture"  means  the  Original  Indenture,  as  amended  and
     supplemented  by  the  First Supplemental Indenture, together with the
     Second  supplemental  Indenture,  pursuant  to which (i) the Bonds are
     authorized  to  be  issued  and  (ii)  the  Issuer's  rights under the
     Contract  (except  the  Issuer's rights under Sections 5.1 (c) and 9.4
     hereof  to payment of certain costs and expenses and under Section 7.4
     hereof   to  indemnification),  including  the  subordinated  security
     interest  in  the  Collateral  and the Purchase Price Installments and

                                       57


                                                               Exhibit 4.11

     other  revenues and proceeds receivable by the Issuer from the sale of
     the  Project,  are pledged and assigned as security for the payment of
     principal  of  and  premium,  if  any,  and  interest on the Bonds, as
     amended  or  supplemented  by  any amendments or supplements permitted
     thereby.

          "Original  Contract"  means  the  Installment  Purchase Contract,
     dated  as  of  August  1, 1981, by and between the Hillsborough County
     Industrial Development Authority and Tampa Electric Company.

          "Original  Indenture"  means  the  Trust  Indenture,  dated as of
     August  1,  1981,  by  and  between the Hillsborough County Industrial
     Development  Authority and Exchange Bank and Trust Company of Florida,
     Tampa, Florida (now NCNB National Bank of Florida).

          "Second  Supplemental  Contract"  means  this Second Supplemental
     Installment  Purchase  Contract,  as  amended  and supplemented by any
     amendments and supplements hereto permitted by the Indenture.

          "Second  Supplemental  Indenture"  means  the Second Supplemental
     Trust  Indenture,  dated  as  of  June  1,  1983,  by  and between the
     Hillsborough County Industrial Development Authority and NCNB National
     Bank  of  Florida  (formerly,  Exchange  Bank  and  Trust  Company  of
     F l orida),  Tampa,  Florida,  as  amended  and  supplemented  by  any
     amendments and supplements thereto permitted by the Indenture.

          "Subordinated  Security Interest" means the subordinated security
     interest in the Collateral created by Section 5.3 hereof.

          Section  1.2.   Rules of Construction.  The rules of construction
     set  forth in Section 1.2 of the Original Contract shall be applicable
     to this Second Supplemental Contract.

























                                       58

                                                               Exhibit 4.11


                                   ARTICLE II

                                 REPRESENTATIONS

          Section 2.1  Representations by the Issuer.  The Issuer makes the
     following  representations,  as of the date of delivery of this Second
     Supplemental Contract:

               (a)    The Issuer is duly authorized under the provisions of
          t h e  Act  to  enter  into,  execute  and  deliver  this  Second
          Supplemental Contract, to undertake the transactions contemplated
          by  this  Second  Supplemental  Contract  and  to  carry  out its
          obligations  hereunder,  and  the  Issuer has duly authorized the
          execution and delivery of this Second Supplemental Contract; and

               (b)     The  Issuer  has  heretofore  agreed  to  cause  the
          completion  of  the acquisition, construction and installation of
          the  Project,  pursuant  to the terms and conditions expressed in
          the  Contract,  all  for  the  purpose of promoting effective and
          efficient pollution control throughout the State of Florida.

          Section  2.2   Representations by the Company.  The Company makes
     the  following  representations,  as  of  the date of delivery of this
     Second Supplemental Contract:

               (a)    The  Company  is a corporation organized and existing
          under  the  laws  of  the State of Florida and has power to enter
          into this Second Supplemental Contract;

               (b)   By proper corporate action, the officers executing and
          attesting  this  Second  Supplemental  Contract  have  been  duly
          authorized  to  execute  and  deliver  this  Second  Supplemental
          Contract;

               (c)    Neither  the  execution  or  delivery  of this Second
          Supplemental  Contract  nor  the consummation of the transactions
          contemplated  herein,  nor  the fulfillment of or compliance with
          the  terms hereof will conflict with or result in a breach of any
          of the terms or provisions of, or constitute a default under, the
          Company's Restated Articles of Incorporation, its by-laws, or any
          indenture,   mortgage,  deed  of  trust  or  other  agreement  or
          instrument  to which the Company is now a party or by which it is
          bound;













                                       59


                                                                Exhibit 4.11


               (d)    All necessary authorizations, approvals, consents and
          other  orders  of  any  governmental  authority or agency for the
          execution and delivery by the Company of this Second Supplemental
          Contract have been obtained and are in full force and effect.




















































                                       60


                                                                Exhibit 4.11



                                   ARTICLE III

                            AMENDMENT AND SUPPLEMENT

          Section 3.1  Creation of Subordinated Security Interest.  Article
     V  of  the Original Contract as is hereby amended by adding at the end
     thereof a new Section 5.3 as follows:

          "Section 5.3.  Creation  of  Subordinated  Security Interest.  As
     security  for  the performance by the Company of its obligations under
     Section  5.1(a)  hereof,  the  Company  hereby  grants to the Issuer a
     subordinated security interest in the Collateral and in each component
     thereof  which  has  been or will be acquired hereunder by the Company
     from  the  Issuer.    It  is  agreed that the security interest hereby
     granted  (including  the Issuer's rights of possession or repossession
     of  the  Collateral  or any rights conferred upon the Issuer under the
     Uniform  Commercial  Code  of  the  State of Florida or  otherwise) is
     hereby  made,  and shall at all times be, subject to (i) the rights of
     the  holders  of  the  First  Mortgage  Bonds (as defined in the First
     Mortgage)  of the Company issued ad outstanding or to be issued under,
     and  the  lien  of  the  First  Mortgage  and (ii) any future security
     interest   or  lien  created  to  secure  any  indebtedness  or  other
     obligations  of  the  Company  now  existing  or hereinafter issued or
     incurred  under  any  indenture  or  other  instrument which expressly
     provides  that  any  such  security  interest  or  lien  securing such
     indebtedness or obligations shall be superior to the security interest
     hereby  granted;  provided  that  nothing in said First Mortgage or in
     such other instrument or indenture or in this Section 5.3 shall affect
     or  diminish  the  obligations  of  the  Company under Section 5.1 (a)
     hereof.    Such  security  interest  shall  remain in effect until the
     Company  shall  have  satisfied  its  obligations under Section 5.1(a)
     hereof at which time the Issuer shall cause the execution and delivery
     to  the  Company  of such documents as shall be necessary to effect or
     evidence the termination of such security interest."

          S e c t ion  3.2.    Execution  of  Counterparts.    This  Second
     S u pplemental  Installment  Purchase  Contract  maybe  simultaneously
     executed  in  several counterparts, each of which shall be an original
     and all of which shall constitute but one and the same instrument.
















                                       61

                                                               Exhibit 4.11

          IN WITNESS WHEREOF, the  Issuer  and the Company have caused this
     Second  Supplemental Contract to be executed in their respective names
     by  their  duly  authorized  officers and their respective seals to be
     hereunto  affixed  and  attested by their duly authorized officers for
     and  on  their  behalves  and the Trustee has consented to this Second
     Supplemental Contract all as of the date first above written.

                                             HILLSBOROUGH COUNTY INDUSTRIAL
                                                  DEVELOPMENT AUTHORITY


                                        By ____________________________
                                           Chairman of the Hillsborough
                                           County Industrial Development
                                           Authority

     OFFICIAL SEAL

     Attest:


     ______________________________
     Asst. Secretary

                                             Approved by General Counsel to
                                             the   Hillsborough  Industrial
                                             Development  Authority  as  to
                                             form and legal sufficiency


                                             By ____________________________
                                                Warren M. Cason, Esq.
























                                       62

                                                               Exhibit 4.11

                                             TAMPA ELECTRIC COMPANY


                                        By _____________________________
                                           Senior Vice President-Finance
     CORPORATE SEAL

     Attest:


     ____________________________
     Secretary

                                             CONSENT:

                                             NCNB NATIONAL BANK OF FLORIDA
                                                  Trustee


                                             By___________________________
                                                Vice President



































                                       63

                                                              Exhibit 4.11


     STATE OF FLORIDA         )
                              )  ss.:
     COUNTY OF HILLSBOROUGH   )

          The  foregoing  instrument was acknowledged before me this 22 day
     of  June, 1983, by SAMUEL I. LATIMER, the Chairman of the Hillsborough
     County Industrial Development Authority, the public body corporate and
     politic and public instrumentality described in and which executed the
     above instrument.


                                             
     ________________________________
                                                       Notary Public

     (NOTARIAL SEAL)                         My commission expires:


     STATE OF FLORIDA         )
                              )  ss.:
     COUNTY OF HILLSBOROUGH   )

          The  foregoing  instrument was acknowledged before me this 22 day
     of  June,  1983,  by  Ellswotth  G.  Simmons,  Asst.  Secretary of the
     Hillsborough  County Industrial Development Authority, the public body
     corporate ad politic and public instrumentality described in and which
     executed the above instrument.


                                             
     ________________________________
                                                       Notary Public

     (NOTARIAL SEAL)                         My commission expires:






















                                       64


                                                               Exhibit 4.11



     STATE OF FLORIDA         )
                              )  ss.:
     COUNTY OF HILLSBOROUGH   )

          The  foregoing  instrument was acknowledged before me this 23 day
     of  June,  1983,  by  J.K.  TAGGART,  a Senior Vice President of Tampa
     Electric Company, on behalf of said corporation.


                                             
     ________________________________
                                                       Notary Public


     (NOTARIAL SEAL)                         My commission expires:



     STATE OF FLORIDA         )
                              )  ss.:
     COUNTY OF HILLSBOROUGH   )

          The  foregoing  instrument was acknowledged before me this 23 day
     of  June,  1983,  by  J.E.  SPROULL,  the  Secretary of Tampa Electric
     Company, on behalf of said corporation.


                                             
     ________________________________
                                                       Notary Public


     (NOTARIAL SEAL)                         My commission expires:






















                                       65

                                                               Exhibit 4.11



                                                                 EXHIBIT A


                           DESCRIPTION OF THE PROJECT

          The  Project  referred to in the Installment Purchase Contract to
     which this Exhibit A is attached consists of certain pollution control
     facilities  to be acquired, constructed and installed at Unit No. 4 of
     the Big Bend Station of Tampa Electric Company in Hillsborough County,
     Florida, more particularly described as follows:

     BIG BEND UNIT NO. 4

          A.   Electrostatic Precipitator

               Particulate  control  for  Big  Bend  Unit  No.  4  will  be
          a c c omplished  by  the  use  of  a  rigid  frame  electrostatic
          precipitator.     The  precipitator  is  designed  for  a  99.7+%
          p a rticulate  removal  efficiency  and  includes  the  following
          associated  equipment:  ductwork and breaching, structural steel,
          foundations,  pilings, hoppers/hopper heat tracing and electrical
          power and control devices.

               1.   Precipatator Flyash Storage Silo

                    This silo is a cylindrical tank supported by structural
               steel  columns.    The  associated  equipment  includes  bag
               filter,   vent  controls,  weigh  scale,  pumps,  supporting
               structural steel, foundations and piling.

               2.   Storage Ponds

                    Earthen storage ponds with dikes to a maximum elevation
               of 35 feet will be provided for the storage of flyash in the
               event  flyash cannot be marketed.  These ponds will be lined
               to protect the ground water systems from leachate.

               3.   Piping

                    This  item  consists of the necessary piping, pumps and
               c o ntrols  to  convey  the  precipitator  flyash  from  the
               precipitator  hoppers  by way of a dry  vacuum system to the
               flyash  silo.    From dry flyash silo, flyash is transported
               wet  by  way  of  piping  to  the above noted flyash storage
               ponds.










                                       66


                                                             Exhibit 4.11



          B.   Bottom Ash Removal

               1.   Hoppers

                    Steel hoppers collect ash which falls out the bottom of
               the  pulverized  fuel furnace.  Included with the bottom ash
               h o p per  are  the  necessary  structural  steel  supports,
               foundations, pilings, and associated electrical controls.

               2.   Ponds

                    Bottom  ash  storage  ponds are provided for storage of
               the  collected  bottom ash.  The initial or primary settling
               pond receives the water from the ash hoppers.  This water is
               then  decanted  and  recycled to the plant for reuse.  After
               the  primary  ponds  are  filled, they will be hydraulically
               dredged  to  a  more  permanent long term storage pond.  The
               primary decanting or settling receiving ponds will be lined;
               the  larger  more  permanent bottom ash storage pond will be
               unlined.

               3.   Piping

                    This  item  includes the necessary piping to sluice the
               bottom  ash  slurry  from  the  hoppers  to  the  bottom ash
               receiving  ponds.    Also  included are the piping and pumps
               required  to return the water to the plant for reuse in this
               ash system.

          C.   Flue Gas Desulfurization System (FGD System)

               1.   Description of System

                    The type of FGD System selected for Big Bend Unit No. 4
               is a two stage forced oxidation limestone regenerable system
               designed to have an efficiency between eighty-five to ninety
               percent  (85%-90%).    The  FGD System consists of three (3)
               modules  with  one  (1)  spare.  The modules will consist of
               booster  fans,  quenchers,  absorbers,  absorber  feed tank,
               associated piping and pumps.  Reheat fans and a reheater are
               provided  to reheat the exiting gas flow from the FGD System
               to  provide  the  necessary buoyancy and drying requirements
               for the exiting stack gas.  

               2.   Limestone Preparation

                    Included  with  the  FGD  System  are the raw limestone
               facilities  required  for  receiving,  unloading,  grinding,
               preparation,  and  transfer  of  limestone to the FGD System
               proper.     The  limestone  unloading  and  handling  system
               i n cludes  all  necessary  controls,  structural  supports,
               foundations and piling required.

               3.   FGD Waste Handling

                                       67

                                                              Exhibit 4.11

                    Another  major  portion  of the FGD System is the waste
               handling  facility.    This system includes a building which
               houses   the  necessary  dewatering,  separation,  treatment
               equipment  and  is  for processing the gypsum waste from the
               FGD  System,  plus transfer facilities for moving the gypsum
               from  the  waste  handling  building  to the on-site storage
               area.    This  area  includes  a  stacking  system  and  the
               necessary  ponding  and  containment  ditches for the gypsum
               pile runoff.

          D.   Liquid Waste Treatment

               The  waste  treatment system for Big Bend Unit no. 4 will be
          an extension of the existing waste treatment systems for Big Bend
          Units  No.  1,  2  and  3.    The  floor drains are collected and
          transferred  to  a  common reinforced concrete transfer sump with
          all  necessary  pumping  and  piping  and  then transported to an
          existing  settling  pond  before  return  to the plant for use as
          recycle water for equipment wash down.

          E.   Fine Mesh Screens

               Fine  mesh  traveling water screens and associated equipment
          will be installed in the circulating water system to remove small
          marine  organisms  from the circulating water system.  The caught
          organisms  will  be  collected with a low pressure screenwash and
          returned via a flume to Tampa Bay.

          F.   Sanitary Waste Streams

               A d ditional  sanitary  water  treatment  capacity  will  be
          installed  with  Unit No. 4.  The discharge from this system will
          be piped to the waste water transfer sump described above.
























                                       68

                                                               Exhibit 4.11


              BIG BEND UNIT NO. 4 COAL HANDLING AND BLENDING SYSTEM

                    A.   Coal Pile Runoff System Modifications

                         The  existing  coal  pile runoff collection system
                    will  be  modified so as to collect the runoff from the
                    extended   and  modified  coal  handling  and  blending
                    system.    The collected runoff water will be monitored
                    prior to returning this water to the bay.

                    B.   Dust Suppression Equipment

                         Dust suppression equipment will be provided at all
                    major  transfer  points  in  the  newly  installed coal
                    h a ndling  and  blending  system.    This  suppression
                    equipment  will  consist  of either water sprays and/or
                    vacuum  type  bag  filters.   A dust suppression system
                    will  also be included in the tripper room over the top
                    of the blending bins.





































                                       69

                                                               Exhibit 4.11








________________________________________________________________________

            HILLSBOROUGH COUNTY INDUSTRIAL DEVELOPMENT AUTHORITY

                                    and

                       NCNB NATIONAL BANK OF FLORIDA,

                                                  Trustee

                    ___________________________________
                    SECOND SUPPLEMENTAL TRUST INDENTURE

                          Dated as of June 1, 1983

                             _________________





                                Relating to

                      Pollution Control Revenue Bonds
                      (Tampa Electric Company Project)

























                                     70

                                                              Exhibit 4.11

                    SECOND SUPPLEMENTAL TRUST INDENTURE

     THIS  SECOND  SUPPLEMENTAL  TRUST  INDENTURE, dated as of June 1, 1983
(herein called the "Second Supplemental Indenture") to the TRUST INDENTURE,
dated  as  of  August  1, 1981 (herein called the "Original Indenture"), as
supplemented  and amended by the First Supplemental Trust Indenture (herein
called  the  "First Supplemental Indenture"), dated as of May 1, 1982 (said
trust  indenture  as so amended and, together with this Second Supplemental
Indenture  and  any    supplements  and amendments thereafter, being herein
called  the "Indenture"), by and between the HILLSBOROUGH COUNTY INDUSTRIAL
DEVELOPMENT  AUTHORITY,  a  public  body corporate and politic and a public
instrumentality  created  pursuant  to  the  laws  of  the State of Florida
(herein  called the "Issuer"), and NCNB NATIONAL BANK OF FLORIDA (formerly,
Exchange  Bank and Trust Company of Florida) a national banking association
duly  organized and existing under the laws of the United States of America
and  having  its  principal  office in the City of Tampa, Florida, which is
authorized  under  such  laws  to  exercise  corporate  trust powers and is
subject to examination by federal authorities (said banking association and
any  bank  or trust company becoming successor trustee under the Indenture,
being herein called the "Trustee").

                            W I T N E S S E T H:

     WHEREAS,  the Issuer is authorized by Part III of Chapter 159, Florida
Statutes,  as  amended  (herein called the "ACT"), to finance and refinance
c a pital  projects  including  industrial  and  manufacturing  plants  and
pollution control facilities with appurtenant facilities for the purpose of
promoting effective and efficient pollution control throughout the State of
Florida  and including pollution control facilities or devices incorporated
as  a  part  of  any project and to issue revenue bonds payable solely from
revenues  derived  from  the  sale,  operation  or  leasing of such capital
projects; and

     WHEREAS,  the  Issuer  has  heretofore made the necessary arrangements
with  Tampa  Electric  Company (herein called the "Company"), a corporation
duly organized and existing under the laws of the State of Florida, for the
acquisition,  construction and installation by the Issuer of the "Project",
as  described  in  Exhibit A to the Contract (hereinafter mentioned), which
Project  is  of the character of projects permitted by, and will accomplish
the purposes of, the Act; and

















                                     71

                                                              Exhibit 4.11

     WHEREAS, the Issuer has entered into an Installment Purchase Contract,
dated  as  of  August  1, 1981, (herein called the "Original Contract"), as
amended  and  supplemented  by  a  First  Supplemental Installment Purchase
Contract,  dated  as  of  May 1, 1982, and an Amendment to Exhibit A of the
Installment Purchase Contract (herein called the "Amendment to Exhibit A"),
dated  April  7,  1983  (said  Original  Contract,  as  so  amended  and as
supplemented  by  the  Second  Supplemental  Installment  Purchase Contract
hereinafter  mentioned  and  any  other  amendments  or supplements thereto
permitted  by  the Indenture, being herein called the "Contract"), with the
Company,  pursuant  to  which  the  Issuer has sold to the Company, and the
Company  has  purchased from the Issuer, all the Issuer's rights, title and
interest  in  the  Project  at  a  purchase  price which, together with the
interest  thereon,  is payable in installments (herein called the "Purchase
Price  Installments")  in  amounts  sufficient  to pay the principal of and
premiums,  if any, and interest on the Bonds issued to pay a portion of the
Cost (as defined in the Contract) of the Project; and

     WHEREAS,  for  the  purpose of providing funds to pay a portion of the
Cost  of  the  Project,  the  Issuer  heretofore  authorized, pursuant to a
resolution  duly  adopted  on  May  11, 1981, the issuance of not exceeding
$ 2 50,000,000  aggregate  principal  amount  of  its  Hillsborough  County
Industrial  Development  Authority  Pollution  Control Revenue Bonds (Tampa
Electric Company Project; and

     WHEREAS, pursuant to resolutions duly passed and adopted by the Issuer
on  May  11,  1981  and  August 5, 1981, the Issuer determined to issue and
sell,  pursuant  to  Section 208 of the Indenture, a series of said revenue
bonds,  designated "Pollution Control Revenue Bonds (Tampa Electric Company
Project),  Series  "A", dated as of August 1, 1981 (said bonds being herein
called  the  "Series  A  Bonds"),  in  the  aggregate  principal  amount of
$25,000,000 and to reserve the remaining $225,000,000 of said revenue bonds
for future issuance; and

     WHEREAS, pursuant to a resolution duly passed and adopted on April 28,
1982,  the  Issuer determined to issue and sell, pursuant to Section 209 of
the  Indenture,  a  series  of revenue bonds, designated "Pollution Control
Revenue Bonds (Tampa Electric Company Project), Series "B", dated as of May
1,  1982,  in the aggregate principal amount of $100,000,000 and to reserve
the remaining $125,000,000 of said revenue bonds for future issuance; and


















                                     72


                                                               Exhibit 4.11

     WHEREAS,  the Issuer will enter into a Second Supplemental Installment
Purchase  Contract,  dated  as  of  June 1, 1983 (herein called the "Second
Supplemental  Contract")  with  the  Company, pursuant to which the Company
will grant to the Issuer to the extent described in the Second Supplemental
Contract  a  subordinated security interest in the Collateral as defined in
the  Second Supplemental Contract (herein called the "Subordinated Security
Interest"); and

     WHEREAS,  the  execution  and  delivery  of  this  Second Supplemental
Indenture and the Second Supplemental Contract have been duly authorized by
a  resolution  of  the  Issuer,  as permitted by Articles XI and XII of the
Indenture; and

     WHEREAS,  all acts, conditions and things required by the Constitution
and  laws  of  the  State  of  Florida  to  happen,  exist and be performed
precedent  to and in the execution and delivery of this Second Supplemental
Indenture  and  the  Second  Supplemental Contract have happened, exist and
have been performed as so required in order to make the Original Indenture,
as amended by the First Supplemental Indenture and this Second Supplemental
Indenture,  a  valid  and  binding  trust indenture for the security of the
Bonds  in  accordance  with  its  terms  and  in order to make the Original
Contract,  as  amended by the First Supplemental Contract, the Amendment to
Exhibit  A  and  the  Second  Supplemental  Contract,  a  valid and binding
installment purchase contract in accordance with its terms; and

     WHEREAS,  the  Trustee  has accepted the trusts created by this Second
Supplemental  Indenture and in evidence thereof has joined in the execution
hereof;

     NOW,  THEREFORE,  THIS SECOND SUPPLEMENTAL TRUST INDENTURE WITNESSETH,
that  in consideration of the premises, of the acceptance by the Trustee of
the  trusts hereby created, and also for and in consideration of the sum of
One  Dollar  ($1.00) to the Issuer in hand paid by the Trustee at or before
the  execution  and  delivery  of  this  Second Supplemental Indenture, the
receipt of which is hereby acknowledged, and in order further to secure the
payment  of  the  principal  of  all  the  Bonds  at  any  time  issued and
outstanding  hereunder  and  the  premium, if any, and the interest thereon
according  to  their  tenor,  purport  and  effect, and in order further to
secure  the performance and observance of all the covenants, agreements and
conditions  therein  and  herein  contained,  the  Issuer  has executed and
delivered  this  Second Supplemental Indenture and has pledged and assigned
and  does hereby pledge and assign to the Trustee its Subordinated Security
Interest  in  the  Collateral, all as security for the payment of the Bonds
and  the  premium,  if  any,  and  interest thereon and as security for the
satisfaction  of any other obligation assumed by it in connection with such
Bonds,  and  it  is  so  mutually  agreed and covenanted by and between the
parties  hereto,  for  the  equal  and  proportionate benefit and security,
except  as otherwise hereinafter expressly provided, of al and singular the
present  and  future  holders  of  the  Bonds  and the coupons appertaining
thereto  issued  and to be issued under this Indenture, without preference,
priority  or  distinction  as  to  lien  or  otherwise, except as otherwise
hereinafter  expressly  provided,  of  any one Bond over any other Bond, by
reason of priority in the issue, sale or negotiation thereof or otherwise;

     PROVIDED,  HOWEVER,  that  if, after the rights, title and interest of
the  Trustee  in  and  to  the  estate pledged and assigned to it under the

                                     73


                                                               Exhibit 4.11

Indenture and this Supplemental Indenture shall have ceased, terminated and
become  void  in  accordance  with  Article  XIII of the Indenture, and the
principal  of  and  premium, if any, and interest on all of the Bonds shall
have  been  paid  to the Bondholders and the bearers of interest coupons or
shall  have  been  paid  to  the  Company  pursuant  to  Section 505 of the
Indenture,  then  the  Indenture  and  all  covenants, agreements and other
obligations  of  the Issuer thereunder and hereunder shall cease, determine
and  be  void,  and  thereupon  the Trustee shall cancel and Issuer and the
Company  such  instruments  in writing as shall be required to evidence the
discharge  thereof;  otherwise  the  Indenture is to be and shall remain in
full force and effect.
     THIS SECOND SUPPLEMENTAL TRUST INDENTURE FURTHER WITNESSETH, and it is
expressly  declared  that  all Bonds issued and secured under the Indenture
are  to  be issued, authenticated and delivered and all said Purchase Price
Installments,  revenues  and  other  income  and  moneys hereby pledged and
assigned,  are  to be dealt with and disposed of under, upon and subject to
the  terms,  conditions, stipulations, covenants, agreements, trusts, users
and  purposes  as  hereinafter  expressed,  and  the  Issuer has agreed and
covenanted,  and  does hereby agree and covenant, with the Trustee and with
the  respective  holders  and  owners,  from  time to time, of the Bonds or
coupons, or any part thereof, as follows, that is to say:




































                                     74

                                                             Exhibit 4.11


                                 ARTICLE I

                   DEFINITIONS AND RULES OF CONSTRUCTION

     Section 101.  Definitions.  All words and terms defined in Section 1.1
of  the  Original  Contract, as amended by the First Supplemental Contract,
the Amendment to Exhibit A and the Second Supplemental Contract, and in the
Original  Indenture,  as  amended by the First Supplemental Indenture shall
have  the  same  meanings  in  this  Second  Supplemental Indenture, unless
otherwise  specifically  defined  herein.   All terms used herein which are
defined  in the recitals hereto shall have the meanings there given to them
unless the context otherwise requires.

     Section  102.    Rules of Construction.  The rules of construction set
forth  in Section 102 of the Original Indenture shall be applicable to this
Second Supplemental Indenture.

                                 ARTICLE II

                                 SUPPLEMENT

     Section  201.    Subordinated  Security  Interest.    Article V of the
Indenture  is hereby amended by adding at the end thereof a new Section 507
as follows:

     "Section  507.    Termination of Subordinated Security interest.  Upon
satisfaction by the Company of its obligations under Section 5.1 (a) of the
Contract, the Trustee shall cause the execution and delivery to the Company
of  such  documents  as  shall  be  necessary  to effect or to evidence the
termination of the Subordinated Security Interest."


























                                     75


                                                              Exhibit 4.11


     Section 202.  Counterparts.  This Second Supplemental Indenture may be
executed  in multiple counterparts, each of which shall be regarded for all
purposes as an original, and such counterparts shall constitute but one and
the same instrument.

     I N   WITNESS  WHEREOF,  HILLSBOROUGH  COUNTY  INDUSTRIAL  DEVELOPMENT
AUTHORITY  has  caused this Second Supplemental Indenture to be executed by
its  Chairman and its official seal to be impressed thereon and attested by
its  Secretary,  and NCNB NATIONAL BANK OF FLORIDA (formerly, Exchange Bank
and Trust Company of Florida) has caused this Second Supplemental Indenture
to  be  executed by a Vice President and its corporate seal to be impressed
thereon  and  attested by an Corporate Trust Officer for and on its behalf,
all as of the date first above written.

                                        HILLSBOROUGH COUNTY INDUSTRIAL
                                             DEVELOPMENT AUTHORITY


(Seal)                                  By______________________________
                                                  Chairman


                                        Approved by General Counsel
                                        to the Hillsborough County
                                        Industrial Development
___________________________             Authority
Asst. Secretary


                                        By______________________________
                                             Warren M. Cason, Esq.


                                        NCNB NATIONAL BANK OF FLORIDA


                                        By______________________________
(Seal)

Attest:



___________________________
Corporate Trust Officer











                                     76

                                                              Exhibit 4.11

STATE OF FLORIDA         )
                         ) ss.:
COUNTY OF HILLSBOROUGH   )

     The  foregoing  instrument  was  acknowledged before me this 22 day of
June,  1983,  by SAMUEL I. LATIMER, the Chairman of the Hillsborough County
Industrial Development Authority, the public body corporate and politic and
p u b lic  instrumentality  described  in  and  which  executed  the  above
instrument.


                                        ________________________________
                                             Notary Public

(NOTARIAL SEAL)                         My commission expires:


STATE OF FLORIDA         )
                         ) ss.:
COUNTY OF HILLSBOROUGH   )

     The  foregoing  instrument  was  acknowledged before me this 22 day of
June, 1983, by Ellsworth G. Simmons, Asst. Secretary of Hillsborough County
Industrial Development Authority, the public body corporate and politic and
p u b lic  instrumentality  described  in  and  which  executed  the  above
instrument.


                                        ________________________________
                                             Notary Public

(NOTARIAL SEAL)                         My commission expires:

























                                     77

                                                              Exhibit 4.11

STATE OF FLORIDA         )
                         ) ss.:
COUNTY OF HILLSBOROUGH   )

     The  foregoing  instrument  was  acknowledged  before me this June 23,
1983, by EDGAR L. TROCKE a Vice President of NCNB NATIONAL BANK OF FLORIDA,
the  national banking association described in and which executed the above
instrument on behalf of said national banking association.


                                        ________________________________
                                             Notary Public

                                        My commission expires:

(NOTARIAL SEAL)     



STATE OF FLORIDA         )
                         ) ss.:
COUNTY OF HILLSBOROUGH   )

     The  foregoing  instrument  was  acknowledged  before me this June 23,
1983,  by RENEE COCHELL, a Corporate Trust Officer of NCNB NATIONAL BANK OF
FLORIDA,  the  national banking association described in and which executed
the above instrument on behalf of said national banking association.


                                        ________________________________
                                             Notary Public

                                        My commission expires:

(NOTARIAL SEAL)






















                                     78