[EXHIBIT 10tt TO COLONIAL GAS COMPANY
         FORM 10-K FOR YEAR ENDED DECEMBER 31, 1995]


                                            Contract No. R-480-01

                            
                            AMENDMENT
                 TO GAS TRANSPORTATION CONTRACT
                        FOR FIRM SERVICE


      THIS  AMENDMENT,  made and entered into  this  1st  day  of
September 1995, by and between IROQUOIS GAS TRANSMISSION  SYSTEM,
L.P.,   a  Delaware  limited  partnership  ("Transporter"),   and
COLONIAL GAS COMPANY, a Massachusetts Corporation ("Shipper").
      WHEREAS,  Transporter and Shipper  are  parties  to  a  Gas
Transportation Contract for Firm Service dated February 7,  1991,
designated  as  Transporter's Contract No.  R-480-01,  ("Contract
01") which provides for transportation service by Transporter  of
up  to  2,000  Mcf  per day of natural gas on behalf  of  Shipper
between  the interconnection points on Transporter's natural  gas
system  at  Waddington, New York and Wright,  New  York  for  the
period November 1, 1991 to November 1, 2011;
      WHEREAS,  Transporter and Shipper  are  parties  to  a  Gas
Transportation Contract for Firm Service dated November 25, 1991,
designated  as  Transporter's Contract No.  R-480-03,  ("Contract
03") which provides for transportation service by Transporter  of
up  to  4,000  Mcf  per day of natural gas on behalf  of  Shipper
between  the interconnection points on Transporter's natural  gas
system  at  Waddington, New York and Wright,  New  York  for  the
period  December  1,  1991  until a superceding  agreement  takes
effect;
      WHEREAS, Transporter and Shipper mutually desire  to  amend
Contract  01 to provide for additional transportation service  of
4,000 Mcf per day under the same terms and conditions as provided
in Contract 01 for a revised total contract quantity of 6,000 Mcf
per day.
       WHEREAS,  Transporter  and  Shipper  mutually  desire   to
terminate  Contract  03 under the same terms  and  conditions  as
provided in Contract 03 under Article V, Section 3.
      NOW  THEREFORE,  in consideration of the premises  and  the
mutual covenants herein contained, Transporter and Shipper hereby
agree to (1) amend the Contract 01 by modifying the Maximum Input
Quantity  and  Maximum  Equivalent Quantity  of  Schedule  1  and
Schedule  2 to read "6,000 Mcf/d" and "The thermal equivalent  of
6,000  Mcf/d", respectively; and (2) terminate Contract 03 as  of
September  1,  1995.   The  amendment to  Contract  01  shall  be
effective  as  of  September  1,  1995.   All  other  terms   and
conditions of Contract 01 shall remain the same.
      IN  WITNESS  WHEREOF, the parties hereto have  caused  this
Amendment to be duly executed as of the date first above written.

                              IROQUOIS GAS TRANSMISSION SYSTEM, L.P.
                              By Its Agent
ATTEST:                       IROQUOIS PIPELINE OPERATING COMPANY



/s/ Joan Pastore              /s/ Bernard M. Otis
                              Bernard M. Otis
                              Vice President, Transmission


ATTEST:

/s/ Joan Pastore	      /s/ Paul Bailey
                              Paul Bailey
                              Vice President,  Finance &
Administration


ATTEST:                       COLONIAL GAS COMPANY

/s/ Susan Mousseau            /s/ John P. Harrington
			      John P. Harrington
			      Senior Vice President - Gas Supply
                              and Assistant to the President


			
    [END OF EXHIBIT 10tt TO COLONIAL GAS COMPANY
     FORM 10-K FOR YEAR ENDED DECEMBER 31, 1995]