Exhibit 10.8(f)
                                                                 ---------------


                             THIRD AMENDMENT TO THE
                            POWER PURCHASE AGREEMENT
                                    BETWEEN
                                ZOND WINDSYSTEM
                                PARTNERS, LTD.,
                                  SERIES 85-C
                                      AND
                        PACIFIC GAS AND ELECTRIC COMPANY
                             (PG&E LOG NO. 01W017)


     THIS  THIRD  AMENDMENT  ("Amendment")  is by and  between  PACIFIC  GAS AND
ELECTRIC  COMPANY  ("PG&E"),  a  California   corporation  and  Zond  Windsystem
Partners, Ltd., Series 85-C ("Seller"),  a California limited partnership.  PG&E
and  Seller  are  sometimes  referred  to herein  individually  as  "Party"  and
collectively as the "Parties."

                                    RECITALS

     A. On January 17, 1985 Seller (or Seller's predecessor,  as applicable) and
PG&E entered into a Power Purchase Agreement (as amended,  the "PPA"),  pursuant
to which PG&E  purchases  electric  power from Seller and Seller sells  electric
power to PG&E.

     B. On April 6, 2001,  PG&E filed a voluntary  petition  under chapter 11 of
the United States  Bankruptcy  Code in the San Francisco  Division of the United
States Bankruptcy Court for the Northern District of California (the "Bankruptcy
Court") (In re Pacific Gas and Electric Company, Bankr. Case No. 01-03923).

     C. On June 14, 2001, the California Public Utilities Commission (the
"Commission") issued Decision 01-06-015, which approved as reasonable certain
non-standard PPA energy price modifications.

     D.  Seller  and  PG&E  now  desire  to  enter  into  the PPA  energy  price
modification set forth below.

                                     1 of 3





                                   AMENDMENT

     In  consideration  of the mutual promises and covenants  contained  herein,
PG&E and Seller agree to modify the Agreement as follows:

     1. FIXED ENERGY PRICE
        ------------------

          Upon approval by the Bankruptcy Court as specified in Section 2 below,
     the energy price term specified in the PPA (PG&E's "full short-run  avoided
     costs"  or "full  short-run  avoided  operating  costs" as the case may be)
     shall be replaced for the lesser of the  remaining  term of the PPA or five
     years with the applicable energy prices as specified in Attachment A, which
     is hereby incorporated by reference.  Upon approval by the Bankruptcy Court
     as specified in Section 2 below,  such amended  energy  prices shall become
     effective  on July 16,  2001,  at 00:00 PPT. No  provision of the PPA other
     than the energy price term is or shall be deemed to be  modified,  amended,
     waived or  otherwise  affected  by this  Amendment.  The  Parties  agree to
     reasonably   cooperate  and  contest  any  challenge  in  any   Commission
     proceeding that seeks to alter or modify the energy pricing terms set forth
     in  Attachment  A,  including,  but not  limited to, any  challenge  to the
     reasonableness of PG&E having entered into this Amendment.

     2. EFFECTIVENESS OF AMENDMENT

          This Amendment shall not become effective unless and until it has been
     approved by the Bankruptcy  Court. If the Bankruptcy Court has not approved
     this  Amendment  by  August  15,  2001,  this  Amendment  shall be deemed a
     nullity.

                                     2 of 3





     3. SIGNATURES

        IN WITNESS  WHEREOF,  Seller and PG&E have caused this  Amendment  to be
executed by their authorized representatives.

PACIFIC GAS AND ELECTRIC COMPANY
A California corporation
By: /s/  ?
    --------------------------
Title:  Director USPM
Date:  7/14/01

ZOND WINDSYSTEM PARTNERS, LTD.,
SERIES 85-C
A California limited partnership

By ZOND WINDSYSTEMS
MANAGEMENT CORPORATION V, its
General Partner
By:  /s/ John A. Lamb
    --------------------------------
Title:  Asst. Sec.
Date 11-13-01

                                     3 of 3





                                  Attachment A

                        Pacific Gas and Electric Company

       FIXED ENERGY PRICES FOR QUALIFYING FACILITIES UNDER D.01-06-015 [1]
       -------------------------------------------------------------------
                      Effective through December 31, 2001




                                                                                             

                           Starting                                                                         2001 TOU
                           Energy                           2001 TOU         SRAC TF        2001 TOU        Energy
                           Value                            Hours            Base [2]       Factor [3]      Price [4]
                           $/kwh                                                                            $/kwh
                          -----------------------------------------------------------------------------------------------
                            (a)                               (b)             (c)               (d)         (e) = a*d

Allocation of Annual Fixed Price to Seasons:                                                Without Time-of Use Metering:
- -------------------------------------------
Period A - Summer          0.053700                         4,417            0.018748       0.879           0.047181
Period B - Winter          0.053700                         4,343            0.023973       1.123           0.060330
Annual Average             0.053700                         8,760            0.021338                       0.053700



Allocation of Seasonal Prices to TOU Periods:
- --------------------------------------------

Period A - Summer                                                                           With Time-of-Use Metering:
Peak                       0.047181                           774                           1.065           0.050248
Partial-Peak               0.047181                           903                           1.022           0.048219
Off-Peak                   0.047181                         2,003                           0.985           0.046465
Super Off-Peak             0.047181                           737                           0.946           0.044633



Period B - Winter
Peak                             --                            -                               --                 --
Partial-Peak               0.060330                         1,612                           1.032           0.062261
Off-Peak                   0.060330                         2,008                           0.992           0.059866
Super Off-Peak             0.060330                           723                           0.950           0.057314




1.   These energy prices are derived solely for purposes of implementing
     the five-year energy price (5.37 cents/kwh) option in CPUC Decision (D.)
     01-06-015. These prices will be reallocated annually using appropriate
     TOU calendar hours.

2.   SRAC TF Base values reflect the seasonal allocation factors currently
     specified in PG&E's SRAC Transition Formula, as adopted by the CPUC in
     D.96-12-028. Seasonal values reflect the Base SRAC energy prices adopted
     in D.96-12-028. The annual average value shown derives from weighting the
     seasonal values by TOU period hours.

3.   TOU factors allocate the fixed annual energy price for seasons, and
     seasonal values for time-of-use periods. Seasonal TOU factors are derived
     from the ratio of the season SRAC TF Base values to the average annual
     value shown. Intraseasonal TOU factors are as adopted in D.96-12-028
     (as corrected in CPUC D.97-01-027).  Off-peak period values are calculated
     using seasonal period hours for the applicable year, per the following:




                                                 


         Period A (May 1 - October 31)               Period B (November 1 - April 30)
    ---------------------------------------      ----------------------------------------------
     [Total Summer hours- (1.065*Summer
     Peak hours) - (1.022*Summer Partial Peak      [Total Winter hours - (1.032*Winter Partial-
      hours) - (0.946*Summer Super Off-Peak        Peak hours)-(0.950*Winter Super Off-Peak
       hours)]/Summer Off-Peak hours hours)          hours)]/Winter Off-Peak hours.





4.   TOU energy price is the product of the starting energy value and the TOU
     factor. Energy prices shown do not include applicable line loss
     adjustments. Line loss adjustments will be determined in accordance with
     CPUC D.01-01-007.