Document:

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                                                                    Exhibit 10.9

                       GENERAL ASSIGNMENT AND BILL OF SALE

                  THIS GENERAL ASSIGNMENT AND BILL OF SALE is entered into this
17th day of December, 1999 by and among, PP&L Global, Inc., a Pennsylvania
corporation ("PP&L Global"), Colstrip Comm Serv, LLC, a Delaware limited
liability company ("Comm Serv"), and PP&L Montana, LLC, a Delaware limited
liability company ("PP&L Montana") (PP&L Global, Comm Serv and PP&L Montana are
collectively referred to herein as "Assignees" and individually, as "Assignee"),
and The Montana Power Company, a Montana corporation ("Seller").

                  WHEREAS, Seller and PP&L Global have entered into an Asset
Purchase Agreement, dated as of October 31, 1998 as amended June 29, 1999 and
October 29, 1999 (as amended, the "Asset Purchase Agreement"; capitalized terms
not defined herein shall have the meanings ascribed to them in the Asset
Purchase Agreement), pursuant to which Seller has agreed to sell, transfer,
convey, assign and deliver to PP&L Global and PP&L Global has agreed to purchase
and acquire from Seller the Generating Assets and certain other assets of Seller
used or held for use principally in connection with the operation of the
Generating Assets, and PP&L Global has agreed, in partial consideration
therefor, to assume certain obligations in connection therewith by executing an
Assumption Agreement of even date herewith;

                  WHEREAS, the Asset Purchase Agreement provides that PP&L
Global may assign its interests in the Asset Purchase Agreement to a Subsidiary,
provided that such Subsidiary agrees in writing to be bound by the Asset
Purchase Agreement and provided, further, that no such assignment shall relieve
PP&L Global;

                  WHEREAS, PP&L Global has formed Comm Serv and PP&L Montana,
both indirect wholly-owned Subsidiaries of PP&L Global; and by Instrument of
Assignment (the "Assignment") dated the date hereof PP&L Global assigned all of
its rights, interests and obligations under the Asset Purchase Agreement to Comm
Serv and PP&L Montana, as follows: (A) to Comm Serv, that portion of such
rights, interests and obligations as relates to the Specified Assets (the term
"Specified Assets" has the meaning ascribed to it in the Assignment); and (B) to
PP&L Montana, the balance of such rights, interests and obligations;

                  WHEREAS, Seller desires to transfer and assign to Assignees
the assets described below pursuant to Section 1.05 of the Asset Purchase
Agreement and Assignees desire to accept the sale, transfer, conveyance,
assignment and delivery thereof;

NOW, THEREFORE, for and in consideration of the mutual covenants contained
herein and other good and valuable consideration the receipt and sufficiency of
which are hereby acknowledged, Seller hereby irrevocably sells, transfers,
conveys, assigns and delivers all of Seller's right, title and interest in, to
and under the Assets, free and clear of all Liens except

Gen. Assign. & Bill of Sale Execution Copy
<PAGE>   2
Permitted Liens (as such term is defined in the Asset Purchase Agreement with
respect to periods after the date of the Closing), to Assignees, as follows: (i)
to Comm Serv, the Specified Assets (the "Comm Serv Assets") and (ii) to PP&L
Montana, the balance of the Assets (the "PP&L Montana Assets") (collectively the
Comm Serv Assets and PP&L Montana Assets are referred to herein as the "Assigned
Assets"), TO HAVE AND TO HOLD the same unto Assignees, their successors and
assigns, forever.

                  Assignees hereby accept the sale, transfer, conveyance,
assignment and delivery of the Assigned Assets. Notwithstanding anything herein
to the contrary, the Excluded Assets are specifically excluded from the Assigned
Assets and shall be retained by Seller at and following the date of the Closing.

                  At any time or from time to time after the date hereof, at the
request of either Comm Serv or PP&L Montana and without further consideration,
Seller shall execute and deliver to such Assignee such other instruments of
sale, transfer, conveyance, assignment and confirmation, provide such materials
and information and take such other actions as such Assignee may reasonably deem
necessary or desirable in order more effectively to transfer, convey and assign
to such Assignee, and to confirm such Assignee's title to, the Assigned Assets
assigned to such Assignee, and, to the full extent permitted by Law, to put such
Assignee in actual possession and operating control of the Assigned Assets
assigned to such Assignee and to assist such Assignee in exercising all rights
with respect thereto.

                  Seller hereby constitutes and appoints (i) Comm Serv, as to
Comm Serv Assets and (ii) PP&L Montana, as to PP&L Montana Assets, the true and
lawful attorneys of Seller, with full power of substitution, in the name of
Seller or the appropriate Assignee, but on behalf of and for the benefit of the
appropriate Assignee: (i) to demand and receive from time to time any and all of
the Assigned Assets assigned to such Assignee and to make endorsements and give
receipts and releases for and in respect of the same and any part thereof; (ii)
to institute, prosecute, compromise and settle any and all Actions or
Proceedings that such Assignee may deem proper in order to collect, assert or
enforce any claim, right or title of any kind in or to the Assigned Assets
assigned to such Assignee; (iii) to defend or compromise any or all Actions or
Proceedings in respect of any of the Assigned Assets assigned to such Assignee;
and (iv) to do all such acts and things in relation to the matters set forth in
the preceding clauses (i) through (iii) as such Assignee shall deem desirable.
Seller hereby acknowledges that the appointment hereby made and the powers
hereby granted are coupled with an interest and are not and shall not be
revocable by it in any manner or for any reason. Assignees shall indemnify and
hold harmless Seller and its officers, directors, employees, agents and
Affiliates from any and all Losses caused by or arising out of any breach of Law
by Assignees in their exercise of the aforesaid powers.

                  This General Assignment and Bill of Sale may be executed in
any number of counterparts, each of which will be deemed an original, but all of
which together will constitute one and the same instrument.

                                       2

Gen. Assign. & Bill of Sale Execution Copy
<PAGE>   3
                  This General Assignment and Bill of Sale and all of the
provisions hereof shall be binding upon and shall inure to the benefit of the
respective parties and their assigns, transferees and successors.

                  This General Assignment and Bill of Sale shall be governed by
and construed in accordance with the laws of the State of New York applicable to
a contract executed and performed in such State without giving effect to the
conflicts of laws principles thereof, except that if it is necessary in any
other jurisdiction to have the law of such other jurisdiction govern this
General Assignment and Bill of Sale in order for this General Assignment and
Bill of Sale to be effective in any respect, then the laws of such other
jurisdiction shall govern this General Assignment and Bill of Sale to such
extent.

                  This General Assignment and Bill of Sale is delivered pursuant
to and is subject to the Asset Purchase Agreement. In the event of any conflict
between the terms of the Asset Purchase Agreement and the terms of this General
Assignment and Bill of Sale, the terms of the Asset Purchase Agreement shall
prevail.

                                       3

Gen. Assign. & Bill of Sale Execution Copy
<PAGE>   4
                  IN WITNESS WHEREOF, the undersigned have caused their duly
authorized officers to execute this General Assignment and Bill of Sale on the
day and year first above written.

                                 PP&L Global, Inc.

                                 By:      /s/ Robert W. Burke
                                          -----------------------------------
                                                   Signature

                                          Robert W. Burke
                                          -----------------------------------
                                                   Printed Name

                                          Vice President
                                          -----------------------------------
                                                   Title

                                          12-17-99
                                          -----------------------------------
                                                   Date

                                 Colstrip Comm Serv, LLC

                                 By:      /s/ Roger Petersen
                                          -----------------------------------
                                                   Signature

                                          Roger Petersen
                                          -----------------------------------
                                                   Printed Name

                                          President
                                          -----------------------------------
                                                   Title

                                          12/17/99
                                          -----------------------------------
                                                   Date

                                 PP&L Montana, LLC

                                 By:      /s/ Roger Petersen
                                          -----------------------------------
                                                   Signature

                                          Roger Petersen
                                          -----------------------------------
                                                   Printed Name

                                          President
                                          -----------------------------------
                                                   Title

                                          12/17/99
                                          -----------------------------------
                                                   Date

                                       4

Gen. Assign. & Bill of Sale Execution Copy
<PAGE>   5
                                 The Montana Power Company

                                 By:      /s/ Michael E. Zimmerman
                                          -----------------------------------
                                                   Signature

                                          Michael E. Zimmerman
                                          -----------------------------------
                                                   Printed Name

                                          Vice President and General Counsel
                                          -----------------------------------
                                                   Title

                                          12/17/99
                                          -----------------------------------
                                                   Date

                                       5

Gen. Assign. & Bill of Sale Execution Copy<PAGE>   1
                                                                   Exhibit 10.10

                       ASSIGNMENT AND ASSUMPTION AGREEMENT
                            (COLSTRIP 1&2 AGREEMENTS)

         THIS ASSIGNMENT AND ASSUMPTION AGREEMENT (Colstrip 1&2 Agreements)
(this "Assignment Agreement") is made and entered into as of the 17th day of
December, 1999, by and between THE MONTANA POWER COMPANY, a Montana corporation,
("MPC"), and PP&L MONTANA, LLC, a Delaware limited liability company (PP&L
Montana").

                                    RECITALS

         A. MPC and Puget Sound Power & Light Company (now Puget Sound Energy,
Inc.) ("Puget") are parties to that certain Construction and Ownership Agreement
dated July 30, 1971, as amended October 21, 1998 ("Colstrip 1&2 Ownership
Agreement");

         B. MPC and Puget are parties to that certain Agreement for the
Operation and Maintenance of Colstrip Steam Electric Generating Plant, Rosebud
County, Montana, commonly referred to as the Colstrip Units 1 and 2 Operating
Agreement, made as of July 30, 1971 ("Colstrip 1&2 Operating Agreement");

         C. MPC, Puget and Western Energy Company are parties to that certain
Coal Supply Agreement commonly referred to as the Colstrip 1&2 Coal Supply
Agreement, entered into on July 30, 1971, as amended by the Amendment Correcting
Coal Supply Agreement signed in December 1977, ("Colstrip 1&2 Coal Supply
Agreement"), such agreement subject to the Opinion of Arbitrator dated March 17,
1995;

         D. MPC, Puget, Portland General Electric Company ("Portland"), The
Washington Water Power Company (now Avista Corp.), and Pacific Power & Light
Company (now PacifiCorp) are parties to that certain Common Facilities
Agreement, Colstrip Units #1, #2, #3, and #4, dated May 6, 1981, as amended
January 21, 1992 ("Common Facilities Agreement");

         E. MPC and Puget are parties to that certain Agreement Relating to
Clean Air Act Compliance Colstrip Units 1&2, made as of October 31, 1994, as
amended April 2, 1996 ("Colstrip 1&2 CAA Compliance Agreement");

         F. The Colstrip 1&2 Ownership Agreement, the Colstrip 1&2 Operating
Agreement, the Colstrip 1&2 Coal Supply Agreement, the Colstrip 1&2 CAA
Compliance Agreement, and the Common Facilities Agreement (but only insofar as
such agreement relates to the portion of the Common Facilities thereunder
allocated to Colstrip Units #1 And #2 as part of the "Project", as defined in
the Colstrip 1&2 Ownership Agreement) are collectively referred to herein as the
"Assigned Agreements";

         G. MPC and PP&L Global, Inc., a Pennsylvania corporation ("PP&L
Global"), entered into that certain Asset Purchase Agreement dated as of October
31, 1998, as amended June 29,1999, and October 29, 1999 (as amended, the "Asset
Purchase Agreement"), pursuant to which MPC has agreed to sell to PP&L Global,
and PP&L Global has agreed to purchase from

A&A Agmt (Colstrip 1&2 Agmts) Execution Copy
<PAGE>   2
MPC, on the terms and subject to the conditions of the Asset Purchase Agreement,
MPC's interest in certain electric generation related assets, including the
Assigned Agreements;

         H. The Asset Purchase Agreement provides that PP&L Global may assign
its interests in the Asset Purchase Agreement to subsidiaries, and PP&L Global
has formed PP&L Montana, LLC, ("PP&L Montana") a Delaware limited liability
company and an indirect wholly-owned subsidiary of PP&L Global, for the purpose
of assigning to PP&L Montana certain of PP&L Global's interests in the Asset
Purchase Agreement including, without limitation, such interests relating to the
Assigned Agreements;

         I. Pursuant to this Assignment Agreement, subject nevertheless to the
Asset Purchase Agreement, PP&L Montana desires to assume and accept from MPC,
and MPC desires to sell, assign and transfer to PP&L Montana, all of MPC's
rights, title, interests, obligations and liabilities in, to and under the
Assigned Agreements that arise and are attributable to the period after the
Closing under the Asset Purchase Agreement (as used herein "Closing" has the
meaning set forth in the Asset Purchase Agreement), provided, however, that the
parties recognize and agree there are certain pre-Closing liabilities being
assumed by PP&L Montana as provided in the Asset Purchase Agreement;

         J. The assignment and assumption of the Assigned Agreements provided
for by this Assignment Agreement is made pursuant to the respective assignment
provisions in such agreements, and all conditions required for the assignment of
such agreements have been satisfied, including, without limitation, a) the
waiver by Puget of its "right of first refusal" set forth in the Section 16(d)
of the Colstrip 1&2 Ownership Agreement, and b) the consent by Puget set forth
in that certain "Consent and Novation" dated November 1, 1998, entered into by
MPC, Puget, and Portland,

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
set forth herein, and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto hereby agree as
follows:

                                    AGREEMENT

         SECTION 1.  EFFECTIVE DATE

         This Assignment Agreement shall become effective upon the execution and
delivery of this Assignment Agreement by both parties at the Closing (the
"Effective Date").

         SECTION 2.  ASSIGNMENT AND ASSUMPTION

         (a) As of the Effective Date, MPC hereby transfers, assigns and
delegates to PP&L Montana, and PP&L Montana hereby accepts and assumes from MPC,
subject to the terms and provisions of this Assignment Agreement, and the Asset
Purchase Agreement, all of MPC's rights, title, interests, obligations and
liabilities in, to and under the Assigned Agreements that arise and are
attributable to the period after the Effective Date; provided that for purposes
of clarification, (a) PP&L Montana shall not assume any obligations or
liabilities of MPC under the

                                       -2-

A&A Agmt (Colstrip 1&2 Agmts) Execution Copy
<PAGE>   3
Assigned Agreements that arise or are attributable to the period on and prior to
the Effective Date, and (b) MPC shall remain liable only for such obligations
and liabilities of MPC under the Assigned Agreements that arise or are
attributable to the period on and prior to the Effective Date. Notwithstanding
the foregoing, the parties recognize and agree there are certain pre-Closing
liabilities being assumed by PP&L Montana as provided in the Asset Purchase
Agreement.

         (b) Without limiting the generality of the foregoing, MPC and PP&L
Montana acknowledge and agree that encompassed within the scope of such
assignment and assumption is MPC's rights, interests, responsibilities, and
liabilities as the "Operator" of the "Project" (as each such term is defined in
the Colstrip 1&2 Operating Agreement).

         (c) This Assignment Agreement is delivered pursuant to and is subject
to the Asset Purchase Agreement, and shall not be construed to add to or
subtract from the parties' respective rights and responsibilities under the
Asset Purchase Agreement. In the event of any conflict between the terms of the
Asset Purchase Agreement and the terms of this Assignment Agreement, the terms
of the Asset Purchase Agreement shall prevail.

         SECTION 3.  MISCELLANEOUS

         (a) Headings to the sections of this Assignment Agreement are solely
for the convenience of the parties, are not part of this Assignment Agreement,
and shall not be used for the interpretation of, or determination of the
validity of, this Assignment Agreement or any of its provisions.

         (b) No Person (as defined in the Asset Purchase Agreement) other than
the parties to this Assignment Agreement, or such parties' successors and
assigns, shall have any rights under this Assignment Agreement or the provisions
contained herein.

         (c) This Assignment Agreement may be executed in any number of
counterparts, each of which will be deemed an original, but all of which
together will constitute one and the same instrument.

         (d) This Assignment Agreement is binding upon, inures to the benefit
of, and is enforceable by the parties hereto and their respective successors and
assigns. Neither this Assignment Agreement nor any right, interest or obligation
hereunder may be assigned by any party hereto without the prior written consent
of the other party hereto, and any attempt to do so shall be void.

         (e) This Assignment Agreement shall be governed by and construed in
accordance with the laws of the State of New York applicable to contracts
executed and performed in such State without giving effect to the conflicts of
laws principles thereof, except that if it is necessary in any other
jurisdiction to have the law of such other jurisdiction govern this Assignment
Agreement in order for this Assignment Agreement to be effective in any respect,
then the law of such other jurisdiction shall govern this Assignment Agreement
to such extent.

                                       -3-

A&A Agmt (Colstrip 1&2 Agmts) Execution Copy
<PAGE>   4
         IN WITNESS WHEREOF, the parties have caused this Assignment and
Assumption Agreement (Colstrip 1&2 Agreements) to be executed as of the date
first above written.

                                PP&L MONTANA, LLC

                                By:      /s/ Roger Petersen
                                         ---------------------------------------
                                                    Signature

                                         Roger Petersen
                                         ---------------------------------------
                                                    Printed Name

                                         President
                                         ---------------------------------------
                                                    Title

                                         12/17/99
                                         ---------------------------------------
                                                    Date

                                THE MONTANA POWER COMPANY

                                By:      /s/ Michael E. Zimmerman
                                         ---------------------------------------
                                                    Signature

                                         Michael E. Zimmerman
                                         ---------------------------------------
                                                    Printed Name

                                         Vice President & General Counsel
                                         ---------------------------------------
                                                    Title

                                         12/17/99
                                         ---------------------------------------
                                                    Date

                                       -4-

A&A Agmt (Colstrip 1&2 Agmts) Execution Copy

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