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Exhibit 10.10    
    


[PLAINS MARKETING, L.P. LETTERHEAD] 


October
04, 2006 


Presco
Western, LLC

5480 Valmont

Suite 350

Boulder, CO 80304

Fax: (303) 417-1000 


	RE:
	PMLP
Amendment September 01, 2006-2

PMLP Contract: 4765 1001 



Gentlemen: 


Please
amend the subject contract by adding and/or deleting the following well(s) effective as shown. 



	Add

Delete
	 	PMLP

Number
	 	Well

Name
	 	Operator
	 	County/State
	 	Effective

	Add	 	137580	 	NANNING A TRUST 34-E	 	PRESCO WESTERN LLC	 	HASKELL, KS	 	Sept 01 2006





Please see Exhibit "A" attached for pricing purposes. 


Except
as herein amended, all other terms and conditions of said contract shell remain in full force and effect. 


This
fax evidences our understanding of the entire agreement and shall constitute the formal contract. Please acknowledge by return fax your acceptance of and agreement to the terms stated herein.
Unless we receive notice of your objections within five (5) business days, we will consider this agreement as final and binding on both patties. 



The
parties agree that faxed documents shall be deemed to be admissible as primary evidence in a court of law as original or as counterparts of the original documents, either of which are to be
retained end available for inspection. 


Very
truly yours, 


PLAINS
MARKETING, L.P.

By Plains Marketing GP Inc.

Its General Partner 



	/s/  MIKE A. WELLER      
 Mike A. Weller

Director, Rocky Mountain Region

and Attorney in Fact	 	 	 	 










Plains Marketing LP.



	Plains contact:	 	4765-1001	 	Effective: 09-01-2006	 	Exhibit "A"	 	Partner contact: Please Provide	 	Oct 04, 2006
	 	 	 	 	 	 	 	 	 	 	Page 1 of 2





   





	PM

Lease

*Inact
 
	 	Lease
	 	Operator
	 	County/

Parish
	 	State
	 	Price

Code
	 	Price

Method**
	 	Applicable

Premium or

(Deduct)
	 	Percent
	 	Gravity
	 	State

Lease

	106346	(1)	LARSON #1-731	 	PRESCO WESTERN LLC	 	FINNEY	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0oAPI	 	 
	106347	 	JEHLE #1-1624	 	PRESCO WESTERN LLC	 	FINNEY	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	111935	 	GRANT-MAURICE	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	114313	 	GARNER 1-1624	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	114317	 	ANTON 2-518	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	117240	(1)	PEREZ 1-531	 	PRESCO WESTERN LLC	 	FINNEY	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	118051	 	ELS PROPERTIES 1-1030	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0oAPI	 	 
	118168*	 	MEGAN JANAE 1-30	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	118339	 	MCKINLEY 1-519	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	123592	 	IRENE 1-1632	 	PRESCO WESTERN LLC	 	FINNEY	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	125003	 	JLM FARMS #1 1A27	 	PRESCO WESTERN LLC	 	FINNEY	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	126122	 	WESTERN FEEDYARD	 	PRESCO WESTERN LLC	 	STANTON	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	126353	 	BLACK CENTRAL TANK	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	126437	 	MILES 1 11-28	 	PRESCO WESTERN LLC	 	KEARNY	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	129608	 	ROGER WILSON	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	131515	 	STOCKER FACILITY	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	131551	 	SWALOR A-1	 	PRESCO WESTERN LLC	 	STEVENS	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	131552	 	SWALOR B-1	 	PRESCO WESTERN LLC	 	STEVENS	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	131553	 	BLACKWELL A-1	 	PRESCO WESTERN LLC	 	MORTON	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	131624	 	KISEL 1-1215 #2	 	PRESCO WESTERN LLC	 	KEARNY	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	131711	 	COX 6-P	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	131729	 	BLACK TRUST	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	131749	 	E. HALL	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	135729	 	LUCAS TRUST 4K29-30-38	 	PRESCO WESTERN LLC	 	GRANT	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0oAPI	 	 
	135748	 	GCC 1-530	 	PRESCO WESTERN LLC	 	FINNEY	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	135872	 	MCKINLEY 15-P	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	137528	 	BERGNER 7-P	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0o API	 	 
	137530	 	NANNING A TRUST 34-E	 	PRESCO WESTERN LLC	 	HASKELL	 	KS	 	S2092	 	EDQ	 	$	3.3000	 	100.00000	%	Deemed 40.0oAPI	 	 






	(1)
	Allocated
under 995156 LARSON/PETITZ STORAGE



	(*)
	S2092
PLAINS MARKETING LP-SOUTHWESTERN KANSAS SWEET



	(**)
	EQUAL
DAILY QUANTITIES 











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Exhibit 10.10