UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended ~~June~~September 30, 2010

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD ____________ TO ____________

Commission File Number 000-51309

PDC 2005-A Limited Partnership (Exact name of registrant as specified in its charter)

(Exact name of registrant as specified in its charter)

	West Virginia				20-2088347
(State or other jurisdiction of incorporation or organization)				(I.R.S. Employer Identification No.)

West Virginia	20-2088726
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

1775 Sherman Street, Suite 3000, Denver, Colorado 80203

(Address of principal executive offices) (Zip code)

(303) 860-5800

(Registrant'’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such files) and (2) has been subject to such filing requirements for the past 90 days. Yes þ No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes þ o No ¨o

Indicate by check mark whether the registrant ~~has~~is ~~submitted~~a ~~electronically~~large ~~and~~accelerated ~~posted~~filer, onan ~~its~~accelerated ~~corporate Web site~~filer, ifa ~~any,~~non-accelerated ~~every~~filer ~~Interactive~~or ~~Data~~a ~~File~~smaller ~~required~~reporting tocompany. beSee ~~submitted~~the ~~and~~definition ~~posted pursuant to Rule 405~~ of ~~Regulation~~“large ~~S-T~~accelerated ~~(§232.405~~filer,” of“accelerated ~~this~~filer” ~~chapter)~~and ~~during~~“smaller ~~the~~reporting ~~preceding~~company” 12in ~~months~~Rule ~~(or~~12b-2 ~~for~~of ~~such shorter period that~~ the ~~registrant~~Exchange ~~was required to submit and post such files). Yes ¨ No ¨~~Act:

~~Indicate~~Large ~~by check mark whether the registrant is a large~~ accelerated filer, ano ~~accelerated~~Accelerated filer, ao ~~non~~Non-accelerated filer oro aSmaller ~~smaller~~ reporting company. ~~See the definition of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act:~~þ

~~Large~~Indicate ~~accelerated~~by ~~filer~~check ¨mark ~~Accelerated~~whether ~~filer~~the ¨registrant ~~Non~~is a shell company (as defined in Rule 12b-~~accelerated~~2 ~~filer~~of ¨the ~~Smaller~~Exchange ~~reporting~~Act). ~~company~~Yes o No þ

~~Indicate~~As byof ~~check~~September ~~mark~~30, ~~whether~~2010 the ~~registrant~~Partnership ishad a1,996.87 ~~shell~~units ~~company~~of ~~(as~~limited ~~defined~~partnership ininterest ~~Rule~~and ~~12b-2~~no units of ~~the~~additional ~~Exchange~~general ~~Act). Yes~~partnership ~~¨ No~~interest þoutstanding.

~~As of June 30, 2010 the Partnership had 1,996.87 units of limited partnership interest and no units of additional general partnership interest outstanding.~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

INDEX TO REPORT ON FORM 10-Q

		~~Page~~	Page
	PART I – FINANCIAL INFORMATION
Item 1.	Financial Statements (unaudited)
	Note Regarding Forward-Looking Statements		1
	Condensed Balance Sheets (unaudited)	2
Item 1.	Financial Statements (unaudited)
	Condensed Statements of Operations (unaudited)	3
	Condensed Balance Sheets (unaudited)		2
	Condensed Statements of Cash Flows (unaudited)	4
	Condensed Statements of Operations (unaudited)		3
	Notes to Unaudited Condensed Financial Statements	5
	Condensed Statements of Cash Flows (unaudited)		4
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	11
	Notes to Unaudited Condensed Financial Statements		5
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	21
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		11
Item 4T.	Controls and Procedures	21
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		21
	PART II – OTHER INFORMATION
Item 4.	Controls and Procedures		21
Item 1.	Legal Proceedings	22
	PART II – OTHER INFORMATION
Item 1A.	Risk Factors	22
Item 1.	Legal Proceedings		22
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	22
Item 1A.	Risk Factors		22
Item 3.	Defaults Upon Senior Securities	22
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		22
Item 4.	[Removed and Reserved]	22
Item 3.	Defaults Upon Senior Securities		22
Item 5.	Other Information	22
Item 4.	[Removed and Reserved]		22
Item 6.	Exhibits	23
Item 5.	Other Information		22
	SIGNATURES	24
Item 6.	Exhibits		23
	SIGNATURES		26

~~Index~~INDEX

NOTE REGARDING FORWARD-LOOKING STATEMENTS

This periodic report contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934 (“Exchange Act”) regarding PDC 2005-A Limited Partnership’s (the “Partnership’s” or the “Registrant’s”) business, financial condition, results of operations and prospects.

All statements other than statements of historical facts included in and incorporated by reference into this report are forward-looking statements. Words such as expects, anticipates, intends, plans, believes, seeks, estimates and similar expressions or variations of such words are intended to identify forward-looking statements herein, which include statements of estimated natural gas and oil production and reserves, drilling plans, future cash flows, anticipated liquidity, anticipated capital expenditures and the Managing General Partner Petroleum Development Corporation’s (“PDC’s”) strategies, plans and objectives. However, these words are not the exclusive means of identifying forward-looking statements herein. PDC now conducts business under the name “PDC Energy.”

Although forward-looking statements contained in this report reflect the Managing General Partner'’s good faith judgment, such statements can only be based on facts and factors currently known to the Managing General Partner. Consequently, forward-looking statements are inherently subject to risks and uncertainties, including risks and uncertainties incidental to the development, production and marketing of natural gas and oil, and actual outcomes may differ materially from the results and outcomes discussed in the forward-looking statements. Important factors that could cause actual results to differ materially from the forward-looking statements include, but are not limited to:

·● changes in production volumes, worldwide demand, and commodity prices for natural gas and oil; ● changes in estimates of proved reserves; ● declines in the values of the Partnership’s natural gas and oil properties resulting from impairments; ● the timing and extent of the Partnership’s success in further developing and producing the Partnership’s natural gas and oil reserves; ● the Managing General Partner’s ability to acquire drilling rig services, supplies and services at reasonable prices; ● risks incident to the refracturing and operation of natural gas and oil wells; ● future production and refracturing costs; ● the availability of Partnership future cash flows for investor distributions or funding of Well Refracturing Plan activities; ● the availability of sufficient pipeline and other transportation facilities to carry Partnership production and the impact of these facilities on price; ● the effect of existing and future laws, governmental regulations and the political and economic climate of the United States of America, or U.S.; ● changes in environmental laws and the regulations and enforcement related to those laws; ● the identification of and severity of environmental events and governmental responses to the events; ● the effect of natural gas and oil derivatives activities; ● the availability of funding for the consideration payable by PDC and its wholly-owned subsidiary to consummate the prospective mergers under the Acquisition Plan; ● the timing and closing, if consummated, of the proposed merger of the 2004 partnerships with and into a wholly-owned subsidiary of PDC; ● conditions in the capital markets; and ● losses possible from pending or future litigation.

· Further, ~~changes~~the Partnership urges the reader to carefully review and consider the cautionary statements made in ~~estimates~~this report, the Partnership’s annual reports on Form 10-K and Form 10-K/A for the year ended December 31, 2009 filed with the Securities and Exchange Commission, or SEC, on March 31, 2010 and August 27, 2010 (“2009 Form 10-K” or “2009 Form 10-K/A”, respectively) and the Partnership’s other filings with the SEC and public disclosures. The Partnership cautions you not to place undue reliance on forward-looking statements, which speak only as of ~~proved~~the ~~reserves;~~date made. Other than as required under the securities laws, the Partnership undertakes no obligation to update any forward-looking statements in order to reflect any event or circumstance occurring after the date of this report or currently unknown facts or conditions or the occurrence of unanticipated events.

· the timing and extent of the Partnership’s success in further developing and producing the Partnership’s natural gas and oil reserves;

· the Managing General Partner’s ability to acquire drilling rig services, supplies and services at reasonable prices;

· risks incident to the recompletion and operation of natural gas and oil wells;

· future production and well recompletion costs;

· the availability of Partnership future cash flows for investor distributions or funding of Well Recompletion Plan activities;

· the availability of sufficient pipeline and other transportation facilities to carry Partnership production and the impact of these facilities on price;

· the effect of existing and future laws, governmental regulations and the political and economic climate of the United States of America, or U.S.;

· changes in environmental laws and the regulations and enforcement related to those laws;

· the identification of and severity of environmental events and governmental responses to the events;

· the effect of natural gas and oil derivatives activities;

· conditions in the capital markets; and

· losses possible from pending or future litigation.

Further, the Partnership urges the reader to carefully review and consider the cautionary statements made in this report, the Partnership’s annual report on Form 10-K for the year ended December 31, 2009 filed with the Securities and Exchange Commission, or SEC, on March 31, 2010, (“2009 Form 10-K”), and the Partnership’s other filings with the SEC and public disclosures. The Partnership cautions you not to place undue reliance on forward-looking statements, which speak only as of the date of this report. Other than as required under the securities laws, the Partnership undertakes no obligation to update any forward-looking statements in order to reflect any event or circumstance occurring after the date of this report or currently unknown facts or conditions or the occurrence of unanticipated events.

- 1 -

~~Index~~INDEX

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements (unaudited)

PDC 2005-A Limited Partnership

Condensed Balance Sheets

(unaudited)

	June 30,			December 31,
	September 30, 2010			December 31, 2009*
	2010				2009*
Assets
Current assets:
Cash and cash equivalents	$	~~224~~321,~~751~~441		$	224,751
Accounts receivable		~~317~~242,~~051~~270			408,544
Oil inventory		2027,~~350~~914			33,305
Due from Managing General Partner-derivatives		~~625~~974,~~669~~873			554,898
Due from Managing General Partner-other, net		~~161~~15,~~857~~191			355,801
Total current assets		1,~~349~~581,~~678~~689			1,577,299
Oil and gas properties, successful efforts method, at cost		44,~~432~~445,~~476~~794			44,419,132
Less: Accumulated depreciation, depletion and amortization		(22,~~240~~847,~~541~~766	)		(20,809,309	)
Oil and gas properties, net		2221,~~191~~598,~~935~~028			23,609,823
Due from Managing General Partner-derivatives		1,~~219~~619,~~969~~492			516,653
Other assets		3744,~~804~~384			24,607
Total noncurrent assets		23,~~449~~261,~~708~~904			24,151,083
Total Assets	$	24,~~799~~843,~~386~~593		$	25,728,382
Liabilities and Partners' Equity
Liabilities and Partners’ Equity
Current liabilities:
Accounts payable and accrued expenses	$	3467,~~687~~675		$	41,448
Due to Managing General Partner-derivatives		~~493~~557,~~908~~082			529,551
Total current liabilities		~~528~~624,~~595~~757			570,999
Due to Managing General Partner-derivatives		1,~~275~~182,~~281~~965			1,487,222
Asset retirement obligations		~~526~~533,~~366~~302			512,800
Total liabilities		2,~~330~~341,~~242~~024			2,571,021
Commitments and contingent liabilities
Partners' equity:
Partners’ equity:
Managing General Partner		4,~~508~~515,~~813~~498			4,646,456
Limited Partners - 1,996.87 units issued and outstanding		17,~~960~~987,~~331~~071			18,510,905
Total Partners' equity		22,469,144			23,157,361
Total Partners’ equity		22,502,569			23,157,361
Total Liabilities and Partners' Equity	$	24,799,386		$	25,728,382
Total Liabilities and Partners’ Equity	$	24,843,593		$	25,728,382

__________________________________

*Derived from audited 2009 balance sheet

See accompanying notes to unaudited condensed financial statements.

- 2 -

~~Index~~INDEX

PDC 2005-A Limited Partnership

Condensed Statements of Operations

(unaudited)

	Three months ended June 30,					Six months ended June 30,
	Three months ended September 30,					Nine months ended September 30,
	2010		2009			2010		2009
Revenues:
Natural gas and oil sales	$	~~926~~835,~~848~~268	$	~~631~~772,~~896~~050		$	23,~~213~~048,~~524~~792	$	12,~~495~~267,~~588~~638
Commodity price risk management gain (loss), net		~~331~~862,~~609~~070		(~~780~~593,~~538~~108	)		12,~~553~~415,~~061~~131		(~~820~~1,~~782~~413,890	)
Total revenues		1,~~258~~697,~~457~~338		~~(148~~178,~~642~~942	)		35,~~766~~463,~~585~~923		~~674~~853,~~806~~748
Operating costs and expenses:
Natural gas and oil production costs		~~334~~424,~~922~~650		~~409~~459,~~071~~163			~~601~~1,~~513~~026,163		~~727~~1,~~235~~186,398
Direct costs - general and administrative		4335,~~585~~197		~~116~~79,~~902~~882			78114,~~811~~008		~~268~~348,~~869~~751
Depreciation, depletion and amortization		~~712~~607,~~258~~225		~~858~~916,~~715~~146			12,~~431~~038,~~232~~457		12,~~940~~857,~~860~~006
Accretion of asset retirement obligations		6,~~833~~936		4,624			1320,~~566~~502		913,~~248~~872
Total operating costs and expenses		1,~~097~~074,~~598~~008		1,~~389~~459,~~312~~815			23,~~125~~199,~~122~~130		24,~~946~~406,~~212~~027
Income (loss) from operations		~~160~~623,~~859~~330		(1,~~537~~280,~~954~~873	)		12,~~641~~264,~~463~~793		(23,~~271~~552,~~406~~279	)
Interest income		-		10,267			-		21,967
Interest expense		—		(2,338	)		—		(2,338	)
Net income (loss)	$	160,859	$	(1,527,687	)	$	1,641,463	$	(2,249,439	)
Interest income		—		11,848			—		33,815
Net income (loss) allocated to partners	$	160,859	$	(1,527,687	)	$	1,641,463	$	(2,249,439	)
Net income (loss)	$	623,330	$	(1,271,363	)	$	2,264,793	$	(3,520,802	)
Less: Managing General Partner interest in net income (loss)		32,172		(305,538	)		328,293		(449,888	)
Net income (loss) allocated to partners	$	623,330	$	(1,271,363	)	$	2,264,793	$	(3,520,802	)
Net income (loss) allocated to Investor Partners	$	128,687	$	(1,222,149	)	$	1,313,170	$	(1,799,551	)
Less: Managing General Partner interest in net income (loss)		124,666		(254,272	)		452,959		(704,160	)
Net income (loss) per Investor Partner unit	$	64	$	(612	)	$	658	$	(901	)
Net income (loss) allocated to Investor Partners	$	498,664	$	(1,017,091	)	$	1,811,834	$	(2,816,642	)
Net income (loss) per Investor Partner unit	$	250	$	(509	)	$	907	$	(1,411	)
Investor Partner units outstanding		1,996.87		1,996.87			1,996.87		1,996.87

See accompanying notes to unaudited condensed financial statements.

- 3 -

~~Index~~INDEX

PDC 2005-A Limited Partnership

Condensed Statements of Cash Flows

(unaudited)

	Six months ended June 30,
	Nine months ended September 30,
	2010			2009
Cash flows from operating activities:
Net income (loss)	$	12,~~641~~264,~~463~~793		$	(23,~~249~~520,~~439~~802	)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization		12,~~431~~038,~~232~~457			12,~~940~~857,~~860~~006
Accretion of asset retirement obligations		1320,~~566~~502			913,~~248~~872
Unrealized (gain) loss on derivative transactions		(1,~~021~~799,~~671~~540	)		23,~~300~~400,~~112~~498
Changes in operating assets and liabilities:
Decrease in accounts receivable		91166,~~493~~274			7595,~~031~~311
Decrease in oil inventory		12,955			5,852
Decrease (increase) in oil inventory		5,391			(7,178	)
Increase in other assets		(1319,~~197~~777	)		(1318,~~834~~133	)
Decrease in accounts payable and accrued expenses		(6,761	)		(31,533	)
Increase (decrease) in accounts payable and accrued expenses		26,227			(36,522	)
Decrease in due from Managing General Partner - other, net		~~193~~340,~~944~~610			~~589~~1,~~846~~447,392
Net cash provided by operating activities		23,~~343~~042,~~024~~937			24,~~626~~231,~~143~~444
Cash flows from investing activities:
Capital expenditures for oil and gas properties		(1326,~~344~~662	)		(1826,~~098~~381	)
Proceeds from drilling advance refund from Managing General Partner		-—			108,531
Net cash (used in) provided by investing activities		(1326,~~344~~662	)		9082,~~433~~150
Cash flows from financing activities:
Distributions to Partners		(2,~~329~~919,~~680~~585	)		(24,~~606~~403,~~502~~453	)
Net cash used in financing activities		(2,~~329~~919,~~680~~585	)		(24,~~606~~403,~~502~~453	)
Net increase in cash and cash equivalents		-96,690			~~110~~(89,~~074~~859	)
Cash and cash equivalents, beginning of period		224,751			314,610
Cash and cash equivalents, end of period	$	~~224~~321,~~751~~441		$	~~424~~224,~~684~~751

See accompanying notes to unaudited condensed financial statements.

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~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

~~June~~September 30, 2010

(unaudited)

Note 1−General and Basis of Presentation

The PDC 2005-A Limited Partnership (the "Partnership") was organized as a limited partnership on November 30, 2004, in accordance with the laws of the State of West Virginia for the purpose of engaging in the exploration and development of oil and natural gas properties. Upon completion of the sale of Partnership units on February 9, 2005, the Partnership was funded and commenced its business operations. The Partnership owns natural gas and oil wells located in Colorado and from the wells, the Partnership produces and sells natural gas and oil.

Purchasers of partnership units subscribed to and fully paid for 124.79 units of limited partner interests and 1,872.08 units of additional general partner interests at $20,000 per unit. In accordance with the terms of the Limited Partnership Agreement (the “Agreement”), Petroleum Development Corporation, a Nevada Corporation that now conducts business under the name “PDC Energy”, is the Managing General Partner of the Partnership (hereafter, the “Managing General Partner” or “PDC”) and has a 20% Managing General Partner ownership in the Partnership. Upon completion of the drilling phase of the Partnership's wells, all additional general partners units were converted into units of limited partner interests and thereafter became limited partners of the Partnership. Throughout the term of the Partnership, revenues, costs, and cash distributions are allocated 80% to the limited and additional general partners (collectively, the “Investor Partners”), which are shared pro rata based upon the portion of units owned in the Partnership, and 20% to the Managing General Partner.

As of ~~June~~September 30, 2010, there were 1,502 Investor Partners. As of ~~June~~September 30, 2010, the Managing General Partner has repurchased 2428.021 units of the total 1,996.87 outstanding units of Partnership interests from Investor Partners at an average price of $9,~~891~~147 per unit and, as a result, participates in the sharing of revenues, costs and cash distributions as both an investor partner and as the Managing General Partner.

The Managing General Partner, under the terms of the Drilling and Operating Agreement (the “D&O Agreement”), has full authority to conduct the Partnership’s business and actively manage the Partnership. The Partnership expects continuing operations of its natural gas and oil properties until such time that the Partnership’s wells are depleted or become uneconomical to produce, at which time that well may be sold or plugged, reclaimed and abandoned. The Partnership’s maximum term of existence extends through December 31, 2055, unless dissolved by certain conditions stipulated within the Agreement (which are unlikely to occur at this time,) or by written consent of the Investor Partners owning a majority of outstanding units at that time.

In the Managing General Partner’s opinion, the accompanying interim unaudited condensed financial statements contain all adjustments (consisting of only normal recurring adjustments) necessary for a fair statement of the Partnership’s financial statements for interim periods in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission, or SEC. Accordingly, pursuant to such rules and regulations, certain notes and other financial information included in audited financial statements have been condensed or omitted. The information presented in this quarterly report on Form 10-Q should be read in conjunction with the Partnership’s audited financial statements and notes thereto included in the Partnership’s 2009 Form 10-K. The Partnership’s accounting policies are described in the Notes to Financial Statements in the Partnership’s 2009 Form 10-K and updated, as necessary, in this Form 10-Q. The results of operations for the three and ~~six~~nine months ended ~~June~~September 30, 2010, and the cash flows for the ~~six~~nine months ended ~~June~~September 30, 2010, are not necessarily indicative of the results to be expected for the full year or any other future period.

Note 2−Recent Accounting Standards

Recently ~~Issued~~Adopted Accounting Standards

Fair Value Measurements and Disclosures

In January 2010, the Financial Accounting Standards Board (“FASB”) issued changes clarifying existing disclosure requirements related to fair value measurements. The ~~requiring~~update ~~gross~~also ~~presentation~~added ofa ~~activities~~new ~~within~~requirement ~~the~~to ~~Level~~disclose 3fair ~~roll~~value ~~forward,~~transfers ~~whereby~~in ~~entities~~and ~~must~~out ~~present~~of ~~separately~~Levels ~~information~~1 ~~about~~and ~~purchases,~~2 ~~sales, issuances~~ and ~~settlements. This~~describe ~~change~~the ~~will~~reasons ~~be effective~~ for the ~~Partnership’s~~transfers. The ~~financial~~adoption ~~statements~~of ~~issued~~these ~~for~~changes ~~annual~~as ~~reporting~~of ~~periods~~January ~~beginning after December 15~~1, 2010~~. The~~, ~~Partnership~~did ~~does~~ not ~~expect adoption of these changes to~~ have a material ~~effect~~impact on the Partnership’s ~~financial~~accompanying ~~statements~~unaudited ~~and~~condensed ~~related~~financial ~~disclosures~~statements.

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~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

~~June~~September 30, 2010

(unaudited)

Recently Issued Accounting Standards

Fair Value Measurements and Disclosures

In January 2010, the FASB issued changes related to fair value measurements requiring gross presentation of activities within the Level 3 roll forward, whereby entities must present separately information about purchases, sales, issuances and settlements. This change will be effective for the Partnership’s financial statements issued for annual reporting periods beginning after December 15, 2010. The Partnership does not expect adoption of these changes to have a material effect on the Partnership’s financial statements and related disclosures.

Internal Control over Financial Reporting in Exchange Act Periodic Reports

OnBy ~~July~~Final Rule effective September 21, 2010, the ~~enactment~~SEC amended its rules and forms to conform them to Section 404(c) of the Sarbanes-Oxley Act of 2002, or SOX, as added by the Dodd-Frank Wall Street Reform and Consumer Protection Act. The ~~made~~new ~~permanent the~~ SEC’s ~~non-accelerated~~rules ~~filer’s~~exempt ~~exemption~~the Partnership, ~~previously~~as ~~set~~a tosmaller ~~expire~~reporting ~~after~~company ~~December 15~~filer, ~~2010,~~ from ~~compliance~~the ~~with~~SOX ~~Section~~requirement ~~404(b)~~that ofregistrants ~~the~~which ~~Sarbanes-Oxley~~are ~~Act~~accelerated ofor ~~2002,~~large oraccelerated ~~SOX. Therefore~~filers, asobtain aand ~~non-accelerated~~include ~~filer,~~in ~~the~~their ~~Partnership~~annual isreport ~~permanently~~filed ~~exempted~~with ~~from~~ the ~~SOX~~SEC, ~~requirement~~their ~~that~~independent ~~SEC~~registered ~~registrants~~public ~~provide~~accounting anfirm’s attestation report on the effectiveness of the registrant’s internal controls over financial reporting ~~by the registrant’s external auditor~~.

Note 3−Transactions with Managing General Partner and Affiliates

The Managing General Partner transacts business on behalf of the Partnership under the authority of the D&O Agreement. Revenues and other cash inflows received on behalf of the Partnership are distributed to the Partners net of (after deducting) corresponding operating costs and other cash outflows incurred on behalf of the Partnership. The fair value of the Partnership’s portion of unexpired derivative instruments is recorded on the balance sheet under the captions “Due from Managing General Partner–derivatives,” in the case of net unrealized gains or “Due to Managing General Partner–derivatives,” in the case of net unrealized losses.

The following table presents transactions with the Managing General Partner reflected in the balance sheet line item – Due from (to) Managing General Partner-other, net which remain undistributed or unsettled with the Partnership’s investors as of the dates indicated.

	June 30,			December 31,
	September 30,			December 31,
	2010			2009
Natural gas and oil sales revenues collected from the Partnership's third-party customers	$	~~298~~331,~~199~~228		$	392,255
Commodity Price Risk Management, Realized Gains		4980,~~073~~795			396,498
Other (1)		(~~185~~396,~~415~~832	)		(432,952	)
Total Due from Managing General Partner-other, net	$	~~161~~15,~~857~~191		$	355,801

(1)

All other unsettled transactions, excluding derivative instruments, between the Partnership and the Managing General Partner. The majority of these are operating costs or general and administrative costs which have not been deducted from distributions.

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~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

~~June~~September 30, 2010

(unaudited)

The following table presents Partnership transactions, excluding derivative transactions which are more fully detailed in Note 5, Derivative Financial Instruments, with the Managing General Partner and its affiliates for the three and ~~six~~nine months ended ~~June~~September 30, 2010 and 2009. “Well operations and maintenance” and “Gathering, compression and processing fees” are included in “Natural gas and oil production costs” on the statements of operations.

Three months ended June 30,

Six months ended June 30,

Three months ended September 30,

Nine months ended September 30,

2010

2009

2010

2009

Well operations and maintenance

~~233~~323,~~661~~909

~~333~~363,~~886~~182

~~409~~733,~~123~~032

~~546~~910,~~921~~103

Gathering, compression and processing fees

4746,~~186~~374

4750,~~749~~424

92138,~~430~~804

94144,~~483~~907

Direct costs - general and administrative

4335,~~585~~197

~~116~~79,~~902~~882

78114,~~811~~008

~~268~~348,~~869~~751

Cash distributions*

~~220~~124,~~425~~411

~~346~~368,~~958~~132

~~488~~612,~~134~~545

~~542~~910,~~001~~133

*Cash distributions include $106,~~040~~430 and $2228,~~198~~628 during the three and ~~six~~nine months ended ~~June~~September 30, 2010, respectively, and $158,~~213~~742 and $2029,~~702~~444 during the three and ~~six~~nine months ended ~~June~~September 30, 2009, respectively, related to equity cash distributions on Investor Partner units repurchased by PDC.

Note 4−Fair Value Measurements

Derivative Financial Instruments. The Partnership measures fair value based upon quoted market prices, where available. The valuation determination includes: (1) identification of the inputs to the fair value methodology through the review of counterparty statements and other supporting documentation, (2) determination of the validity of the source of the inputs, (3) corroboration of the original source of inputs through access to multiple quotes, if available, or other information and (4) monitoring changes in valuation methods and assumptions. The methods described above may produce a fair value calculation that may not be indicative of future fair values. The valuation determination also gives consideration to nonperformance risk on Partnership liabilities in addition to nonperformance risk on PDC’s own business interests and liabilities, as well as the credit standing of derivative instrument counterparties. The Managing General Partner primarily uses financial institutions, ~~who~~which are also major lenders in PDC’s credit facility agreement, as counterparties to the Partnership’s derivative contracts. The Managing General Partner has evaluated the credit risk of the counterparties holding the Partnership’s derivative assets using relevant credit market default rates, giving consideration to amounts outstanding for each counterparty and the duration of each outstanding derivative position. Based on the Managing General Partner’s evaluation, as of ~~June~~September 30, 2010, the impact of ~~nonperformance~~non-performance risk on the fair value of the Partnership’s derivative assets and liabilities was not significant. Validation of the Partnership’s contracts’ fair values are performed internally and while the Managing General Partner uses common industry practices to develop valuation techniques, changes in the Managing General Partner’s pricing methodologies or the underlying assumptions could result in significantly different fair values. While the Managing General Partner believes these valuation methods are appropriate and consistent with those used by other market participants, the use of different methodologies, or assumptions, to determine the fair value of certain financial instruments could result in a different estimate of fair value.

- 7 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

~~June~~September 30, 2010

(unaudited)

The following table presents, by hierarchy level, the Partnership’s derivative financial instruments, including both current and non-current portions measured at fair value.

	Quoted Prices in Active Markets			Significant Unobservable Inputs
	Quoted Prices in Active Markets (Level 1)			Significant Unobservable Inputs (Level 3)			Total
	(Level 1)			(Level 3)			Total
As of December 31, 2009
Assets:
Commodity based derivatives	$	520,527		$	551,024		$	1,071,551
Total assets		520,527			551,024			1,071,551
Liabilities:
Commodity based derivatives		(41,267	)		(90,592	)		(131,859	)
Basis protection derivative contracts		-—			(1,884,914	)		(1,884,914	)
Total liabilities		(41,267	)		(1,975,506	)		(2,016,773	)
Net asset (liability)	$	479,260		$	(1,424,482	)	$	(945,222	)
As of June 30, 2010
As of September 30, 2010
Assets:
Commodity based derivatives	$	12,~~637~~374,~~940~~031		$	~~207~~220,~~698~~334		$	12,~~845~~594,~~638~~365
Total assets		12,~~637~~374,~~940~~031			~~207~~220,~~698~~334			12,~~845~~594,~~638~~365
Liabilities:
Commodity based derivatives		-—			(4979,~~075~~636	)		(4979,~~075~~636	)
Basis protection derivative contracts		-—			(1,~~720~~660,~~114~~411	)		(1,~~720~~660,~~114~~411	)
Total liabilities		-—			(1,~~769~~740,~~189~~047	)		(1,~~769~~740,~~189~~047	)
Net asset (liability)	$	12,~~637~~374,~~940~~031		$	(1,~~561~~519,~~491~~713	)	$	76854,~~449~~318

The following table presents the changes of the Partnership’s Level 3 derivative financial instruments measured on a recurring basis:

	Six months ended
	Nine months ended September 30, 2010
	June 30, 2010
Fair value, net liability, as of December 31, 2009	$	(1,424,482	)
Changes in fair value included in statement of operations line item:
Commodity price risk management, net		~~200~~173,~~266~~036
Settlements		(~~337~~268,~~275~~267	)
Fair value, net liability, as of June 30, 2010	$	(1,561,491	)
Fair value, net liability, as of September 30, 2010	$	(1,519,713	)
Change in unrealized gains (losses) relating to assets (liabilities) still held as of June 30, 2010 included in statement of operations line item:
Change in unrealized gains (losses) relating to assets (liabilities) still held as of September 30, 2010 included in statement of operations line item:
Commodity price risk management, net	$	~~148~~38,~~761~~751

See Note 5, Derivative Financial Instruments, for additional disclosure related to the Partnership’s derivative financial instruments.

Non-Derivative Assets and Liabilities. The carrying values of the financial instruments comprising current assets and current liabilities approximate fair value due to the short-term maturities of these instruments.

- 8 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

~~June~~September 30, 2010

(unaudited)

Note 5−Derivative Financial Instruments

As of ~~June~~September 30, 2010, the Partnership had derivative instruments, comprised of commodity collars, commodity fixed-price swaps and basis protection swaps, in place for a portion of its anticipated production through 2013 for a total of 1,~~482~~351,~~234~~605 MMbtu of natural gas and 129,~~621~~285 Bbls of oil. Partnership policy prohibits the use of natural gas and oil derivative instruments for speculative purposes.

The following table summarizes the line item and fair value amounts of the Partnership’s derivative instruments in the accompanying balance sheets.

			Fair Value
		Balance Sheet	June 30,			December 31,
Derivative instruments not designated as hedge (1):		Balance Sheet Line Item	September 30, 2010			December 31, 2009
Derivative instruments not designated as hedge (1):		Line Item	2010			2009
Derivative Assets:	Current
	Commodity contracts	Due from Managing General Partner-derivatives	$	~~625~~974,~~669~~873		$	554,898
	Non Current
	Commodity contracts	Due from Managing General Partner-derivatives		1,~~219~~619,~~969~~492			516,653
Total Derivative Assets			$	12,~~845~~594,~~638~~365		$	1,071,551
Derivative Liabilities:	Current
	Commodity contracts	Due to Managing General Partner-derivatives	$	~~(22~~57,~~947~~760	)	$	(42,274	)
	Basis protection contracts	Due to Managing General Partner-derivatives		~~(470~~499,~~961~~322	)		(487,277	)
	Non Current
	Commodity contracts	Due to Managing General Partner-derivatives		~~(26~~21,~~128~~877	)		(89,584	)
	Basis protection contracts	Due to Managing General Partner-derivatives		(1,~~249~~161,~~153~~088	)		(1,397,638	)
Total Derivative Liabilities			$	(1,~~769~~740,~~189~~047	)	$	(2,016,773	)

(1) As of ~~June~~September 30, 2010 and December 31, 2009, none of the Partnership’s derivative instruments were designated as hedges.

The following table summarizes the impact of the Partnership’s derivative instruments on the Partnership’s accompanying statements of operations for the three and ~~six~~nine months ended ~~June~~September 30, 2010 and 2009.

	Three months ended June 30,
	Three months ended September 30,
	2010							2009
Statement of operations line item	Reclassification of Realized Gains (Losses) Included in Prior Periods Unrealized			Realized and Unrealized Gains For the Current Period		Total		Reclassification of Realized Gains (Losses) Included in Prior Periods Unrealized			Realized and Unrealized Losses For the Current Period			Total
Commodity price risk management, net
Realized gains (losses)	$	5627,~~676~~270		$	856,~~659~~931	$	6584,~~335~~201	$	~~629~~513,~~815~~607		$	(456,~~082~~329	)	$	~~584~~507,~~733~~278
Unrealized (losses) gains		(5627,~~676~~270	)		~~322~~805,~~950~~139		~~266~~777,~~274~~869		(~~629~~513,~~815~~607	)		(~~735~~586,~~456~~779	)		(1,~~365~~100,~~271~~386	)
Total commodity price risk management gain (loss), net	$	-—		$	~~331~~862,~~609~~070	$	~~331~~862,~~609~~070	$	-—		$	(~~780~~593,~~538~~108	)	$	(~~780~~593,~~538~~108	)

	Six months ended June 30,
	Nine months ended September 30,
	2010							2009
Statement of operations line item	Reclassification of Realized Gains (Losses) Included in Prior Periods Unrealized			Realized and Unrealized Gains For the Current Period		Total		Reclassification of Realized Gains (Losses) Included in Prior Periods Unrealized			Realized and Unrealized Gains (Losses) For the Current Period			Total
Commodity price risk management, net
Realized gains	$	~~285~~108,~~576~~282		$	~~245~~507,~~814~~309	$	~~531~~615,~~390~~591	$	1,~~182~~557,~~442~~047		$	~~296~~429,~~888~~561		$	1,~~479~~986,~~330~~608
Unrealized (losses) gains		(~~285~~108,~~576~~282	)		1,~~307~~907,~~247~~822		1,~~021~~799,~~671~~540		(1,~~182~~557,~~442~~047	)		(1,~~117~~843,~~670~~451	)		(23,~~300~~400,~~112~~498	)
Total commodity price risk management gain (loss), net	$	-—		$	12,~~553~~415,~~061~~131	$	12,~~553~~415,~~061~~131	$	-—		$	(~~820~~1,~~782~~413,890	)	$	(~~820~~1,~~782~~413,890	)

- 9 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

~~June~~September 30, 2010

(unaudited)

Concentration of Credit Risk. A significant component of the Partnership’s future liquidity is concentrated in derivative instruments that enables the Partnership to manage a portion of its exposure to price volatility from producing natural gas and oil. These arrangements expose the Partnership to the risk of nonperformance by the counterparties. The Managing General Partner primarily uses financial institutions, who are also major lenders in the Managing General Partner’s credit facility agreement, as counterparties to the derivative contracts. To date, the Partnership has experienced no counterparty defaults.

Note 6−Commitments and Contingencies

Environmental

Due to the nature of the natural gas and oil business, the Partnership is exposed to environmental risks. The Managing General Partner has various policies and procedures to avoid environmental contamination and mitigate the risks from environmental contamination. The Managing General Partner conducts periodic reviews to identify changes in the Partnership’s environmental risk profile. Liabilities are accrued when environmental assessments and/or clean-ups are probable and the costs can be reasonably estimated. ~~The~~As ~~Managing~~of ~~General~~September ~~Partner~~30, ~~has~~2010, ~~evaluated~~the ~~this~~Partnership had accrued an environmental remediation liability, ~~for~~included in the Balance Sheet line item captioned “Accounts payable and accrued expenses.” This accrual represents costs ~~which~~estimated ~~might~~to ~~exceed~~be ~~the~~incurred in addition to normal recurring environmental-related expenditures ~~that~~which have been incurred and recorded at ~~June~~September 30, 2010. During the third quarter of 2010, ~~and~~the ~~determined~~Managing itGeneral toPartner beidentified ~~immaterial~~existing ground contamination at one Partnership well site. The Partnership recorded an accrual of approximately $35,000, which is the estimated cost attributable to the Partnership, asbased ofprincipally ~~June~~on estimated third party costs, to remediate the ground contamination less actual costs incurred through September 30, 2010, if any. The Managing General Partner is not aware of any environmental claims existing as of ~~June~~September 30, 2010, which have not been provided for or would otherwise have a material impact on the Partnership’s financial statements. However, there can be no assurance that current regulatory requirements will not change or unknown past non-compliance with environmental laws will not be discovered on the Partnership’s properties.

On In December 8, 2008, the Managing General Partner received a Notice of Violation/Cease and Desist Order (the “Notice”) from the Colorado Department of Public Health and Environment (the “CDPHE”), related to the stormwater permit for the Garden Gulch Road. The Managing General Partner manages this private road for Garden Gulch LLC. The Managing General Partner is one of eight users of this road, all of which are ~~oil~~natural gas and ~~gas~~oil companies operating in the Piceance ~~Basin~~region of Colorado. Operating expenses, including ~~amounts arising from~~ this ~~notice~~fine, if any, are allocated among the users of the road based upon their respective usage. The Partnership has 13 wells in this region. The Notice ~~alleges~~alleged a deficient and/or incomplete stormwater management plan, failure to implement best management practices and failure to conduct required permit inspections. The Notice requires corrective action and states that the recipient shall cease and desist such alleged violations. The Notice states that a violation could result in civil penalties up to $10,000 per day. The Managing General Partner’s responses were submitted on February 6, 2009, and April 8, 2009. Commencing in December 2009, the Managing General Partner entered into negotiations with the CDPHE regarding this notice and continues to work to bring this matter to closure. Given the inherent uncertainty in administrative actions of this nature, the Managing General Partner is unable to predict with certainty the ultimate outcome of this administrative action; athowever, ~~this~~the ~~time~~Managing ~~and~~General ~~therefore~~Partner nodoes ~~amounts~~not believe that the ultimate outcome will have ~~been~~a ~~recorded~~material adverse effect on the Partnership’s financial ~~records~~position or results of operations.

~~Derivative~~ Note ~~Contracts~~7– Subsequent Events

~~The~~On ~~Partnership~~October is20, ~~exposed~~2010, to the ~~effect~~Managing ofGeneral ~~market~~Partner ~~fluctuations~~notified inInvestor Partners by letter, that the ~~prices~~Partnership commenced the withholding of ~~natural~~funds, ~~gas~~on ~~and~~a ~~oil. The~~pro-rata basis allocated to the Managing General Partner ~~employs~~and ~~established~~Investor ~~policies~~Partners ~~and~~based ~~procedures~~on their proportional ownership interest, which will be utilized to ~~manage~~further develop the ~~risks~~Partnership’s ~~associated~~Denver-Julesburg ~~with~~(“DJ”) ~~these~~Basin ~~market~~Wattenberg ~~fluctuations~~Field bywells ~~utilizing~~under ~~derivative~~the ~~instruments~~previously announced Well Refracturing Plan. ~~Should~~The ~~the~~plan ~~counterparties~~provides tofor the ~~Managing~~refracturing ~~General~~of ~~Partner~~the Partnership’s ~~derivative~~Wattenberg ~~instruments~~Field ~~not~~wells ~~perform,~~in the ~~Partnership’s~~currently ~~exposure~~producing toCodell ~~market~~formation ~~fluctuations~~and inthese ~~commodity~~activities ~~prices~~are ~~would~~expected ~~increase~~to ~~significantly~~begin mid-to-late 2011. ~~The~~Funds withheld from the Partnership’s investors, including the Managing General Partner, ~~and~~in the ~~Partnership~~October 2010 distribution amounted to $20,000 and have ~~had~~been nodeposited ~~counterparty~~in ~~defaults~~the Partnership’s bank account.

- 10 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Item 2.

Management’s Discussion and Analysis of Financial Condition and Results of Operations

PDC Sponsored Drilling Program Acquisition Plan

PDC, the managing general partner of various public limited partnerships, has disclosed its intention to pursue the acquisition, within the next three years, of the remaining third-party Investor Partner interests in the limited partnerships which PDC has sponsored, including PDC 2005-A Limited Partnership. (For additional information regarding PDC’s intention to pursue acquisition of PDC sponsored Partnership, refer to Regulation FD disclosure included in Items 2.02 and/or 7.01 of PDC’s Form 8-Ks dated March 4, 2010, June 9, 2010 and July 15, 2010, which information shall not, by reason of this reference, be deemed to be incorporated by reference in, or otherwise be deemed to be part of, this report.) Under the Acquisition Plan, any offer will be subject to the terms and conditions of a to be proposed merger agreement wherein the Partnership will merge into PDC. The transaction will also be subject to PDC having sufficient available capital and the approval by a majority of the Investor Partners’ interests, excluding partnership interest owned by PDC, of each respective limited partnership. Should a purchase offer from PDC be proposed, approved by a majority of the Partnerships’ unaffiliated limited partners, and consummated, the purchase transaction would result in a liquidating cash distribution to all partners and termination of the existence of the Partnership. There is no assurance that any such acquisition will occur.

Partnership Overview

PDC 2005-A Limited Partnership engages in the development, production and sale of oil and natural gas. The Partnership began oil and gas operations in February 2005 and operates 49 gross (44.4 net) productive wells located in the Rocky Mountain Region in the state of Colorado. The Managing General Partner markets the Partnership’s natural gas production to commercial end users, interstate or intrastate pipelines or local utilities, primarily under market sensitive contracts in which the price of natural gas sold varies as a result of market forces. PDC does not charge an additional fee for the marketing of the natural gas and oil because these services are covered by the monthly well operating charge. PDC, on behalf of the Partnership in accordance with the D&O Agreement, is authorized to enter into multi-year fixed price contracts or utilize derivatives, including collars, swaps or basis protection swaps, in order to offset some or all of the commodity price variability for particular periods of time. Seasonal factors, such as effects of weather on prices received and costs incurred, and availability of pipeline capacity, owned by PDC or other third parties, may impact the Partnership's results. In addition, both sales volumes and prices tend to be affected by demand factors with a seasonal component.

~~Well~~PDC ~~Recompletion~~Sponsored Drilling Program Acquisition Plan

~~The~~PDC, ~~Managing~~the ~~General~~managing ~~Partner~~general partner of various public limited partnerships, has ~~developed~~disclosed aits ~~plan~~intention to ~~initiate~~pursue ~~recompletion~~the ~~activities~~acquisitions, ~~during~~within ~~2011. This~~the ~~plan~~next ~~includes~~three ~~notifying~~years ~~investor~~beginning ~~partners~~in ~~that~~the infall ~~October~~of 2010, ~~funds~~of tothe ~~begin~~remaining ~~these~~third-party ~~recompletions~~Investor ~~may~~Partner beinterests ~~withheld~~in ~~from~~the ~~future~~limited ~~distributable~~partnerships ~~cash~~which ~~flows~~PDC ofhas sponsored (the ~~Partnership~~“Acquisition ~~resulting~~Plan”), ~~from~~including ~~both~~this ~~current~~Partnership. (For ~~production~~additional ~~and~~information ~~any~~regarding ~~increased~~PDC’s ~~production~~intention ~~due~~ to ~~recompletion~~pursue ~~activities. The~~acquisitions ~~funds~~of ~~retained~~PDC ~~that~~sponsored ~~are~~partnerships, ~~necessary~~refer ~~for~~to the ~~Partnership~~disclosure toincluded ~~pay~~in ~~for~~Items ~~recompletion~~2.02 ~~costs~~and/or ~~will~~7.01 ~~materially~~of ~~reduce,~~PDC’s upForms to8-K ~~100%,~~dated ~~distributable~~March ~~cash~~4, ~~flows~~2010, ~~for~~June a9, ~~period~~2010 ofand ~~time~~July ~~not~~15, to2010, ~~exceed~~which ~~five~~information ~~years. If~~shall ~~any~~not, orby ~~all~~reason of ~~the~~this ~~Partnership’s~~reference, ~~Wattenberg~~be ~~wells~~deemed ~~are~~to ~~not~~be ~~recompleted,~~incorporated ~~the~~by ~~Partnership~~reference ~~will~~in, ~~experience~~or aotherwise ~~reduction~~be indeemed ~~proved~~to ~~reserves~~be ~~currently~~part ~~assigned~~of, tothis ~~these wells~~report). ~~Both~~Under the ~~number~~Acquisition ofPlan, ~~recompletions~~any ~~and~~existing ~~the~~or ~~timing~~future ofmerger ~~recompletions~~offer will be ~~based~~subject onto the ~~availability~~terms and conditions of ~~cash~~the ~~withheld~~related ~~from~~merger ~~Partnership~~agreement ~~distributions. The~~and ~~Managing~~such ~~General~~agreement ~~Partner~~does ~~believes~~or ~~that,~~will ~~based~~likely oncontemplate ~~projected~~the ~~recompletion~~partnership ~~costs~~being ~~and~~merged ~~projected~~with ~~cash~~and ~~withholding,~~into ~~all~~a ~~partnership~~wholly ~~recompletions~~owned ~~will~~subsidiary beof ~~completed~~PDC. The ~~within~~transaction awill ~~five~~also ~~year~~be ~~period. Current~~subject ~~estimated~~to, ~~costs~~among ~~for~~other ~~these~~things, ~~well~~PDC ~~recompletions~~having ~~are~~sufficient ~~between~~available ~~$150,000~~capital and ~~$200,000~~the ~~per~~approval ~~recompletion. This~~by ~~Partnership~~a ~~potentially~~majority ~~has~~of 33the ~~well~~limited ~~recompletion~~partnerships ~~opportunities. Total~~units ~~withholding~~held ~~for~~by ~~these~~the ~~activities~~Investor ~~from~~Partners, ~~the~~excluding ~~Partnership’s~~limited ~~distributable~~partnership ~~cash~~units ~~flows~~owned isby ~~estimated~~PDC toor ~~total~~its ~~between~~affiliates, ~~$5.0~~of ~~million~~each ~~and~~respective ~~$6.6~~limited ~~million~~partnership. ~~The~~ ~~Managing~~Consummation ~~General~~of ~~Partner~~any ~~will~~proposed ~~re-evaluate~~merger under the ~~feasibility~~Acquisition ofPlan ~~commencing~~will ~~any~~likely orresult ~~all~~in ofthe ~~these~~termination ~~recompletion~~of ~~opportunities~~the ~~based~~existence onof ~~engineering~~that ~~data~~partnership and athe ~~favorable~~right ~~commodity~~for ~~price~~third-party ~~environment~~Investor inPartners ~~order~~ to ~~maximize~~receive ~~the~~a ~~financial~~cash ~~benefit~~payment offor ~~the~~their ~~recompletion~~limited partnership units in that partnership.

~~Implementation~~ In June 2010, PDC and a wholly owned subsidiary of ~~the~~PDC ~~Well~~entered ~~Recompletion~~into ~~Plan~~a ~~would~~merger ~~reduce~~agreement orwith ~~eliminate~~PDC ~~Partnership~~2004-A ~~distributions~~Limited toPartnership, ~~investors~~PDC ~~while~~2004-B ~~the~~Limited ~~work~~Partnership, isPDC ~~being~~2004-C ~~conducted~~Limited Partnership and ~~paid~~PDC ~~for~~2004-D Limited Partnership (collectively, the “2004 partnerships”). ~~Depending~~PDC ~~upon~~serves as the ~~level~~managing general partner of ~~withholding~~each ~~and~~of the ~~results~~2004 ofpartnerships. Pursuant ~~operations~~to each merger agreement, itif the merger is ~~possible~~approved by the holders of a majority of the limited partnership units held by Investor Partners of that ~~investors~~partnership ~~could~~not ~~have~~owned ~~taxable~~by ~~income~~PDC ~~from~~or its affiliates, as well as the ~~Partnership~~satisfaction ~~without~~of ~~any~~other ~~corresponding~~customary ~~distributions~~closing inconditions, then the ~~future~~partnership will merge with and into a wholly owned subsidiary of PDC. ~~Investor~~If ~~Partners~~all four 2004 partnerships are ~~urged~~acquired, PDC will pay up to ~~consult~~an aaggregate ~~tax~~of ~~advisor~~approximately to$36.4 ~~determine~~million ~~all~~for the limited partnership units of these partnerships. Definitive proxy statements for each of the ~~relevant~~2004 ~~federal~~partnerships requesting approval from the applicable third-party Investor Partners for, ~~state~~among ~~and~~other ~~local~~things, ~~tax~~the ~~consequences~~merger agreements were mailed to the third-party Investor Partners of the ~~Well~~2004 ~~Recompletion~~partnerships ~~Plan~~in early October 2010. The ~~above~~special ~~discussion~~meetings iswhereby ~~not~~third-party ~~intended~~Investor asPartners aof ~~substitute~~the ~~for~~2004 ~~careful~~partnerships ~~tax~~will ~~planning,~~have an opportunity to vote and approve the applicable merger agreement are currently scheduled for December 8, 2010 for each of the 2004 partnerships. If the required approvals are received from the third-party Investor Partners ~~should~~at ~~depend~~the ~~upon~~special meetings, each of the ~~advice~~mergers for the 2004 partnerships is expected to close shortly thereafter and no later than December 31, 2010. The feasibility and timing of ~~their~~any ~~own~~future ~~tax~~purchase ~~advisors~~offer ~~concerning~~by PDC to any additional partnership, including this Partnership, depends on that partnership’s suitability in meeting a set of criteria that includes, but is not limited to, the ~~effects~~following: age and productive-life stage characteristics of the ~~Well~~partnership’s ~~Recompletion~~well ~~Plan~~inventory; favorability of economics for Wattenberg Field well refracturing; and SEC reporting compliance status and timing associated to gaining all necessary regulatory approvals required for a merger and repurchase offer. There is no assurance that any merger and acquisition will occur as a result of the proposed repurchase offers to PDC’s 2004 partnerships, or any potential proposed repurchase offer to any other of PDC’s various public limited partnerships, including this Partnership, should they occur.

- 11 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Well Refracturing Plan

The Managing General Partner has developed the Well Refracturing Plan for the Partnership’s Wattenberg Field wells that were initially completed in the Codell formation during the Partnership’s initial development. Under the plan, the Partnership will initiate Codell formation refracturing activities during 2011. These refracturing, or “refracing”, activities will consist of a second hydraulic fracturing treatment to the currently producing Codell formation.

Funding of the initial well refracturing activity began with the withholding, on a pro-rata basis, of $20,000 from the Partnership’s October 2010 monthly distributable cash flows which was allocated to the Managing General Partner and Investor Partners based on their proportional ownership interest. This withholding was deposited into the Partnership’s bank account.

After the initial refrac funding is completed in 2011, the Partnership will re-evaluate the Well Refracturing Plan funding requirements and will continue to withhold cash at varying levels on a pro-rata basis, from the Managing General Partner’s and Investor Partner’s distributable cash flows from current production operations. The most recent cost projection for Codell formation well refracturing ranges between $150,000 and $200,000 per refrac. Total withholding from the Partnership’s distributable cash flows for the Partnership’s 33 well refracturing opportunities is estimated to be between $5.0 million and $6.6 million. The number of refracturings and the timing of refracturing will be based on the availability of cash withheld from Partnership distributions. The necessary funds to be retained by the Partnership for the payment of Well Refracturing Plan activities may materially reduce, up to 100%, of the Managing General Partner’s and Investor Partners’ distributable cash flows for a period of time not to exceed five years.

Partnership Operating Results Overview

Natural gas and oil sales increased 4834% or $0.78 million for the first ~~six~~nine months of 2010 compared to the first ~~six~~nine months of 2009, even though production volumes decreased 1012% period-to-period. This increase was driven primarily by the improved commodity price environment and the increase in the Partnership’s oil production as a percentage of total production. The average sales price per Mcfe, excluding the impact of realized derivative gains, was $5.4310 for the current year period compared to $3.32 for the same period a year ago. Realized derivative gains from natural gas and oil sales contributed an additional $1.3002 per Mcfe or $0.56 million to the first ~~six~~nine months of 2010 total revenues. Comparatively, the total per Mcfe price realized, consisting of the average sales price and realized derivative gains, ~~increased~~decreased slightly to $6.7312 for the current year ~~six~~nine months from $6.6023 for the same prior year period.

The increase in ~~total~~ revenues did not have a corresponding impact on costs and expenses as natural gas and oil production costs and general and administrative expense combined decreased by $0.34 million for the current year ~~six~~nine months compared to the same prior year period. The decrease is primarily due to a reduction in billed professional fees and lower lease operating expenses due to the Managing General Partner’s cost cutting initiatives in the 2010 period compared to the 2009 period.

- 12 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Results of Operations

The following table presents selected information regarding the Partnership’s results of operations.

	Three months ended June 30,							Six months ended June 30,
	Three months ended September 30,							Nine months ended September 30,
	2010		2009		Change			2010		2009		Change
Number of producing wells (end of period)		49		4948		-1			49		4948		-1
Production (1)
Natural gas (Mcf)		~~167~~162,~~190~~575		~~181~~197,~~548~~809		-818	%		~~331~~493,~~413~~988		~~371~~569,~~996~~805		-1113	%
Oil (Bbl)		64,~~129~~688		5,~~248~~756		17-19	%		1217,~~694~~382		1318,~~103~~859		-38	%
Natural gas equivalents (Mcfe) (2)		~~203~~190,~~964~~703		~~213~~232,~~036~~345		-418	%		~~407~~598,~~577~~280		~~450~~682,~~614~~959		-1012	%
Natural Gas and Oil Sales
Natural gas	$	~~486~~511,~~727~~811	$	~~346~~459,~~515~~280		4011	%	$	1,~~295~~807,~~522~~333	$	~~929~~1,~~114~~388,394		3930	%
Oil		~~440~~323,~~121~~457		~~285~~312,~~381~~770		543	%		~~918~~1,~~002~~241,459		~~566~~879,~~474~~244		6241	%
Total natural gas and oil sales	$	~~926~~835,~~848~~268	$	~~631~~772,~~896~~050		478	%	$	23,~~213~~048,~~524~~792	$	12,~~495~~267,~~588~~638		4834	%
Realized Gain on Derivatives, net
Natural gas	$	1528,~~939~~317	$	~~466~~421,~~683~~446		-9793	%	$	~~435~~464,~~782~~099	$	1,~~182~~603,~~110~~556		-6371	%
Oil		4955,~~396~~884		~~118~~85,~~050~~832		-5835	%		95151,~~608~~492		~~297~~383,~~220~~052		-6860	%
Total realized gain on derivatives, net	$	6584,~~335~~201	$	~~584~~507,~~733~~278		-8983	%	$	~~531~~615,~~390~~591	$	1,~~479~~986,~~330~~608		-6469	%
Average Selling Price (excluding realized gain on derivatives)
Natural gas (per Mcf)	$	23.9115	$	12.9132		5236	%	$	3.9166	$	2.5044		5650	%
Oil (per Bbl)		7169.8100		54.3834		3227	%		7271.3242		4346.2362		6753	%
Natural gas equivalents (per Mcfe)		4.5438		23.9732		5332	%		5.4310		3.32		6453	%
Average Selling Price (including realized gain on derivatives)
Natural gas (per Mcf)	$	3.0132	$	4.4845		-3325	%	$	54.2260	$	5.6825		-812	%
Oil (per Bbl)		7980.8792		7669.8725		417	%		7980.8514		6566.9293		2120	%
Natural gas equivalents (per Mcfe)		4.8682		5.7151		-1512	%		6.7312		6.6023		-2	%
Average Lifting Cost (per Mcfe) (3)	$	12.6423	$	1.9298		~~-14~~12	%	$	1.4872	$	1.6174		-81	%
Operating costs and expenses
Direct costs - general and administrative	$	4335,~~585~~197	$	~~116~~79,~~902~~882		-6356	%	$	78114,~~811~~008	$	~~268~~348,~~869~~751		-7167	%
Depreciation, depletion and amortization	$	~~712~~607,~~258~~225	$	~~858~~916,~~715~~146		-1734	%	$	12,~~431~~038,~~232~~457	$	12,~~940~~857,~~860~~006		-2629	%
Cash distributions	$	1589,~~051,926~~905	$	1,~~658~~796,~~732~~951		-3767	%	$	2,~~329~~919,~~680~~585	$	24,~~606~~403,~~502~~453		-1134	%

_______________

(1)

Production is determined by multiplying the gross production volume of properties in which the Partnership has an interest by the percentage of the leasehold or other property interest the Partnership owns.

(2)

A ratio of energy content of natural gas and oil (six Mcf of natural gas equals one Bbl of oil) was used to obtain a conversion factor to convert oil production into equivalent Mcf of natural gas.

(3) ~~Production~~Lifting costs represent natural gas and oil operating expenses which include production taxes.

Definitions used throughout Management’s Discussion and Analysis of Financial Condition and Results of Operations:

·● Bbl – One barrel or 42 U.S. gallons liquid volume

·● MBbl – One thousand barrels

·● Mcf – One thousand cubic feet

·● MMcf – One million cubic feet

·● Mcfe – One thousand cubic feet of natural gas equivalents

·● MMcfe – One million cubic feet of natural gas equivalents

·● MMbtu – One million British Thermal Units

- 13 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Natural Gas and Oil Sales

~~Six~~Nine months ended ~~June~~September 30, 2010 as compared to ~~six~~nine months ended ~~June~~September 30, 2009

The $0.78 million, or 4834% increase in ~~total~~ sales for the 2010 ~~six~~nine month period as compared to the prior year period, was primarily a reflection of the significantly higher average sales price per Mcfe of 6453%, which was partially offset by a production volume decrease of 1012%. The average sales price per Mcfe, excluding the impact of realized derivative gains, was $5.4310 for the current year ~~six~~nine month period compared to $3.32 for the same period a year ago.

~~The~~Natural ~~increase~~gas inand ~~natural~~oil ~~gas~~ revenues ofincreased 39by 30% ~~contrasts~~and ~~to the more significant increase in oil revenues of 62~~41%, respectively. The Partnership’s ~~oil~~natural gas revenue increase benefited from rising commodity prices per Mcf of 6750%, ~~that~~which were partially offset by lower Partnership ~~oil~~natural gas production volumes~~, per Bbl~~ of 313%. This compares to the more ~~moderate~~significant ~~natural~~oil ~~gas~~ revenue increase in which the rise in commodity prices of 5653% ~~were~~was partially offset by a ~~steeper~~more moderate decline in ~~natural~~oil ~~gas~~ production volumes, per ~~Mcf~~Bbl of 118% during the current ~~six~~nine month period.

Three months ended ~~June~~September 30, 2010 as compared to three months ended ~~June~~September 30, 2009

The ~~$0.3 million, or 47~~8% increase in ~~total~~ sales for the 2010 ~~second~~third quarter as compared to the prior year ~~second~~third quarter was primarily a reflection of the higher average sales price per Mcfe of 5332%, substantially ~~which was partially~~ offset by the production volume decrease of 418%. Average sales prices per Mcfe, excluding the impact of realized derivative gains, were $4.5438 for the current year quarter compared to $23.9732 for the same quarter a year ago.

The Partnership expects to experience declines in both natural gas and oil production volumes over the wells’ life cycles until such time that the Partnership’s Wattenberg wells may be successfully ~~recompleted~~refraced. Subsequent to a successful ~~recompletion~~refracturing, production will once again be expected to decline.

Natural Gas and Oil Pricing

Financial results depend upon many factors, particularly the price of natural gas and oil and on PDC’s ability to market the Partnership’s production effectively. Natural gas and oil prices are among the most volatile of all commodity prices. This price volatility has a material impact on the Partnership’s financial results. Natural gas and oil prices also vary by region and locality, depending upon the distance to markets, and the supply and demand relationships in that region or locality and availability of sufficient pipeline capacity. This can be especially true in the Rocky Mountain Region. The combination of increased drilling activity and the lack of local markets have resulted in local market oversupply situations from time to time. Like most producers in the region, the Partnership relies on major interstate pipeline companies to construct these pipelines to increase capacity, rendering the timing and availability of these facilities and transportation capacity beyond the Partnership’s control. Oil pricing, unlike natural gas pricing, is driven predominantly by global supply and demand relationships.

The price at which PDC markets the natural gas produced in the Rocky Mountain Region by the Partnership is based on a variety of prices, which primarily includes natural gas sold at Colorado Interstate Gas, or CIG, prices with a portion sold at Mid-Continent, San Juan Basin, Southern California or other nearby regional prices. The CIG Index, and other indices for production delivered to Rocky Mountain pipelines, has historically been less than the price received for natural gas produced in the eastern regions, which is primarily New York Mercantile Exchange, or NYMEX, based, because of the lack of interstate transmission capacity which moved Rocky Mountain natural gas production to Northeastern U.S. industrial and heating markets. This negative differential has narrowed in the last year and is lower than historical variances. This negative differential between NYMEX and CIG averaged $10.1372 and $1.3816 for the three and ~~six~~nine months ended ~~June~~September 30, 2009, respectively, and narrowed to an average of $0.4851 and $0.3288 for the three and ~~six~~nine months ended ~~June~~September 30, 2010, respectively.

- 14 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Commodity Price Risk Management, Net

The Managing General Partner, on behalf of the Partnership in accordance with the D&O Agreement, is authorized to utilize ~~natural~~various ~~gas and oil~~ derivative instruments to manage ~~price~~volatility ~~risk~~in ~~for~~natural ~~PDC~~gas asand ~~well~~oil ~~as sponsored drilling partnerships~~prices. Commodity price risk management, net, includes realized gains and losses and unrealized changes in the fair value of derivative instruments related to the Partnership’s natural gas and oil production. The Managing General Partner sets these instruments for PDC, and the various partnerships managed by PDC. Derivative financial instrument positions taken by the Managing General Partner on the Partnership’s behalf, are specifically designated to the Partnership’s production volumes. See Note 4, Fair Value Measurements and Note 5, Derivative Financial Instruments, to the Partnership’s unaudited condensed financial statements included in this report, for additional details on the Partnership’s derivative financial instruments.

The following table presents the realized and unrealized derivative gains and losses included in commodity price risk management gain (loss), net.

	Three months ended June 30,						Six months ended June 30,
	Three months ended September 30,						Nine months ended September 30,
Commodity price risk management gain (loss), net	2010			2009			2010			2009
	2010			2009			2010			2009
Commodity price risk management gain (loss), net
Realized gains
Oil	$	49,396		$	118,050		$	95,608		$	297,220
Natural Gas	$	28,317		$	421,446		$	464,099		$	1,603,556
Natural Gas		15,939			466,683			435,782			1,182,110
Oil		55,884			85,832			151,492			383,052
Total realized gain, net		6584,~~335~~201			~~584~~507,~~733~~278			~~531~~615,~~390~~591			1,~~479~~986,~~330~~608
Unrealized gains (losses)
Reclassification of realized gains included in prior periods unrealized		(5627,~~676~~270	)		(~~629~~513,~~815~~607	)		(~~285~~108,~~576~~282	)		(1,~~182~~557,~~442~~047	)
Unrealized gain (loss) for the period		~~322~~805,~~950~~139			(~~735~~586,~~456~~779	)		1,~~307~~907,~~247~~822			(1,~~117~~843,~~670~~451	)
Total unrealized gain (loss), net		~~266~~777,~~274~~869			(1,~~365~~100,~~271~~386	)		1,~~021~~799,~~671~~540			(23,~~300~~400,~~112~~498	)
Commodity price risk management gain (loss), net	$	~~331~~862,~~609~~070		$	(~~780~~593,~~538~~108	)	$	12,~~553~~415,~~061~~131		$	(~~820~~1,~~782~~413,890	)

~~Six~~Nine months ended ~~June~~September 30, 2010 as compared to ~~six~~nine months ended ~~June~~September 30, 2009

The realized derivative gains for the 2010 ~~six~~nine month period were $0.56 million. These realized gains were primarily a result of lower natural gas and oil spot prices at settlement compared to the respective strike price, offset in part by realized losses due to the basis differential between NYMEX and CIG being narrower than the strike price of the derivative position. For the ~~six~~2010 nine month period, realized gains related to ~~natural~~the ~~gas~~Partnership's ~~and~~commodity ~~oil~~positions ~~derivatives~~ were $0.69 million and ~~$0.1 million, respectively, and~~ realized losses on the Partnership’s ~~CIG~~ basis position ~~swaps~~ were $0.23 million. Unrealized gains for the ~~six~~2010 ~~months~~nine month period, were $1.39 million due primarily to a downward shift in the natural gas and oil forward curves, offset by unrealized losses due to the basis differential between NYMEX and CIG being narrower than the strike price of the derivative position. Unrealized gains on the Partnership’s commodity ~~natural gas and oil~~ positions for the 2010 nine month period were $1.2.0 million ~~and~~offset by unrealized losses on the Partnership's basis position of $0.1 million~~, respectively~~.

For the 2009 ~~six~~nine month period, the Partnership realized significant derivative gains as a result of lower natural gas and oil prices at settlement compared to the respective derivative strike prices. Unrealized losses for the period were ~~primarily~~ related to oil swaps, as the forward strip price of oil rebounded during the period, and the CIG basis swaps, as the forward basis differential during the period between NYMEX and CIG continued to narrow from the strike price of the derivative position.

Three months ended ~~June~~September 30, 2010 as compared to three months ended ~~June~~September 30, 2009

The realized derivative gains for the 2010 ~~second~~third quarter were approximately $0.1 million. These realized gains are a result of lower natural gas and oil spot prices at settlement compared to the respective strike price, offset in part by realized losses due to the basis differential between NYMEX and CIG being narrower than the strike price of the derivative position. For the quarter, realized gains related to ~~natural~~the ~~gas~~Partnership's ~~and~~commodity ~~oil~~positions ~~derivatives~~ were ~~approximately~~ $0.32 million and realized losses on the Partnership’s ~~CIG~~ basis position ~~swaps~~ were $0.21 million. For the 2010 ~~second~~ quarter, the unrealized gains of $0.8 million were primarily related to the oil positions, as the forward strip price shifted downward during the quarter, and the widening of the NYMEX-CIG basis differential. Unrealized gains on the Partnership’s commodity ~~oil~~ positions ~~and CIG basis swaps~~ for the 2010 ~~second~~third quarter were $0.19 million ~~and~~offset by unrealized losses on the Partnership's basis position of $0.21 million~~, respectively~~.

- 15 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

For the 2009 ~~second~~third quarter, the Partnership realized significant derivative gains as a result of lower natural gas and oil prices at settlement compared to the respective derivative strike prices. Unrealized losses for the period were primarily related to oil swaps, as the forward strip price of oil rebounded during the period, and the CIG basis swaps, as the forward basis differential during the period between NYMEX and CIG continued to narrow from the strike price of the derivative position.

Natural Gas and Oil Sales Derivative Instruments. The Managing General Partner, on behalf of the Partnership in accordance with the D&O Agreement, is authorized to utilize various derivative instruments to manage volatility in natural gas and oil prices. The Partnership has in place a series of collars, fixed-price swaps and a basis ~~swaps~~swap on a portion of the Partnership’s natural gas and oil production. See Note 5, Derivative Financial Instruments to the Partnership’s financial statements included in the 2009 Form 10-K for an additional discussion on how each derivative type impacts the Partnership’s cash flows.

The following table presents the Partnership’s derivative positions in effect as of ~~June~~September 30, 2010.

	Collars	~~Collars~~								Fixed-Price Swaps	~~Fixed-Price Swaps~~					CIG Basis Protection Swaps	~~CIG Basis Protection Swaps~~
Commodity/		Quantity (Gas-			Weighted Average Contract Price						Quantity (Gas-Mmbtu			Weighted Average Contract			Quantity (Gas-			Weighted Average Contract				Fair Value at June 30,
	Quantity (Gas-			Weighted Average Contract Price						Quantity (Gas-Mmbtu			Weighted Average Contract			Quantity (Gas-			Weighted Average Contract				Fair Value at September 30,
Index		Mmbtu)			Floors			Ceilings			Oil-Bbls)			Price			Mmbtu)			Price				2010(1)
Commodity/ Index	Mmbtu)(1)			Floors			Ceilings			Oil-Bbls)(1)			Price			Mmbtu)(1)			Price				2010(2)
Natural Gas
CIG
10/01 - 12/31/2010		35,710	~~35,710~~	$	$4.75	~~4.75~~	$	$9.45	~~9.45~~		—	-	$	$—	-		—	-	$	$—	-		$	$39,774	~~21,796~~
01/01 - 03/31/2011		53,565	~~53,565~~		4.75	~~4.75~~		9.45	~~9.45~~		—	-		—	-		—	-		—	-			49,712	~~26,693~~
NYMEX
07/01 - 09/30/2010			-			-			-			130,629			5.56			124,865			(1.88	)			(27,899	)
10/01 - 12/31/2010		15,514			5.75			8.30			72,654			6.07			85,961			(1.88	)			60,826
10/01 - 12/31/2010			15,514			5.75			8.30			72,654			6.07			85,961			(1.88	)			(2,620	)
01/01 - 03/31/2011		21,022			5.75			8.30			38,758			6.81			59,780			(1.88	)			42,065
01/01 - 03/31/2011			21,022			5.75			8.30			38,758			6.81			59,780			(1.88	)			(9,482	)
04/01 - 06/30/2011		—			—			—			113,252			6.78			113,252			(1.88	)			134,793
04/01 - 06/30/2011			-			-			-			113,252			6.78			113,252			(1.88	)			40,336
07/01 - 09/30/2011		—			—			—			111,525			6.73			111,525			(1.88	)			109,396
07/01 - 12/31/2011			-			-			-			219,979			6.76			219,979			(1.88	)			3,670
10/01 - 12/31/2011		—			—			—			108,454			6.78			108,454			(1.88	)			68,147
2012-2013		28,595	~~28,595~~		6.00	~~6.00~~		8.27	~~8.27~~		752,556	~~752,556~~		7.05	~~7.05~~		781,150	~~781,150~~		(1.88	~~(1.88~~)	)		390,256	~~(32,855~~	)
Total Natural Gas		154,406	~~154,406~~								1,197,199	~~1,327,828~~					1,260,122	~~1,384,987~~						894,969	~~19,639~~
Oil
NYMEX
07/01 - 09/30/2010			-			-			-			3,336			92.96			-			-				55,169
10/01 - 12/31/2010		—			—			—			3,336			92.96			—			—				38,984
10/01 - 12/31/2010			-			-			-			3,336			92.96			-			-				50,716
01/01 - 03/31/2011		—			—			—			1,476			70.75			—			—				(17,709	)
01/01 - 03/31/2011			-			-			-			1,476			70.75			-			-				(10,837	)
04/01 - 06/30/2011		—			—			—			1,487			70.75			—			—				(19,460	)
04/01 - 06/30/2011			-			-			-			1,487			70.75			-			-				(12,110	)
07/01 - 09/30/2011		—			—			—			1,483			70.75			—			—				(20,589	)
07/01 - 12/31/2011			-			-			-			2,986			70.75			-			-				(26,128	)
10/01 - 12/31/2011		—			—			—			1,503			70.75			—			—				(21,877	)
Total Oil		—	-								9,285	~~12,621~~					—	-						(40,651	~~56,810~~)
Total Natural Gas and Oil																							$	$854,318	~~76,449~~

(1) A standard unit of measure for natural gas (one MMBtu equals one Mcf). (2) Approximately 119% of the fair value of the Partnership’s derivative assets and all of the Partnership’s derivative liabilities were measured using significant unobservable inputs (Level 3), see Note 4, Fair Value Measurements, to the accompanying unaudited condensed financial statements included in this report.

Natural Gas and Oil Production Costs

Generally, natural gas and oil production costs vary with changes in total natural gas and oil sales and production volumes. Production taxes are estimates by the Managing General Partner based on tax rates determined using published information. These estimates are subject to revision based on actual amounts determined during future filings by the Managing General Partner with the taxing authorities. Production taxes vary directly with total natural gas and oil sales. Transportation costs vary directly with production volumes. Fixed monthly well operating costs increase on a per unit basis as production decreases per the historical decline curve. In addition, general oil field services and all other costs vary and can fluctuate based on services required but are expected to increase as wells age and require more extensive repair and maintenance. These costs include water hauling and disposal, equipment repairs and maintenance, snow removal, environmental compliance and remediation, and service rig workovers.

- 16 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

~~Six~~Nine months ended ~~June~~September 30, 2010 as compared to ~~six~~nine months ended ~~June~~September 30, 2009

For the ~~six~~nine months ended ~~June~~September 30, 2010 compared to the same period in 2009, natural gas and oil production, on an energy equivalency-basis, decreased 1012%, ~~which~~due ~~reflects~~to innormal ~~part, the normally-occurring~~ production declines ~~throughout~~for athis ~~natural~~stage ~~gas~~in ~~and~~the ~~oil well~~wells’s production life cycle. Additionally, Grand Valley Field operational constraints on most wells, ~~also~~in ~~contributed to~~ the ~~production~~first ~~decline~~half ~~during~~of the ~~current~~year ~~period. Production~~ and ~~operating~~three ~~costs~~Grand ~~were~~Valley ~~lower~~well byworkovers ~~approximately~~noted ~~$0.1 million or 17%~~below, ~~due~~also incontributed ~~part,~~ to ~~lower lease operating expenses due to~~ the ~~Managing General Partner’s cost cutting initiatives partially offset by increased~~ production ~~taxes~~decline ~~due~~during ~~to higher commodity valuations. Additionally, 2010 well operations costs rose as a result of~~ the ~~increase~~current in the per well operations fee charged by the Managing General Partner, consistent with the terms of the D&O Agreement. Production and operating costs per Mcfe were $1.48 for the six months ended June 30, of 2010 compared to $1.61 for the comparable period ~~in 2009~~.

~~Three~~Production ~~months~~and ~~ended~~operating ~~June~~costs 30were lower by approximately $0.2 million or 14%, ~~2010~~due asin ~~compared~~part, to lower lease operating expenses due to the Managing General Partner’s cost cutting initiatives partially offset by three well workovers and increased production taxes due to higher commodity valuations. Additionally, 2010 well operations costs rose as a result of the increase in the per well operations fee charged by the Managing General Partner, consistent with the terms of the D&O Agreement. Production and operating costs per Mcfe were $1.72 for the nine months ended ~~June~~September 30, of 2010 compared to $1.74 for the comparable period in 2009.

~~For~~Three ~~the~~months ~~quarter~~ ended ~~June~~September 30, 2010 ~~compared to the same period in 2009, natural gas and oil production on an energy equivalency-basis, decreased 4%, primarily~~ as acompared ~~result of the Partnership wells’ expected normally-occurring production life-cycle declines. Production and operating costs were lower by approximately $0.1 million, or 18% due~~ to ~~lower~~three ~~lease~~months ~~operating costs that were partially offset by higher production taxes and well operations fees, as noted above. Production and operating costs per Mcfe were $1.64 and $1.92 for the quarter~~ ended ~~June~~September 30, ~~2010 and~~ 2009~~, respectively.~~

For the quarter ended September 30, 2010 compared to the same period in 2009, natural gas and oil production, on an energy equivalency-basis, decreased 18%, primarily as a result of normal production decline as well as the Partnership wells’ reduced performance due the Grand Valley well workovers during the quarter.

Production and operating costs were lower by approximately $0.1 million, or 8% due to lower lease operating costs that were partially offset the three Grand Valley well workovers. Production and operating costs per Mcfe were $2.23 and $1.98 for the quarter ended September 30, 2010 and 2009, respectively.

Direct Costs−General and Administrative

~~Six~~Nine months ended ~~June~~September 30, 2010 as compared to ~~six~~nine months ended ~~June~~September 30, 2009

Direct costs – general and administrative consist primarily of professional fees for financial statement audits, income tax return preparation, independent engineer’s reserve reports and legal matters. Direct costs decreased during the ~~six~~nine months ended ~~June~~September 30, 2010, compared to the same period in 2009, by approximately $0.2 million principally due to reduced billings for professional services.

Three months ended ~~June~~September 30, 2010 as compared to three months ended ~~June~~September 30, 2009

Direct costs – general and administrative consist primarily of professional fees for financial statement audits, income tax return preparation, independent engineer’s reserve reports and legal matters. Direct costs decreased during the three months ended ~~June~~September 30, 2010, compared to the same period in 2009, by approximately $~~0.1~~45,000 ~~million~~ principally due to reduced billings for professional services.

Depreciation, Depletion and Amortization

DD&A expense related to natural gas and oil properties is directly related to production volumes for the period. For the quarter ended ~~June~~September 30, 2009, the Partnership’s natural gas and oil economically producible reserve quantities were determined by valuing in-ground natural gas and oil resources, at the price of natural gas and oil as of December 31, 2008. Upon adoption, in the fourth quarter of 2009, of the SEC’s final rule regarding the modernization of oil and gas reporting, the Partnership changed to a valuation price determined by the 12-month average of the first-day-of-the-month price during each month of 2009.

Six months ended June 30, 2010 as compared to six months ended June 30, 2009

The DD&A expense rate per Mcfe decreased to $3.51 for the 2010 six month period, compared to $4.31 during the same period in 2009, as calculated by the respective methodologies described above. The decrease in the per Mcfe rates for the 2010 period compared to the 2009 period is primarily the result of the changing production mix between the Partnership’s Wattenberg and Grand Valley Fields, which have significantly different DD&A rates. This was effected by field-level depletion rate changes due to reserve revisions at December 31, 2009 compared to December 31, 2008, in which proved developed producing downward revisions in the Partnership’s Grand Valley Field were offset by upward proved developed producing revisions in its Wattenberg Field. The decreased DD&A expense rate, combined with the production declines noted in previous sections, resulted in a decreased DD&A expense of approximately $0.5 million for the 2010 six month period compared to the same 2009 period. During the 2009 six month period, an out of period expense recorded in the first quarter of 2009 increased DD&A expense by approximately $106,000.

- 17 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

~~Three~~Nine months ended ~~June~~September 30, 2010 as compared to ~~three~~nine months ended ~~June~~September 30, 2009

The DD&A expense rate per Mcfe decreased to $3.4941 for the 2010 ~~second~~nine ~~quarter~~month period, compared to $4.0318 during the same ~~quarter~~period in 2009, as calculated by the respective methodologies described above. The decrease in the per Mcfe rates for the 2010 ~~second~~period ~~quarter~~ compared to the 2009 ~~second~~period ~~quarter~~ is aprimarily ~~result of~~ the ~~combined~~result ~~effects~~ of the changing production mix between ~~fields~~the Partnership’s Wattenberg and ~~changes~~Grand inValley Fields, which have significantly different DD&A rates. This was affected by field-level depletion ~~rates~~rate changes due to reserve revisions at December 31, ~~noted~~2009 ~~above~~compared to December 31, 2008, in which proved developed producing downward revisions in the Partnership’s Grand Valley Field were offset by upward proved developed producing revisions in its Wattenberg Field. The ~~lower~~decreased DD&A expense rate, combined with the ~~effect of the~~ production declines noted in previous sections, resulted in ~~the~~a decreased DD&A expense ~~reduction~~ of approximately $0.18 million for the 2010 ~~second~~nine ~~quarter~~month period compared to the same 2009 period. During the 2009 nine month period, an out of period expense recorded in the first quarter of 2009 increased DD&A expense by approximately $106,000.

Three months ended September 30, 2010 as compared to three months ended September 30, 2009

The DD&A expense rate per Mcfe decreased to $3.18 for the 2010 third quarter, compared to $3.94 during the same quarter in 2009 as calculated by the respective methodologies described above. The decrease in the per Mcfe rates for the 2010 third quarter compared to the 2009 third quarter is a result of the combined effects of the changing production mix between fields and changes in field-level depletion rates, noted above. The lower DD&A expense rate, combined with the effect of the production declines noted in previous sections, resulted in the DD&A expense reduction of $0.3 million for the 2010 third quarter compared to the same 2009 quarter.

Capital Resources and Liquidity

The Partnership’s primary sources of cash for both the three and the ~~six~~nine months ended ~~June~~September 30, 2010 were from funds provided by operating activities which include the sale of natural gas and oil production and the realized gains from the Partnership’s derivative positions. These sources of cash were primarily used to fund the Partnership’s operating costs, general and administrative activities and provide monthly distributions to the Investor Partners and PDC, the Managing General Partner. Fluctuations in the Partnership’s operating cash flow are substantially driven by changes in commodity prices, in production volumes and in realized gains and losses from commodity positions. Commodity prices have historically been volatile and the Partnership attempts to manage this volatility through derivatives. Therefore, the primary source of the Partnership’s cash flow from operations becomes the net activity between the Partnership’s natural gas and oil sales and realized derivative gains and losses. However, the Partnership does not engage in speculative positions, nor does the Partnership hold economic hedges for 100% of the Partnership’s expected future production from producing wells and therefore may still experience significant fluctuations in cash flows from operations. As of ~~June~~September 30, 2010, the Partnership had natural gas and oil derivative positions in place covering 7472% of the expected natural gas production and 71% of expected oil production for the remainder of 2010, at an average price of $4.0534 per Mcf and $92.96 per Bbl, respectively. The Partnership’s current derivative position average prices have declined from the significantly higher average commodity contract strike price levels in effect during the 2009 comparative period which were the result of contracts entered into during the high 2008 commodity price market; accordingly, the Partnership anticipates realized gains for the next 12 months to remain substantially below gains realized in 2009 and the first quarter of 2010. See Results of Operations for further discussion of the impact of prices and volumes on sales from operations and the impact of derivative activities on the Partnership’s revenues.

The Partnership’s future operations are expected to be conducted with available funds and revenues generated from natural gas and oil production activities and commodity gains (losses). Natural gas and oil production from the Partnership’s existing properties are generally expected to continue a gradual decline in the rate of production over the remaining lives of the wells. Therefore, the Partnership anticipates a lower annual level of natural gas and oil production and, in the absence of significant price increases or recompletions, lower revenues. The Partnership also expects cash flows from operations to decline if commodity prices remain at current levels or decrease in the future. Under these circumstances decreased production would have a material negative impact on the Partnership’s operations and may result in reduced cash distributions to the Investor Partners through the remainder of 2010 and beyond, and may substantially reduce or restrict the Partnership’s ability to participate in the Well Recompletion Plan activities which are more fully described in Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations−Well Recompletion Plan. Future cash distributions may also be reduced to fund the Wattenberg Field Codell formation well recompletions.

- 18 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

The Partnership’s future operations are expected to be conducted with available funds and revenues generated from natural gas and oil production activities and commodity gains, if any. Natural gas and oil production from the Partnership’s existing properties are generally expected to continue a gradual decline in the rate of production over the remaining lives of the wells. Therefore, the Partnership anticipates a lower annual level of natural gas and oil production and, in the absence of significant price increases or successful refracturings, lower revenues. The Partnership also expects cash flows from operations to decline if commodity prices remain at current levels or decrease in the future. Under these circumstances decreased production would have a material negative impact on the Partnership’s operations and may result in reduced cash distributions to the Investor Partners through the remainder of 2010 and beyond, and may substantially reduce or restrict the Partnership’s ability to participate in the Well Refracturing Plan activities which are more fully described in Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations−Well Refracturing Plan.

Working Capital

Working capital at ~~June~~September 30, 2010 was unchanged at $01.80 million compared to the Partnership’s working capital ~~of $1.0 million~~ at December 31, 2009. ~~This~~Changes ~~decrease~~during ofthe ~~approximately~~nine ~~$0.2~~month ~~million~~comparison ~~was~~period ~~primarily due to the following changes~~ in accounts receivable or payable balances that comprise working capital are as follows:

·● ~~Natural~~Cash ~~gas~~ and ~~oil~~cash ~~receivables~~equivalents ~~decreased~~increased toby $0.61 million as of ~~June~~September 30, 2010, ~~from~~compared ~~$0.8~~to ~~million as of~~ December 31, 2009.

·● ~~Realized~~Natural ~~derivative~~gas ~~gains~~and oil receivables decreased toby ~~approximately~~ $0.12 million as of ~~June~~September 30, 2010, ~~from~~compared ~~$0.4~~to ~~million as of~~ December 31, 2009.

·● ~~Net~~Realized ~~short-term unrealized~~ derivative gains ~~receivable~~receivables ~~increased~~decreased toby ~~approximately~~ $0.13 million as of ~~June~~September 30, 2010 compared to December 31, 2009.

·● ~~Due~~Net ~~to Managing General Partner~~short-~~other,~~term ~~net,~~unrealized ~~excluding natural gas and oil sales received from third parties and realized~~ derivative gains, ~~decreased~~receivable toincreased aby approximately $0.24 million ~~liability~~ as of ~~June~~September 30, 2010, ~~from~~compared ato ~~$0.4 million liability as of~~ December 31, 2009 ~~due to Partnership pay down to Managing General Partner~~.

Working capital, primarily cash and cash equivalents, is expected to increase during early 2011 due to the Partnership’s withholding cash from the investors for the initial Wattenberg Field well refracturing activities. Cash will begin to decrease as the funds are utilized in payment of the completed refracturing activities, currently planned to occur during mid-to-late 2011. Funding for the Well Refracturing Plan will be provided by the withholding of distributable cash flows from the Managing General Partner and Investor Partners on a pro-rata basis. Working capital is expected to similarly fluctuate by increasing during periods of Well Refracturing Plan funding and by decreasing during periods when payments are made for completed well refracturing.

Cash Flows

Cash Flows From Investing Activities

The Partnership, from time-to-time, invests in additional equipment which supports treatment, delivery and measurement of natural gas and oil or environmental protection. These amounts totaled approximately $1327,000 and $1826,000 for the ~~six~~nine months ended ~~June~~September 30, 2010 and 2009, respectively. The Partnership received an approximately $109,000 drilling advance refund from the Managing General Partner during the nine month period ended September 30, 2009.

Cash Flows From Financing Activities

The Partnership initiated monthly cash distributions to investors in September 2005 and has distributed $42.4 million through June 30, 2010. The table below presents the cash distributions to the Managing General Partner and Investor Partners, including Managing General Partner distributions relating to limited partnership units repurchased, for the periods described.

Three months ended June 30,	Managing General Partner Distributions		Investor Partners Distributions		Total Distributions
2010	$	210,385	$	841,541	$	1,051,926
2009	$	331,745	$	1,326,987	$	1,658,732
Six months ended June 30,	Managing General Partner Distributions		Investor Partners Distributions		Total Distributions
2010	$	465,936	$	1,863,744	$	2,329,680
2009	$	521,299	$	2,085,203	$	2,606,502

- 19 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Cash Flows From Financing Activities

The Partnership initiated monthly cash distributions to investors in September 2005 and has distributed $43.0 million through September 30, 2010. The table below presents the cash distributions to the Managing General Partner and Investor Partners, including Managing General Partner distributions relating to limited partnership units repurchased, for the periods described.

Three months ended September 30,	Managing General Partner Distributions		Investor Partners Distributions		Total Distributions
2010	$	117,981	$	471,924	$	589,905

2009	$	359,390	$	1,437,561	$	1,796,951

Nine months ended September 30,	Managing General Partner Distributions		Investor Partners Distributions		Total Distributions

2010	$	583,917	$	2,335,668	$	2,919,585

2009	$	880,689	$	3,522,764	$	4,403,453

The Partnership began funding for the Well Refracturing Plan during October 2010. On a pro-rata basis based on percentage of ownership in the Partnership, the Partnership withheld $4,000 and $16,000 from the Managing General Partner and Investor Partners’ share, respectively, of distributable cash flows from the Partnership’s August 2010 natural gas and oil revenues distributed in October 2010. The October 2010 and subsequent withholdings will provide the funding for planned Wattenberg Field well refracturing costs to be incurred during 2011, and thereafter.

Cash Flows From Operating Activities

Net cash provided by operating activities was $2.3.0 million for the ~~six~~nine months ended ~~June~~September 30, 2010, compared to approximately $24.62 million for the comparable period in 2009. The approximately $01.32 million decrease in cash provided by operating activities was due primarily to the following:

·● An increase in natural gas and oil sales receipts of $0.76 million, or 3923%, accompanied by decreases in natural gas and oil production costs of approximately $0.12 million or 1714% and direct costs – general and administrative of $0.2 million, or 1767%;

·● A decrease in commodity price risk management realized gains receipts of $01.85 million, or 4661%; ~~and~~

·● A decrease in ~~the liability~~ Due to Managing General Partner-other, net, receipts of approximately $0.7 million, excluding natural gas and oil sales received from third parties and realized derivative gains~~, of approximately $0~~.~~5 million.~~

Commitments and Contingencies

See Note 6, Commitments and Contingencies, to the accompanying unaudited condensed financial statements, included in this report.

Recent Accounting Standards

See Note 2, Recent Accounting Standards to the accompanying unaudited condensed financial statements, included in this report.

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INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Critical Accounting Policies and Estimates

The preparation of the accompanying unaudited condensed financial statements in conformity with U.S. GAAP requires management to use judgment in making estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities and the reported amounts of revenue and expenses.

There have been no other significant changes to the Partnership’s critical accounting policies and estimates or in the underlying accounting assumptions and estimates used in these critical accounting policies from those disclosed in the financial statements and accompanying notes contained in the Partnership’s 2009 Form 10-K, such policies include revenue recognition, derivatives instruments, fair value measurements, natural gas and oil properties, and asset retirement obligations are based on, among other things, judgments and assumptions made by management that include inherent risks and uncertainties.

Off-Balance Sheet Arrangements

Currently, the Partnership does not have any off-balance sheet arrangements.

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Index

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Item 3.

Quantitative and Qualitative Disclosures About Market Risk

Not applicable.

Item 4T4. Controls and Procedures

The Partnership has no direct management or officers. The management, officers and other employees that provide services on behalf of the Partnership are employed by the Managing General Partner.

(a) Evaluation of Disclosure Controls and Procedures

As of ~~June~~September 30, 2010, PDC, as Managing General Partner of the Partnership, carried out an evaluation under the supervision and with the participation of the Managing General Partner’s management, including the Chief Executive Officer and the Chief Financial Officer, of the effectiveness of the design and operation of the Partnership’s disclosure controls and procedures pursuant to Securities Exchange Act Rule 13a-15(e) and 15d-15(e). This evaluation considered the various processes carried out under the direction of the Managing General Partner’s Disclosure Committee in an effort to ensure that information required to be disclosed in the SEC reports that we file or submit under the Exchange Act are recorded, processed, summarized and reported within the time periods specified by the SEC’s rules and forms, and that such information is accumulated and communicated to the Partnership’s management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely discussion regarding required financial disclosure.

Based on the results of this evaluation, the Managing General Partner’s Chief Executive Officer and the Chief Financial Officer concluded that the Partnership’s disclosure controls and procedures were effective as of ~~June~~September 30, 2010.

(b) Changes in Internal Control over Financial Reporting

PDC, the Managing General Partner, made no changes in the Partnership’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) of the Securities Exchange Act of 1934) during the quarter ended ~~June~~September 30, 2010, that have materially affected or are reasonably likely to materially affect the Partnership’s internal control over financial reporting.

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~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

PART II – OTHER INFORMATION

Item 1.

Legal Proceedings

Information regarding the Registrant’s legal proceedings can be found in Note 6, Commitments and Contingencies, to the Partnership’s accompanying unaudited condensed financial statements.

Item 1A.

Risk Factors

Not applicable.

Item 2.

Unregistered Sales of Equity Securities and Use of Proceeds

Unit Repurchase Program: Beginning September 2008, the third anniversary of the date of the first Partnership cash distributions, Investor Partners of the Partnership may request that the Managing General Partner repurchase their respective individual Investor Partner units, up to an aggregate total limit during any calendar year for all requesting Investor Partner unit repurchases of 10% of the initial subscription units.

The following table presents information about the Managing General Partner’s limited partner unit repurchases during the three months ended ~~June~~September 30, 2010.

Period	Total Number of Units Repurchased		Average Price Paid per Unit
April 1−30, 2010		-	$	-
July 1—31, 2010		1.25	$	4,756
May 1−31, 2010		-		-
August 1—31, 2010		2.96		4,969
June 1−30, 2010		0.25		4,800
September 1—30, 2010		—		—
Total second quarter Unit Repurchase Program repurchases		0.25
Total third quarter Unit Repurchase Program repurchases		4.21

Item 3.

Defaults Upon Senior Securities

Not applicable.

Item 4.

[Removed and Reserved]

Item 5.

Other Information

Not applicable.

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~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Item 6.

Exhibits

(a) Exhibit Index.

~~Incorporated by Reference~~

Incorporated by Reference

Exhibit Number

~~Exhibit Description~~

Exhibit Description

~~Form~~

Form

~~SEC File Number~~

SEC File Number

~~Exhibit~~

Exhibit

~~Filing Date~~

Filing Date

~~Filed Herewith~~

Filed Herewith

3.1

~~Limited Partnership Agreement (filed by PDC as Managing General Partner for PDC 2004-2006 Drilling Program)~~

Limited Partnership Agreement (filed by PDC as Managing General Partner for PDC 2004-2006 Drilling Program)

~~S-1 Post-Effective Amend 2~~

S-1 Post- Effective Amend 2

~~333-111260~~

333-111260

~~Appendix A~~

Appendix A

~~06/29/2005~~

06/29/2005

3.2

~~Certificate of limited partnership which reflects the organization of the Partnership under West Virginia law~~

Certificate of limited partnership which reflects the organization of the Partnership under West Virginia law

~~10-K~~

10-K

~~000-51309~~

000-51309

~~3.2~~

3.2

~~02/26/2009~~

02/26/2009

10.1

~~Drilling and operating agreement between the Partnership and PDC, as Managing General Partner of the Partnership~~

Drilling and operating agreement between the Partnership and Petroleum Development Corporation, as Managing General Partner.

~~10-K~~

10-K

~~000-51309~~

000-51309

~~10.1~~

10.1

~~02/26/2009~~

02/26/2009

31.1

Rule 13a-14(a)/15d-14(c) Certification of Chief Executive Officer of Petroleum Development Corporation, the Managing General Partner of the Partnership as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

10.2

Form of assignment of leases to the Partnership

10-K

000-51309

10.2

02/26/2009

31.2

Rule 13a-14(a)/15d-14(c) Certification of Chief Financial Officer of Petroleum Development Corporation, the Managing General Partner of the Partnership as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

10.4

Gas Purchase and Processing Agreement between Duke Energy Field Services, Inc.; United States Exploration, Inc.; and Petroleum Development Corporation, dated October 28, 1999 (filed by PDC as Managing General Partner for Rockies Region 2007 Limited Partnership)

10-12G/A Amend 3

000-53201

10.3

03/31/2009

32.1

Title 18 U.S.C. Section 1350 (Section 906 of Sarbanes-Oxley Act of 2002) Certifications by Chief Executive Officer and Chief Financial Officer of Petroleum Development Corporation, the Managing General Partner of the Partnership.

10.5

Gas Purchase and Processing Agreement between Natural Gas Associates, a Colorado partnership, and Aceite Energy Corporation, Walker Exploratory Program 1982- A Limited and Cattle Creek Company, dated October 14, 1983 (filed by PDC as Managing General Partner for Rockies Region 2007 Limited Partnership)

10-12G/A Amend 3

000-53201

10.4

03/31/2009

10.6

Gas Purchase and Processing Agreement between Natural Gas Associates, a Colorado partnership, and SHF Partnership, a Colorado general partnership, Trailblazer Oil and Gas, Inc., Alfa Resources, Inc., Pulsar Oil and Gas, Inc., Overthrust Oil Royalty Corporation, Corvette Petroleum Ltd., Robert Lanari, an individual, and Toby A Martinez, an individual, dated September 21, 1983 (filed by PDC as Managing General Partner for Rockies Region 2007 Limited Partnership)

10-12G/A Amend 3

000-53201

10.5

03/31/2009

- 23 -

~~Index~~INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Incorporated by Reference

Exhibit Number

Exhibit Description

Form

SEC File Number

Exhibit

Filing Date

Filed Herewith

10.7

Domestic Crude Oil Purchase Agreement with ConocoPhillips Company, dated January 1, 1993, as amended by agreements with Teppco Crude Oil, LLC dated August 2, 2007; September 24, 2007; October 17, 2007; January 7, 2008; January 15, 2008; and April 17, 2008 (filed by PDC as Managing General Partner for Rockies Region 2007 Limited Partnership)

10-12G/A

Amend 3

000-53201

10.6

03/31/2009

10.8

Gas Purchase Agreement between Williams Production RMT Company, Riley Natural Gas Company and Petroleum Development Corporation, dated as of June 1, 2006 (filed by PDC as Managing General Partner for Rockies Region 2007 Limited Partnership)

10-12G/A Amend 3

000-53201

10.7

03/31/2009

10.9

Domestic Crude Oil Purchase Agreement between Suncor Energy Marketing Inc. and Petroleum Development Corporation, dated April 22, 2008

10-Q

000-51309

10.1

05/18/2009

31.1

Certification by Chief Executive Officer of Petroleum Development Corporation (dba PDC Energy), the Managing General Partner of the Partnership, pursuant to Rule 13a- 14(a)/15d-14(c) of the Exchange Act Rules, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

- 24 -

INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

Incorporated by Reference

Exhibit Number

Exhibit Description

Form

SEC File Number

Exhibit

Filing Date

Filed Herewith

31.2

Certification by Chief Financial Officer of Petroleum Development Corporation (dba PDC Energy), the Managing General Partner of the Partnership, pursuant to Rule 13a-14(a)/15d-14(c) of the Exchange Act Rules, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1

Certifications by Chief Executive Officer and Chief Financial Officer of Petroleum Development Corporation (dba PDC Energy), the Managing General Partner of the Partnership, pursuant to Title 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of Sarbanes-Oxley Act of 2002.

- 25 -

INDEX

PDC 2005-A LIMITED PARTNERSHIP

(A West Virginia Limited Partnership)

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

PDC 2005-A Limited Partnership ~~By its Managing General Partner Petroleum Development Corporation By: /s/ Richard W. McCullough Richard W. McCullough Chairman and Chief Executive Officer August 13, 2010~~

By its Managing General Partner

Petroleum Development Corporation (dba PDC Energy)

	By	/s/ Richard W. McCullough
	Richard W. McCullough Chairman and Chief Executive Officer of Petroleum Development Corporation (dba PDC Energy)

	November 5, 2010

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated:

Signature	Title	~~Date~~	Date
/s/ Richard W. McCullough	Chairman and Chief Executive Officer	~~August 13, 2010~~	November 5, 2010
Richard W. McCullough	Petroleum Development Corporation (dba PDC Energy)
	Managing General Partner of the Registrant
	(Principal executive officer)
/s/ Gysle R. Shellum	Chief Financial Officer	~~August 13, 2010~~	November 5, 2010
Gysle R. Shellum	Petroleum Development Corporation (dba PDC Energy)
	Managing General Partner of the Registrant
	(Principal financial officer)
/s/ R. Scott Meyers	Chief Accounting Officer	~~August 13, 2010~~	November 5, 2010
R. Scott Meyers	Petroleum Development Corporation (dba PDC Energy)
	Managing General Partner of the Registrant
	(Principal accounting officer)

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Filing Compare · PDC 2005-A Limited Partnership