UNITED STATES SECURITIES AND EXCHANGE COMMISSION

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

~~Pursuant~~Date of toReport ~~Section 13 OR 15~~(d)Date of ~~The~~earliest ~~Securities~~event ~~Exchange~~reported): ~~Act~~March 31, ~~of 1934~~2011

Date of Report (Date of earliest event reported): November 16, 2010

PDC 2005-A LIMITED PARTNERSHIP

(Exact name of registrant as specified in its charter)

West Virginia		000-51309		20-2088347
(State or other jurisdiction of incorporation)		(Commission File Number)		(~~IRS~~I.R.S. Employer Identification No.)

1775 Sherman Street, Suite 3000 Denver, Colorado		80203
(Address of principal executive offices)		(Zip Code)


1775 Sherman Street, Suite 3000 Denver, Colorado (Address of principal executive offices)		80203 (Zip Code)

Registrant’s telephone number, including area code: (303) 860-5800

Not applicable (Former name or former address, if changed since last report)

~~(Former~~Check ~~name~~the orappropriate ~~former~~box ~~address,~~below if ~~changed~~the ~~since~~Form ~~last~~8-K ~~report~~filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

~~Check~~o ~~the~~Written ~~appropriate~~communications ~~box~~pursuant ~~below if the Form 8-K filing is intended~~ to ~~simultaneously~~Rule ~~satisfy~~425 ~~the~~under ~~filing obligation of~~ the ~~registrant~~Securities ~~under~~Act ~~any~~(17 ofCFR ~~the following provisions:~~230.425)

o ~~Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) þ~~ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

~~Item~~o ~~1.01~~Pre-commencement ~~Entry~~communications ~~into~~pursuant ato ~~Material~~Rule ~~Definitive~~14d-2(b) ~~Agreement~~under the Exchange Act (17 CFR 240.14d-2(b))

Ono ~~November 16, 2010, PDC 2005~~Pre-Acommencement ~~Limited~~communications ~~Partnership (the “Partnership”), Petroleum Development Corporation (dba PDC Energy) (“PDC”) and DP 2004 Merger Sub, LLC, a wholly owned subsidiary of PDC, entered into a merger agreement~~ pursuant to ~~which~~Rule ~~PDC intends to acquire the Partnership, for which it serves as the general partner. The Merger Agreement~~ 13e-4(~~“Merger Agreement”~~c) isunder ~~subject to~~ the ~~vote~~Exchange ~~and~~Act ~~approval of a majority of the limited partnership units held by limited partners of the Partnership, other than PDC and its affiliates~~ (~~“non-affiliated~~17 ~~Investor~~CFR ~~Partners~~240.”13e-4(c))

IfItem ~~approved~~8.01 ~~and~~Other other customary conditions to closing are satisfied, PDC will pay per limited partnership unit held by non-affiliated Investor Partners (other than non-affiliated Investor Partners who properly exercise appraisal rights) the following:Events.

· PDC An2005-A ~~amount~~Limited ~~equal~~Partnership (the “Partnership”) has reported that a special meeting of limited partners of the Partnership was held at 1775 Sherman Street, Suite 3000, Denver, Colorado 80203 on March 25, 2011 at 10:00 a.m., Mountain time, at which the limited partners (not including Petroleum Development Corporation (“PDC”) and its affiliates) approved a proposal to $7adjourn such special meeting. The meeting had been called for such limited partners to vote on (i) an amendment to the Partnership’s partnership agreement that would grant such limited partners an express right to vote to approve merger transactions and (ii) the Agreement and Plan of Merger,~~000~~ ~~per~~dated ~~unit~~as of November 16, 2010 (the “Merger Agreement”), by and among the Partnership, PDC and DP 2004 Merger Sub LLC, and the transactions contemplated thereby. In order to allow time for the further solicitation of proxies from the limited partners, the meeting was adjourned until Friday, May 27, 2011, at 10:00 a.m., Mountain time, at which time the general partner of the Partnership intends to reconvene such special meeting at the same location. No other business was conducted at the meeting prior to its adjournment.

· Investors ~~Plus,~~holding ~~the~~limited ~~sum~~partner ofinterests ~~amounts~~in ~~withheld~~the ~~from~~Partnership ~~per~~should ~~unit~~refer ~~cash~~to ~~distributions~~the bydefinitive proxy statement filed with the ~~Partnership~~Securities ~~from~~and ~~October~~Exchange 1,Commission ~~2010~~(the ~~through~~“SEC”) on February 4, 282011 and mailed to investors on February 7, 2011 for more information about the matters to be considered at the reconvened special meeting. PDC has re-evaluated the merger consideration agreed to in the Merger Agreement and has proposed to offer supplemental merger consideration to the investors in the Partnership’s ~~Well~~limited ~~Refracturing~~partner ~~Plan~~interests. PDC expects to send those investors a proxy supplement that provides information relating to the increased merger consideration and also includes year-end financial statements and the Partnership’s 2010 year-end reserve report. Although there is no assurance of the likelihood or timing of the completion of the SEC proxy disclosure review process or whether the Partnership will obtain the necessary approvals from its limited partners, PDC expects to mail such proxy supplement in late April or early May 2011.

· Less the sum of the per unit cash distributions made after February 28, 2011, for the limited partnership units of the Partnership.

The per unit merger value offered to non-affiliated Investor Partners under the Merger Agreement in exchange for their limited partnership units in the Partnership was based on an effective transaction date of January 1, 2011. Upon clearance by the Securities and Exchange Commission, a definitive proxy statement will be mailed to the Partnership’s limited partners. Although there is no assurance of the likelihood or timing of the completion of the Securities and Exchange Commission’s proxy disclosure review process or whether we will obtain the necessary approvals from non-affiliated Investor Partners, we expect that each of the mergers will close in the first half of 2011. Following consummation of the merger, the Partnership will no longer be a publically traded company, and will no longer be required to file reports with the Securities and Exchange Commission, and the non-affiliated Investor Partners will no longer participate in the Partnership’s future earnings or growth.

The Board of Directors of PDC (the “Board”) formed a special committee, comprised of four directors of PDC who are not officers or employees of the Partnership or PDC and have no economic interest in the Partnership (the “Special Committee”), to represent the interests of the non-affiliated Investor Partners holding limited partnership units. The Special Committee retained its own legal counsel to advise it regarding the terms of the proposed merger. Under the terms of the merger agreement, the Special Committee may cause the Partnership to abandon the proposed merger with, and acquisition by, PDC, at any time prior to the approval of the merger by the limited partners, if the Special Committee believes it has received a superior offer that is in the best interests of the limited partners.

The Merger Agreement has been approved by the PDC’s Board, on behalf of PDC individually, PDC, as sole member of the DP Merger Sub, and by the Special Committee formed by the Board, on behalf of PDC in its capacity as the managing general partner of the Partnership. The merger of the Partnership with and into DP 2004 Merger Sub, LLC is subject to the vote and approval of a majority of the limited partnership units held by non-affiliated Investor Partners as well as the satisfaction of other customary closing conditions, as noted above.

The foregoing description of the merger agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the merger agreement, which is filed as Exhibit 2.1 hereto and is incorporated by reference herein.

Additional Information

THE PARTNERSHIP WILL FILE A PROXY STATEMENT AND OTHER DOCUMENTS WITH THE SECURITIES AND EXCHANGE COMMISSION. INVESTORS AND SECURITY HOLDERS ARE URGED TO CAREFULLY READ THE PROXY STATEMENT WHEN IT BECOMES AVAILABLE BECAUSE IT WILL CONTAIN IMPORTANT INFORMATION REGARDING PDC, THE PARTNERSHIP AND THE MERGER OF THE PARTNERSHIP WITH AND INTO A SUBSIDIARY OF PDC. A DEFINITIVE PROXY STATEMENT WILL BE SENT TO THE LIMITED PARTNERS OF THE PARTNERSHIP SEEKING THEIR APPROVAL OF THE MERGER. INVESTORS AND SECURITY HOLDERS MAY OBTAIN A FREE COPY OF THE DEFINITIVE PROXY STATEMENT (WHEN AVAILABLE) AND OTHER RELEVANT DOCUMENTS FILED BY PDC AND THE PARTNERSHIP WITH THE SEC AT THE SEC’S WEBSITE AT WWW.SEC.GOV.

The definitive proxy statement and such other documents (when available) may also be obtained for free from PDC by directing a request to Petroleum Development Corporation (dba PDC Energy), 1775 Sherman Street, Suite 3000, Denver, CO 80203, Attention: Celesta Miracle; Telephone: (303) 860-5800, E-mail: cmiracle@petd.com. Investors and security holders are urged to read the proxy statement and the other relevant documents when they become available before making any voting or investment decision with respect to the proposed merger.

PDC and certain of its directors, officers and employees may be considered “participants in the solicitation” of proxies from the limited partners of the Partnership. Information regarding such persons and a description of their interest in the merger of the Partnership will be contained in the proxy statement when it is filed. Information concerning beneficial ownership of PDC stock by its directors and certain executive officers is included in its proxy statement, dated April 30, 2010, and subsequent statements of changes in beneficial ownership on file with the SEC.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit
Number		Description
2.1		Agreement and Plan of Merger, dated November 16, 2010, by and among Petroleum Development Corporation (dba PDC Energy), DP 2004 Merger Sub, LLC and PDC 2005-A Limited Partnership.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

PDC 2005-A LIMITED PARTNERSHIP By: PETROLEUM DEVELOPMENT CORPORATION (dba PDC ENERGY), its Managing General Partner


	PDC 2005-A LIMITED PARTNERSHIP
	By:	PETROLEUM DEVELOPMENT CORPORATION, its Managing General Partner



Date: March 31, 2011	By:	/s/ Daniel W. Amidon
		Name:	Daniel W. Amidon
		Title:	General Counsel and Secretary

Date: November 16, 2010	By:	/s/ Gysle R. Shellum
	Name:	Gysle R. Shellum
	Title:	Chief Financial Officer

EXHIBIT INDEX

Exhibit
Number		Description
2.1		Agreement and Plan of Merger, dated November 16, 2010, by and among Petroleum Development Corporation (dba PDC Energy), DP 2004 Merger Sub, LLC and PDC 2005-A Limited Partnership.

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