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<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549</B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM 8-K</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>CURRENT REPORT PURSUANT TO SECTION 13
OR 15(d)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>OF THE SECURITIES EXCHANGE ACT OF 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>DATE OF REPORT (DATE OF EARLIEST EVENT
REPORTED)<BR>
September 11, 2012 (September 5, 2012)</B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>BREITBURN ENERGY PARTNERS L.P.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact name of Registrant as specified in
its charter)<BR STYLE="mso-special-character: line-break">
<BR STYLE="mso-special-character: line-break">
</P>

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    <TD STYLE="width: 34%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; font-weight: bold; text-align: center">Delaware<BR> (State or other jurisdiction of<BR> incorporation or organization)</TD>
    <TD STYLE="width: 33%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; font-weight: bold; text-align: center">001-33055<BR> (Commission <BR> File Number)</TD>
    <TD STYLE="width: 33%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; font-weight: bold; text-align: center">74-3169953<BR> (I.R.S. Employer<BR> Identification No.)</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>515 South
Flower Street, Suite 4800<BR>
Los Angeles, CA 90071</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Address of principal executive office)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(213) 225-5900<BR>
</B>(Registrant&rsquo;s telephone number, including area code)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&uml;</FONT> Written communications
pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&uml;</FONT> Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&uml;</FONT> Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&uml;</FONT> Pre-commencement
communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>ITEM 1.01 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Entry
into a Material Definitive Agreement.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">On September 6, 2012, BreitBurn Energy Partners
L.P. (the &ldquo;<B><I>Partnership</I></B>&rdquo;), a Delaware limited partnership, and BreitBurn GP, LLC, a Delaware limited liability
company and the general partner of the Partnership (the &ldquo;<B><I>General Partner</I></B>&rdquo;), entered into an underwriting
agreement (the &ldquo;<B><I>Underwriting Agreement</I></B>&rdquo;) with Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner
&amp; Smith Incorporated, Barclays Capital Inc., Citigroup Global Markets Inc., RBC Capital Markets, LLC and UBS Securities LLC,
as representatives of the several underwriters set forth in Schedule I to the Underwriting Agreement (the &ldquo;<B><I>Underwriters</I></B>&rdquo;),
relating to the public offering of 10,000,000 common units representing limited&nbsp;partner interests&nbsp;in&nbsp;the Partnership
( the &ldquo;<B><I>Common Units</I></B>&rdquo;) at a price to the public of $18.51 per unit (the &ldquo;<B><I>Offering</I></B>&rdquo;).&nbsp;Pursuant
to the Underwriting Agreement, the Partnership also granted the Underwriters a 30-day option to purchase up to an additional 1,500,000
Common Units from the Partnership. On September 7, 2012, the Underwriters notified the Partnership of their exercise in full of
their option to purchase additional Common Units.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Partnership expects the transaction
to close on September 11, 2012, subject to customary closing conditions. The Partnership expects to receive net proceeds from the
Offering of approximately $204.2 million (after deducting underwriting discounts and commissions and estimated expenses) and intends
to use the proceeds to reduce borrowings under its bank credit facility.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Common Units to be issued pursuant to
the Underwriting Agreement are registered under the Securities Act of 1933, as amended (the &ldquo;<B><I>Securities Act</I></B>&rdquo;),
pursuant to a shelf registration statement on Form S-3 (File No. 333-181531) filed on May 18, 2012, which was automatically declared
effective by the Securities and Exchange Commission upon filing.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Underwriting Agreement contains customary
representations, warranties and agreements of the Partnership and the General Partner, and customary conditions to closing, indemnification
obligations of the Partnership, the General Partner and the Underwriters, including for liabilities under the Securities Act, other
obligations of the parties, and termination provisions. The foregoing description of the Underwriting Agreement does not purport
to be complete and is qualified in its entirety by reference to the full text of the Underwriting Agreement, which is filed as
Exhibit 1.1 hereto and incorporated by reference herein.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Certain of the Underwriters and their respective
affiliates have engaged, and may in the future engage in various financial advisory, investment banking and commercial banking
services in the ordinary course of their business for which they have received, and expect to receive, customary fees and expense
reimbursement. Affiliates of certain of the Underwriters are lenders under the Partnership&rsquo;s bank credit facility.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>ITEM 7.01 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Regulation
FD Disclosure.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">On September 5, 2012, the Partnership announced
that it had commenced the Offering. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">On September 6, 2012, the Partnership announced
that that it had priced the Offering at a price to the public of $18.51 per unit. A copy of the press release is furnished as Exhibit
99.2 to this Current Report on Form 8-K.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The information in this Current Report,
including Exhibits 99.1 and 99.2, is being furnished pursuant to Item 7.01 of Form 8-K and shall not be deemed &ldquo;filed&rdquo;
for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that
section or Sections 11 and 12(a)(2) of the Securities Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>ITEM 9.01 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Financial
Statements and Exhibits. </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD NOWRAP STYLE="width: 13%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; border-bottom: black 0.5pt solid">Exhibit No.</P></TD>
    <TD NOWRAP STYLE="width: 1%">
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        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; border-bottom: black 0.5pt solid">Document</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD NOWRAP>&nbsp;</TD>
    <TD NOWRAP>&nbsp;</TD>
    <TD NOWRAP STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">1.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Underwriting Agreement dated September 6, 2012, by and among BreitBurn Energy Partners L.P., BreitBurn GP, LLC, Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner &amp; Smith Incorporated, Barclays Capital Inc., Citigroup Global Markets Inc., RBC Capital Markets, LLC and UBS Securities LLC, as representatives of the several underwriters set forth in Schedule I thereto.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">5.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Opinion of Vinson &amp; Elkins L.L.P. as to legality of the offered Common Units.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">8.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Opinion of Vinson &amp; Elkins L.L.P. regarding tax matters.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">23.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Consent of Vinson &amp; Elkins L.L.P. (included in its opinion filed as Exhibit 5.1)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">23.2</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Consent of Vinson &amp; Elkins L.L.P. (included in its opinion filed as Exhibit 8.1)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">99.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Press Release of BreitBurn Energy Partners L.P. dated September 5, 2012.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">99.2</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Press Release of BreitBurn Energy Partners L.P. dated September 6, 2012.</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><I>SIGNATURES</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">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 thereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 1.8pt">BREITBURN ENERGY PARTNERS L.P.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 25%; padding-right: 0.8pt">&nbsp;</TD>
    <TD STYLE="width: 30%; padding-right: 0.8pt">&nbsp;</TD>
    <TD STYLE="width: 4%; padding-right: 0.8pt">&nbsp;</TD>
    <TD STYLE="width: 41%; padding-right: 0.8pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0.8pt">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt">By:</TD>
    <TD STYLE="padding-right: 0.8pt">BREITBURN GP, LLC,</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0.8pt">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">its general partner</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0.8pt">Dated:&nbsp; September 11, 2012</TD>
    <TD STYLE="padding-right: 0.8pt; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt">By:</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 0.8pt">/s/ James G. Jackson</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0.8pt; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt">James G. Jackson</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0.8pt; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0.8pt; font-weight: bold">&nbsp;</TD>
    <TD NOWRAP STYLE="padding-right: 0.8pt">Chief Financial Officer and Executive Vice President</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="text-transform: uppercase"><B>exhibit
index</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 3in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD NOWRAP STYLE="width: 8%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; border-bottom: black 0.5pt solid">Exhibit No.</P></TD>
    <TD NOWRAP STYLE="width: 1%">
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    <TD NOWRAP STYLE="width: 91%; padding-right: 5.4pt; padding-left: 5.4pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; border-bottom: black 0.5pt solid">Document</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD NOWRAP>&nbsp;</TD>
    <TD NOWRAP>&nbsp;</TD>
    <TD NOWRAP STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">1.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Underwriting Agreement dated September 6, 2012, by and among BreitBurn Energy Partners L.P., BreitBurn GP, LLC, Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner &amp; Smith Incorporated, Barclays Capital Inc., Citigroup Global Markets Inc., RBC Capital Markets, LLC and UBS Securities LLC, as representatives of the several underwriters set forth in Schedule I thereto.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">5.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Opinion of Vinson &amp; Elkins L.L.P. as to legality of the offered Common Units.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">8.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Opinion of Vinson &amp; Elkins L.L.P. regarding tax matters.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">23.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Consent of Vinson &amp; Elkins L.L.P. (included in its opinion filed as Exhibit 5.1)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">23.2</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Consent of Vinson &amp; Elkins L.L.P. (included in its opinion filed as Exhibit 8.1)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">99.1</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Press Release of BreitBurn Energy Partners L.P. dated September 5, 2012.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt">99.2</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">Press Release of BreitBurn Energy Partners L.P. dated September 6, 2012.</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 3in">&nbsp;</P>

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UNITED STATES
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
DATE OF REPORT (DATE OF EARLIEST EVENT
REPORTED)
September 11, 2012 (September 5, 2012)
BREITBURN ENERGY PARTNERS L.P.
(Exact name of Registrant as specified in
its charter)
Delaware
(State or other jurisdiction of
incorporation or organization)
001-33055
(Commission
File Number)
74-3169953
(I.R.S. Employer
Identification No.)
515 South
Flower Street, Suite 4800
Los Angeles, CA 90071
(Address of principal executive office)
(213) 225-5900
(Registrant's telephone number, including area code)
Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
¨
Written communications
pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨
Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨
Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
¨
Pre-commencement
communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
ITEM 1.01           Entry
into a Material Definitive Agreement.
On September 6, 2012, BreitBurn Energy Partners
L.P. (the "
Partnership
"), a Delaware limited partnership, and BreitBurn GP, LLC, a Delaware limited liability
company and the general partner of the Partnership (the "
General Partner
"), entered into an underwriting
agreement (the "
Underwriting Agreement
") with Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner
& Smith Incorporated, Barclays Capital Inc., Citigroup Global Markets Inc., RBC Capital Markets, LLC and UBS Securities LLC,
as representatives of the several underwriters set forth in Schedule I to the Underwriting Agreement (the "
Underwriters
"),
relating to the public offering of 10,000,000 common units representing limited partner interests in the Partnership
( the "
Common Units
") at a price to the public of $18.51 per unit (the "
Offering
"). Pursuant
to the Underwriting Agreement, the Partnership also granted the Underwriters a 30-day option to purchase up to an additional 1,500,000
Common Units from the Partnership. On September 7, 2012, the Underwriters notified the Partnership of their exercise in full of
their option to purchase additional Common Units.
The Partnership expects the transaction
to close on September 11, 2012, subject to customary closing conditions. The Partnership expects to receive net proceeds from the
Offering of approximately $204.2 million (after deducting underwriting discounts and commissions and estimated expenses) and intends
to use the proceeds to reduce borrowings under its bank credit facility.
The Common Units to be issued pursuant to
the Underwriting Agreement are registered under the Securities Act of 1933, as amended (the "
Securities Act
"),
pursuant to a shelf registration statement on Form S-3 (File No. 333-181531) filed on May 18, 2012, which was automatically declared
effective by the Securities and Exchange Commission upon filing.
The Underwriting Agreement contains customary
representations, warranties and agreements of the Partnership and the General Partner, and customary conditions to closing, indemnification
obligations of the Partnership, the General Partner and the Underwriters, including for liabilities under the Securities Act, other
obligations of the parties, and termination provisions. The foregoing description of the Underwriting Agreement does not purport
to be complete and is qualified in its entirety by reference to the full text of the Underwriting Agreement, which is filed as
Exhibit 1.1 hereto and incorporated by reference herein.
Certain of the Underwriters and their respective
affiliates have engaged, and may in the future engage in various financial advisory, investment banking and commercial banking
services in the ordinary course of their business for which they have received, and expect to receive, customary fees and expense
reimbursement. Affiliates of certain of the Underwriters are lenders under the Partnership's bank credit facility.
ITEM 7.01           Regulation
FD Disclosure.
On September 5, 2012, the Partnership announced
that it had commenced the Offering. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.
On September 6, 2012, the Partnership announced
that that it had priced the Offering at a price to the public of $18.51 per unit. A copy of the press release is furnished as Exhibit
99.2 to this Current Report on Form 8-K.
The information in this Current Report,
including Exhibits 99.1 and 99.2, is being furnished pursuant to Item 7.01 of Form 8-K and shall not be deemed "filed"
for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that
section or Sections 11 and 12(a)(2) of the Securities Act.
ITEM 9.01           Financial
Statements and Exhibits.
Exhibit No.
Document
1.1
Underwriting Agreement dated September 6, 2012, by and among BreitBurn Energy Partners L.P., BreitBurn GP, LLC, Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated, Barclays Capital Inc., Citigroup Global Markets Inc., RBC Capital Markets, LLC and UBS Securities LLC, as representatives of the several underwriters set forth in Schedule I thereto.
5.1
Opinion of Vinson & Elkins L.L.P. as to legality of the offered Common Units.
8.1
Opinion of Vinson & Elkins L.L.P. regarding tax matters.
23.1
Consent of Vinson & Elkins L.L.P. (included in its opinion filed as Exhibit 5.1)
23.2
Consent of Vinson & Elkins L.L.P. (included in its opinion filed as Exhibit 8.1)
99.1
Press Release of BreitBurn Energy Partners L.P. dated September 5, 2012.
99.2
Press Release of BreitBurn Energy Partners L.P. dated September 6, 2012.
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 thereunto duly authorized.
BREITBURN ENERGY PARTNERS L.P.
By:
BREITBURN GP, LLC,
its general partner
Dated:  September 11, 2012
By:
/s/ James G. Jackson
James G. Jackson
Chief Financial Officer and Executive Vice President
exhibit
index
Exhibit No.
Document
1.1
Underwriting Agreement dated September 6, 2012, by and among BreitBurn Energy Partners L.P., BreitBurn GP, LLC, Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated, Barclays Capital Inc., Citigroup Global Markets Inc., RBC Capital Markets, LLC and UBS Securities LLC, as representatives of the several underwriters set forth in Schedule I thereto.
5.1
Opinion of Vinson & Elkins L.L.P. as to legality of the offered Common Units.
8.1
Opinion of Vinson & Elkins L.L.P. regarding tax matters.
23.1
Consent of Vinson & Elkins L.L.P. (included in its opinion filed as Exhibit 5.1)
23.2
Consent of Vinson & Elkins L.L.P. (included in its opinion filed as Exhibit 8.1)
99.1
Press Release of BreitBurn Energy Partners L.P. dated September 5, 2012.
99.2
Press Release of BreitBurn Energy Partners L.P. dated September 6, 2012.