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<TITLE>SECURITIES AND EXCHANGE COMMISSION</TITLE>
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<FONT SIZE=4><P ALIGN="CENTER">SECURITIES AND EXCHANGE COMMISSION</P>
<P ALIGN="CENTER">Washington, D.C. 20549</P>
<P ALIGN="CENTER"></P>
<B><P ALIGN="CENTER">FORM 8-K</P>
</B><P ALIGN="CENTER"></P>
<P ALIGN="CENTER">CURRENT REPORT</P>
<P ALIGN="CENTER">PURSUANT TO SECTION 13 OR 15(d) OF THE</P>
<P ALIGN="CENTER">SECURITIES EXCHANGE ACT OF 1934</P>
<P ALIGN="CENTER"></P></FONT>
<P ALIGN="CENTER"><CENTER><TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=324>
<TR><TD WIDTH="57%" VALIGN="TOP">
<FONT SIZE=2><P>(Date of report)</FONT></TD>
<TD WIDTH="43%" VALIGN="TOP">
<B><FONT SIZE=3><P>March 21, 2007 </B></FONT></TD>
</TR>
<TR><TD WIDTH="57%" VALIGN="TOP">
<FONT SIZE=2><P>(Date of earliest event reported)</FONT></TD>
<TD WIDTH="43%" VALIGN="TOP">
<B><FONT SIZE=3><P>March 19, 2007</B></FONT></TD>
</TR>
</TABLE>
</CENTER></P>
<P ALIGN="CENTER"></P>
<B><FONT SIZE=5><P ALIGN="CENTER">ONEOK PARTNERS, L.P.</P>
</B></FONT><FONT SIZE=2><P ALIGN="CENTER">(Exact name of registrant as specified in its charter)</P>
</FONT><P ALIGN="CENTER"></P>
<TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=686>
<TR><TD WIDTH="30%" VALIGN="TOP" HEIGHT=19>
<B><P ALIGN="CENTER">Delaware</B></TD>
<TD WIDTH="6%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="31%" VALIGN="TOP" HEIGHT=19>
<B><P ALIGN="CENTER">1-12202</B></TD>
<TD WIDTH="5%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="28%" VALIGN="TOP" HEIGHT=19>
<B><P ALIGN="CENTER">93-1120873</B></TD>
</TR>
<TR><TD WIDTH="30%" VALIGN="TOP" HEIGHT=19>
<FONT SIZE=2><P ALIGN="CENTER">(State or other jurisdiction</FONT></TD>
<TD WIDTH="6%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="31%" VALIGN="TOP" HEIGHT=19>
<FONT SIZE=2><P ALIGN="CENTER">(Commission</FONT></TD>
<TD WIDTH="5%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="28%" VALIGN="TOP" HEIGHT=19>
<FONT SIZE=2><P ALIGN="CENTER">(IRS Employer</FONT></TD>
</TR>
<TR><TD WIDTH="30%" VALIGN="TOP" HEIGHT=19>
<FONT SIZE=2><P ALIGN="CENTER">of incorporation)</FONT></TD>
<TD WIDTH="6%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="31%" VALIGN="TOP" HEIGHT=19>
<FONT SIZE=2><P ALIGN="CENTER">File Number)</FONT></TD>
<TD WIDTH="5%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="28%" VALIGN="TOP" HEIGHT=19>
<FONT SIZE=2><P ALIGN="CENTER">Identification No.)</FONT></TD>
</TR>
</TABLE>
<P ALIGN="CENTER"></P>
<B><P ALIGN="CENTER">100 West Fifth Street; Tulsa, OK</P>
</B><FONT SIZE=2><P ALIGN="CENTER">(Address of principal executive offices)</P>
</FONT><P ALIGN="CENTER"></P>
<B><P ALIGN="CENTER">74103-4298</P>
</B><FONT SIZE=2><P ALIGN="CENTER">(Zip code)</P>
</FONT><P ALIGN="CENTER"></P>
<B><P ALIGN="CENTER">(918) 588-7000</P>
</B><FONT SIZE=2><P ALIGN="CENTER">(Registrant's telephone number, including area code)</P>
</FONT><P ALIGN="CENTER"></P>
<B><P ALIGN="CENTER">Not Applicable</P>
</B><FONT SIZE=2><P ALIGN="CENTER">(Former name or former address, if changed since last report)</P>
</FONT>
<FONT SIZE=2><P>[] Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</P>
<P>[] Soliciting material pursuant to Rule 14a-12 under the Securities Act (17 CFR 240.14a-12)</P>
<P>[] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</P>
<P>[] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</P>
</FONT>
<P>&nbsp;</P>
<P>&nbsp;</P>
<TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=666>
<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=19>
<U><P>Item 8.01</U></TD>
<TD WIDTH="3%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="83%" VALIGN="TOP" HEIGHT=19>
<U><P>Other Events</U></TD>
</TR>
<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=45><P></P></TD>
<TD WIDTH="3%" VALIGN="TOP" HEIGHT=45><P></P></TD>
<TD WIDTH="83%" VALIGN="TOP" HEIGHT=45>
<P>On March 19, 2007, we announced plans to build a $260 million natural gas liquids pipeline from southern Oklahoma through the Barnett Shale natural gas play in northern Texas and continuing on to the Texas Gulf Coast.</P>
<P>The proposed 440-mile Arbuckle Pipeline will originate in Stephens County, Oklahoma, and be designed to initially transport 160,000 barrels per day of raw natural gas liquids for delivery into the Mont Belvieu, Texas, market center. The proposed pipeline will interconnect with our existing fractionation facility at Mont Belvieu and other Gulf Coast-area fractionators.  </P>
<P>Following receipt of all necessary permits, construction of the 12-and 16-inch pipeline is currently expected to be complete by early 2009.  The pipeline will be designed, constructed and operated using proven technology, advanced pipeline control systems and continuous safety monitoring.  </P>
<FONT SIZE=2></FONT></TD>
</TR>
<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="3%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="83%" VALIGN="TOP" HEIGHT=19><P></P></TD>
</TR>
<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=18>
<U><P>Item 9.01</U></TD>
<TD WIDTH="3%" VALIGN="TOP" HEIGHT=18><P></P></TD>
<TD WIDTH="83%" VALIGN="TOP" HEIGHT=18>
<U><P>Financial Statements and Exhibits</U></TD>
</TR>
<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="3%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="83%" VALIGN="TOP" HEIGHT=19>
<P>Exhibits</TD>
</TR>
<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="3%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="83%" VALIGN="TOP" HEIGHT=19><DIR>
<DIR>
<P>99.1      Press release issued by ONEOK Partners, L.P. dated March 19, 2007.</DIR>
</DIR>
</TD>
</TR>
<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=18><P></P></TD>
<TD WIDTH="3%" VALIGN="TOP" HEIGHT=18><P></P></TD>
<TD WIDTH="83%" VALIGN="TOP" HEIGHT=18><P></P></TD>
</TR>
<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=18><P></P></TD>
<TD WIDTH="3%" VALIGN="TOP" HEIGHT=18><P></P></TD>
<TD WIDTH="83%" VALIGN="TOP" HEIGHT=18><P></P></TD>
</TR>
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<FONT SIZE=2><P ALIGN="CENTER">2</P>
</FONT><P ALIGN="CENTER"></P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">&nbsp;</P>
<P ALIGN="CENTER">SIGNATURE</P>
<P>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.</P>
<TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=686>
<TR><TD WIDTH="9%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="47%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="7%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=19>
<P>ONEOK Partners, L.P.</P>
<P>By:  ONEOK Partners GP, L.L.C., General Partner</TD>
</TR>
<TR><TD WIDTH="9%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="47%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="7%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=19><P></P></TD>
</TR>
<TR><TD WIDTH="9%" VALIGN="TOP" HEIGHT=20>
<P>Date:</TD>
<TD WIDTH="47%" VALIGN="TOP" HEIGHT=20>
<P>March 21, 2007</TD>
<TD WIDTH="7%" VALIGN="TOP" HEIGHT=20>
<P>By:</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=20>
<U><P>/s/ Curtis Dinan</U></TD>
</TR>
<TR><TD WIDTH="9%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="47%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="7%" VALIGN="TOP" HEIGHT=19><P></P></TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=19>
<P>Curtis Dinan</TD>
</TR>
<TR><TD WIDTH="9%" VALIGN="TOP" HEIGHT=20><P></P></TD>
<TD WIDTH="47%" VALIGN="TOP" HEIGHT=20><P></P></TD>
<TD WIDTH="7%" VALIGN="TOP" HEIGHT=20><P></P></TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=20>
<P>Senior Vice President - </P>
<P>Chief Financial Officer</P>
<P>and Treasurer</P>
</TD>
</TR>
</TABLE>
<FONT SIZE=2><P>&nbsp;</P>
<P>&nbsp;</P>
<P>&nbsp;</P>
<P ALIGN="CENTER">3</P>
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{"company-data": {"conformed-name": "ONEOK Partners LP", "cik": "0000909281", "assigned-sic": "4922", "irs-number": "931120873", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-12202", "film-number": "07709188"}, "business-address": {"street1": "100 WEST FIFTH STREET", "city": "TULSA", "state": "OK", "zip": "74103", "phone": "918-588-7000"}, "mail-address": {"street1": "100 WEST FIFTH STREET", "city": "TULSA", "state": "OK", "zip": "74103"}, "former-company": {"former-conformed-name": "NORTHERN BORDER PARTNERS LP", "date-changed": "19930719"}}
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
(Date of report)
March 21, 2007
(Date of earliest event reported)
March 19, 2007
ONEOK PARTNERS, L.P.
(Exact name of registrant as specified in its charter)
Delaware
1-12202
93-1120873
(State or other jurisdiction
(Commission
(IRS Employer
of incorporation)
File Number)
Identification No.)
100 West Fifth Street; Tulsa, OK
(Address of principal executive offices)
74103-4298
(Zip code)
(918) 588-7000
(Registrant's telephone number, including area code)
Not Applicable
(Former name or former address, if changed since last report)
[] Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
[] Soliciting material pursuant to Rule 14a-12 under the Securities 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 8.01
Other Events
On March 19, 2007, we announced plans to build a $260 million natural gas liquids pipeline from southern Oklahoma through the Barnett Shale natural gas play in northern Texas and continuing on to the Texas Gulf Coast.
The proposed 440-mile Arbuckle Pipeline will originate in Stephens County, Oklahoma, and be designed to initially transport 160,000 barrels per day of raw natural gas liquids for delivery into the Mont Belvieu, Texas, market center. The proposed pipeline will interconnect with our existing fractionation facility at Mont Belvieu and other Gulf Coast-area fractionators.
Following receipt of all necessary permits, construction of the 12-and 16-inch pipeline is currently expected to be complete by early 2009.  The pipeline will be designed, constructed and operated using proven technology, advanced pipeline control systems and continuous safety monitoring.
Item 9.01
Financial Statements and Exhibits
Exhibits
99.1      Press release issued by ONEOK Partners, L.P. dated March 19, 2007.
2
SIGNATURE
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.
ONEOK Partners, L.P.
By:  ONEOK Partners GP, L.L.C., General Partner
Date:
March 21, 2007
By:
/s/ Curtis Dinan
Curtis Dinan
Senior Vice President -
Chief Financial Officer
and Treasurer
3