1、 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON,D.C.20549 FORM 10-K (Mark One)ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31,2005 OR?TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT
2、 OF 1934 For the transition period from _ to _ Commission file number:01-32665 BOARDWALK PIPELINE PARTNERS,LP(Exact name of registrant as specified in its charter)DELAWARE(State or other jurisdiction of incorporation or organization)20-3265614(I.R.S.Employer Identification No.)3800 Frederica Street,
3、Owensboro,Kentucky 42301(270)926-8686(Address and Telephone Number of Registrants Principal Executive Office)Securities registered pursuant to Section 12(b)of the Act:Title of each class Name of each exchange on which registered Common Units Representing Limited Partner Interests New York Stock Exch
4、ange Securities registered pursuant to Section 12(g)of the Act:NONE Indicate by check mark if the registrant is a well-known seasoned issuer,as defined in Rule 405 of the Securities Act.Yes?No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section
5、15(d)of the Act.Yes?No 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 reports),and(2)has be
6、en subject to such filing requirements for the past 90 days.Yes No?Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein,and will not be contained,to the best of registrants knowledge,in definitive proxy or information statements inc