8-K

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): March 15, 2010

SOUTHERN UNION COMPANY

(Exact name of registrant as specified in its charter)

Delaware	1-6407	75-0571592
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

5444 Westheimer Road Houston, Texas (Address of principal executive offices) 77056-5306 (Zip Code)

Registrant's telephone number, including area code: (713) 989-2000

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 7.01 Regulation FD Disclosure

ITEM 8.01 Other Events

Southern Union Company (the “Company”) today issued a press release announcing that it recently received approval from the Federal Energy Regulatory Commission to place its Trunkline LNG Company, LLC  Infrastructure Enhancement Project (“IEP”) into service.

The press release, which is attached hereto as Exhibit 99.1, also contains previously issued financial guidance relating to the expected annual impact of IEP on the Company. The financial guidance presented in the press release is provided under 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, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such a filing. 

ITEM 9.01. Financial Statements and Exhibits.

(d) Exhibits.

        Exhibit No.                   Exhibit

               99.1  Company’s March 15, 2010 Press Release

This 8-K includes forward-looking statements and projections.  The Company has made every reasonable effort to ensure that the information and assumptions on which these statements and projections are based are current, reasonable, and complete. However, a variety of factors could cause actual results to differ materially from the projections, anticipated results or other expectations expressed in this release.  Important factors that could cause actual results to differ materially from the projections, anticipated results or other expectations herein are enumerated in the Company’s Securities and Exchange Commission filings.  While the Company makes these statements and projections in good faith, neither the Company nor its management can guarantee that anticipated future results will be achieved. Reference must be made to those filings for additional important factors that may affect actual results. The Company assumes no obligation to publicly update or revise any forward-looking statements made herein or any other forward-looking statements made by the Company, whether as a result of new information, future events, or otherwise.

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.

	SOUTHERN UNION COMPANY
	(Registrant)
Date: March 15, 2010	By:	/s/ Robert M. Kerrigan, III
		Robert M. Kerrigan, III
		Vice President - Assistant General Counsel and Secretary

EXHIBIT INDEX

              Exhibit No.                                     Description

                    99.1  Company’s March 15, 2010 Press Release

EX-99.1

10-04

For further information:

John F. Walsh

Vice President - Investor Relations

Southern Union Company

212-659-3208

SOUTHERN UNION’S TRUNKLINE LNG INFRASTRUCTURE ENHANCEMENT PROJECT PLACED IN-SERVICE

HOUSTON, March 15, 2010 –Southern Union Company (NYSE:SUG) announced that it recently received approval from the Federal Energy Regulatory Commission to place its Trunkline LNG Infrastructure Enhancement Project (“IEP”) into service.

IEP involved two separate components:  the installation of four ambient air vaporization units (“AVUs”) and the construction of a natural gas liquids extraction facility.  Trunkline LNG Company LLC (“Trunkline LNG”), located in Lake Charles, LA, is the only liquefied natural gas (“LNG”) regasification terminal in North America to employ ambient air vaporization technology.  Utilization of the AVUs will significantly improve fuel efficiency during the regasification process, for the benefit of Trunkline LNG’s customer, BG LNG Services (“BG”).  Additionally, the availability of a natural gas liquids extraction facility will provide BG with greater flexibility in sourcing its LNG supply.  The Trunkline LNG terminal is fully contracted to BG through 2030. 

President and COO Eric D. Herschmann said, “We are extremely pleased to have placed IEP into service.  This technologically advanced project showcases the leadership position that Trunkline LNG enjoys within the industry.  The long-term nature of our contract with BG, coupled with the stable nature of Trunkline LNG’s cash flows, will benefit the company and its shareholders for decades to come.”

IEP cost approximately $430 million, excluding capitalized interest, and is expected to generate operating income in the range of $55 to $60 million per year.

About Southern Union Company

Southern Union Company, headquartered in Houston, is one of the nation’s leading diversified natural gas companies, engaged primarily in the transportation, storage, gathering, processing and distribution of natural gas. The company owns and operates one of the nation’s largest natural gas pipeline systems with more than 20,000 miles of gathering and transportation pipelines and one of North America’s largest liquefied natural gas import terminals, along with serving more than half a million natural gas end-user customers in Missouri and Massachusetts.  For further information, visit www.sug.com.

Forward-Looking Information

This news release includes forward-looking statements and projections.  The Company has made every reasonable effort to ensure that the information and assumptions on which these statements and projections are based are current, reasonable, and complete. However, a variety of factors could cause actual results to differ materially from the projections, anticipated results or other expectations expressed in this release.  Important factors that could cause actual results to differ materially from the projections, anticipated results or other expectations herein are enumerated in Southern Union’s Securities and Exchange Commission filings.  While the Company makes these statements and projections in good faith, neither the Company nor its management can guarantee that anticipated future results will be achieved. Reference must be made to those filings for additional important factors that may affect actual results. The Company assumes no obligation to publicly update or revise any forward-looking statements made herein or any other forward-looking statements made by the Company, whether as a result of new information, future events, or otherwise.

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