El Paso Corporation, Xcel Energy Announce Joint Venture for Development of Pipeline and Storage Infrastructure in Colorado

01/31/2007

HOUSTON, Jan. 31 /PRNewswire-FirstCall/ -- Colorado Interstate Gas (CIG), a subsidiary of El Paso Corporation (NYSE: EP), and Xcel Energy (NYSE: XEL) announced today that WYCO Development LLC plans to develop and lease new natural gas transportation and storage facilities in Colorado. WYCO was jointly formed in 1999 to develop and lease gas pipeline and compression facilities. The companies are equal partners in the joint venture to develop the proposed High Plains Pipeline Project.

The proposed project includes approximately 164 miles of natural gas transmission pipeline and natural gas storage facilities having working gas capacity of approximately 7 billion cubic feet. The facilities will be regulated by the Federal Energy Regulatory Commission (FERC) and leased and operated by CIG. CIG expects to file applications with FERC in the spring and fall of 2007.

CIG is holding a binding open season for the proposed project. A pipeline open season began January 12, 2007 and runs through February 12, 2007. A binding open season for the storage project began January 16, 2007 and runs through February 16, 2007. Questions concerning the open seasons or requests to obtain precedent agreements and offer sheets should be referred to Greg Ruben at CIG at (719) 520-4870.

El Paso Corporation provides natural gas and related energy products in a safe, efficient, and dependable manner. The company owns North America's largest natural gas pipeline system and one of North America's largest independent natural gas producers. For more information, visit http://www.elpaso.com .

Xcel Energy is a major U.S. electricity and natural gas company with regulated operations in eight Western and Midwestern states. Xcel Energy provides a comprehensive portfolio of energy-related products and services to 3.3 million electricity customers and 1.8 million natural gas customers through its regulated operating companies. Company headquarters are located in Minneapolis. More information is available at http://www.xcelenergy.com .

El Paso Cautionary Statement Regarding Forward-Looking Statements

This release includes forward-looking statements and projections, made in reliance on the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. 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, including, without limitation, the receipt of the necessary capacity commitments for the project described in this release; the receipt of necessary governmental approvals for such project; our ability to obtain all necessary regulatory approvals and to successfully construct and operate the proposed facilities described in this release; general economic conditions in geographic regions or markets served by El Paso Corporation and its affiliates, or where operations of the company and its affiliates are located, and other factors described in the company's (and its affiliates') 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.

Xcel Energy Cautionary Statement Regarding Forward-Looking Statements

This press release includes forward-looking statements that are subject to certain risks, uncertainties and assumptions. Such forward-looking statements include projected earnings, cash flows, capital expenditures and other statements and are identified in this document by the words "anticipate," "estimate," "expect," "projected," "objective," "outlook," "possible," "potential" and similar expressions. Actual results may vary materially. Factors that could cause actual results to differ materially include, but are not limited to: general economic conditions, including the availability of credit, actions of rating agencies and their impact on capital expenditures; business conditions in the energy industry; competitive factors; unusual weather; effects of geopolitical events, including war and acts of terrorism; changes in federal or state legislation; regulation; costs and other effects of legal administrative proceedings, settlements, investigations and claims including litigation related to company-owned life insurance (COLI); actions of accounting regulatory bodies; the higher degree of risk associated with Xcel Energy's nonregulated businesses compared with Xcel Energy's regulated business; and other risk factors listed from time to time by Xcel Energy in reports filed with the SEC, including Exhibit 99.01 to Xcel Energy's report on Form 10-K for year 2005.

SOURCE El Paso Corporation; Xcel Energy

Contact: Bruce L. Connery, Vice President - Investor and Public Relations, +1-713-420-5855, or Richard Wheatley, Manager - Media Relations, +1-713-420-6828, or fax, +1-713-420-6341, both of El Paso Corporation; or Mark Stutz, Media Relations of Xcel Energy, +1-303-294-2080