HPGP Hiland Holdings GP, LP (MM)

ENID, Okla., May 5 /PRNewswire-FirstCall/ -- The Hiland companies, Hiland Partners, LP (NASDAQ:HLND) and Hiland Holdings GP, LP (NASDAQ:HPGP) will announce first quarter 2008 financial results after market close on Thursday, May 8, 2008. Hiland has scheduled a conference call for Friday, May 9, 2008, at 10:00 a.m. Central Time to discuss the 2008 first quarter results. To participate in the call, dial 1.888.396.2298 and participant passcode 92002423, or access it live over the Internet at http://www.hilandpartners.com/, on the "Investor Relations" section of the Partnership's website. About the Hiland Companies Hiland Partners, LP is a publicly traded midstream energy partnership engaged in gathering, compressing, dehydrating, treating, processing and marketing natural gas, and fractionating, or separating, natural gas liquids, or NGLs. The Partnership also provides air compression and water injection services to an oil and gas exploration and production company for use in its oil and gas secondary recovery operations. The Partnership's operations are primarily located in the Mid-Continent and Rocky Mountain regions of the United States. Hiland Partners, LP's midstream assets consist of fourteen natural gas gathering systems with approximately 2,024 miles of gathering pipelines, five natural gas processing plants, seven natural gas treating facilities and three NGL fractionation facilities. The Partnership's compression assets consist of two air compression facilities and a water injection plant. Hiland Holdings GP, LP owns the two percent general partner interest, 1,301,471 common units and 4,080,000 subordinated units in Hiland Partners, LP, and the incentive distribution rights of Hiland Partners, LP. The information contained in this press release is available on the Partnership's website at http://www.hilandpartners.com/. For more information, please contact Matt Harrison, Vice President and CFO, at 580.242.6040. DATASOURCE: Hiland Partners, LP; Hiland Holdings GP, LP CONTACT: Matt Harrison, Vice President and CFO, +1-580-242-6040, for Hiland Partners, LP Web site: http://www.hilandpartners.com/

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