PrimeWest Energy Trust TSX: PWI.UN, PWX, PWI.DB.A, PWI.DB.B, PWI.DB.C NYSE: PWI

CALGARY, ALBERTA--(Marketwire - Aug. 8, 2007) - PrimeWest Energy Trust (TSX:PWI.UN) (TSX:PWX) (TSX:PWI.DB.A) (TSX:PWI.DB.B) (TSX:PWI.DB.C) (NYSE:PWI) (PrimeWest or the Trust) announces that the distribution payable September 14th, 2007 will be $0.25 per Trust Unit. The ex-distribution date is August 20th, 2007 and the record date is August 22nd, 2007.

Using a Canadian to U.S. dollar exchange rate of 0.95, the distribution amount is approximately US$0.2375 per Trust Unit. The actual U.S. dollar equivalent distribution will be based upon the U.S./Canadian dollar exchange rate in effect on the payment date, net of applicable Canadian withholding taxes.

PrimeWest is a Calgary-based conventional oil and gas royalty trust that actively acquires, develops, produces and sells natural gas, crude oil and natural gas liquids for the generation of monthly cash distributions to Unitholders. Trust Units of PrimeWest are traded on the Toronto Stock Exchange (TSX) under the symbol "PWI.UN" and on the New York Stock Exchange under the symbol "PWI". Exchangeable Shares of PrimeWest Energy Inc. are listed on the TSX under the symbol "PWX". Series I Convertible Debentures of PrimeWest trade on the TSX under the symbol "PWI.DB.A", Series II Convertible Debentures trade under the symbol "PWI.DB.B" and Series III Convertible Debentures trade under the symbol "PWI.DB.C".

To learn more about PrimeWest, please visit our website at www.primewestenergy.com.