DENVER -- A $35.6 million bond issue that will fund a Utah power collective's purchase of electricity was tripped up yesterday by a potential wastewater problem.

On Monday, the Utah Associated Municipal Power Systems sold the revenue bond issue, which was rated triple-A with bond insurance from Municipal Bond Investors Assurance Corp. The underlying credit is rated A-minus by Standard & Poor's Corp. Moody's Investors Service and Fitch Investors Service did not rate the underlying issue.

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