EPHRATA – Grant County Public Utility District commissioners are mulling over a proposed 10-year, $15 million contract with an engineering firm to ensure the safety and stability of Wanapum Dam near Mattawa. In 2021, internal erosion was identified as a potential cause for failure, and the contractor would analyze needed repairs at the embankment built in the early 1960s. Commissioners are scheduled to vote on the proposed contract at their Aug. 23 meeting at Grant PUD’s Ephrata Headquarters.
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