U.S. awards $1.2 million for 4.95-MW Deer Creek spillway rehab

The Bureau of Reclamation awarded a $1.2 million contract Jan. 16 to Moltz Constructors Inc. to make improvements to the spillway of 4.95-MW Deer Creek Dam, part of the Provo River project in Utah.

Moltz Constructors, of Cody, Wyo., will perform tasks during the second phase of the federal government’s multi-phase Safety of Dams Modification project at Deer Creek Dam. In that phase, the contractor will remove deteriorating concrete sections and install reinforced concrete, grouted anchors, and dowels in spillway chute floor slabs and walls. It also will install PVC plastic water stops at concrete joints.

BuRec began the first phase of work in 2003 in a program to modify the 235-foot-tall, 1,300-foot-long zoned earthfill dam and spillway structure to enable it to withstand a large seismic event. BuRec and Utah’s Department of Transportation are working on that initial phase, a highway improvement project in Provo Canyon around the dam. That part of the project includes construction of a bridge spanning the spillway and realignment of the highway that previously crossed the top of the dam.

Phase III work will involve the upper portion of the spillway control structure, and raising the crest of the dam.

BuRec anticipates finishing highway improvement work in early 2008, and all dam safety work by 2010.

Deer Creek Dam is the main feature of Provo River project, which BuRec built for the Provo River Water Users Association to provide agricultural, municipal, and industrial water. Its reservoir impounds 153,000 acre-feet.

The Deer Creek hydro plant was commissioned in 1958. It houses two turbine-generators that generate electricity to replace energy lost at other power plants through storage and diversion of water for irrigation during the winter season.

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