Concrete Products

FEB 2018

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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70 • February 2018 www.concreteproducts.com FEATURE PRECAST As La Grande Reservoir owner and operator, the City of La Grande, Ore., looked to construct a fish passage at the Upper Grande Ronde River Watershed in Union County. The structure would address seven barriers to 14-plus square miles of watershed dating to the Beaver Creek Dam construction in 1915, when contracts lacked provisions for steelhead access to spawning grounds. The city hired Anderson Perry & Associates to design improve- ments to in-stream habitat and restore fish passage over existing barriers in Beaver Creek and two tributaries, through installation of a series of vortex weirs, streambed simulation material, grade control structures, boulders, and wood habitat structures. The design also included a 500-ft. vortex weir fish ladder to provide passage over the 30-ft. high dam. The project was awarded to Steve Lindley Contract- ing, which enlisted Oldcastle Precast Nampa to fabricate specially engineered concrete structures. Work included completion of the required survey for various small intake sites; design drawings for improvements at all diver - sion locations; draft plan review with city staff; and, preparation of final documents and technical specifications to install the required improvements. In addition, Anderson Perry completed a formal Wet- land Delineation Report and Biological Assessment, while securing fill and removal permits and providing agency consultation. Throughout design and construction, the project team conferred with the U.S. Forest Service, which owns the land bearing the La Grande Reservoir. RIGHT OF PASSAGE Oldcastle Precast helps restore trout access to prized watershed

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