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Gabions, Perforated Pipe and Gravel Serve as Fish Screens

by Reuben E. Schmidt, Asst. Engr. and Asst. Mgr.; Merced Irrigation Dist., Merced, Calif.,
Kenneth R. McSwain, (F.ASCE), Chf. Engr. and Mgr.; Merced Irrigation Dist., Merced, Calif.,


Serial Information: Civil Engineering—ASCE, 1976, Vol. 46, Issue 5, Pg. 73-73


Document Type: Feature article

Abstract:

A type of structure to prevent juvenile salmon from diverting to irrigation ditches has been developed on the Merced River in central California. It was built after cost considerations and the effectiveness of traditional fish screen devices had been evaluated. The basic design was made after experimenting with scaled-down prototypes. The principal materials used are perforated pipe, gabions, gravel and cobbles, a steel slide gate and a headwall. No mechanically powered equipment is involved. After five years' use operational costs have been minimal; it may be necessary in the future to replace the gravels.

Subject Headings: Gravels | Steel pipes | Pipe materials | Fish and fishery management | Benefit cost ratios | Sliding effects | Rivers and streams

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