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Reservoir Outlet Extended Above Silt to Prevent Clogging

by Earl O. Bengry, (F.ASCE), Asst. Chf. Engr.; United Water Conservation Dist., Santa Paula, Calif.,
Wayne T. Caltrider, Constr. Engr.; United Water Conservation Dist., Santa Paula, Calif.,


Serial Information: Civil Engineering—ASCE, 1978, Vol. 48, Issue 9, Pg. 81-83


Document Type: Feature article

Abstract:

Accumulation of silt in an on-stream water storage reservoir almost completely buried the concrete tower originally provided as an outlet intake shaft for releasing stored water through the outlet facilities. Reinforced concrete pipe units were assembled and prestressed using a posttension process to produce a chimney 6 1/4 ft in diameter and 42-ft (12.8-m) long. Buoyancy and hydrostatic principles were utilized to position the chimney vertically as an extension to the almost buried original inlet structure. Careful design and execution permitted project completion in-house, using a small work force without heavy construction equipment.

Subject Headings: Water storage | Water intakes | Concrete pipes | Soil water | Silt | Reservoirs | Reinforced concrete

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