Flood Control

Serial Information: Civil Engineering—ASCE, 1984, Vol. 54, Issue 7, Pg. 63-63

Document Type: Feature article


The Hamilton and Riemer reservoirs were constructed by excavating pits below grade to receive flood overflows from adjacent streams. The two reservoirs are part of a 52 sq. mile (135 km²) watershed project, consisting of six reservoirs. The Hamilton and Riemer reservoirs required pit-type excavations because the site did not have river valleys with steep enough walls for conventional gravity dams and reservoirs. Control structures at the two pit reservoirs divert the flows into the pits, preventing downstream flooding. During a storm, excess water flows into the pits. When the storm subsides, water is pumped out of the pit.

Subject Headings: Reservoirs | Stormwater management | Rivers and streams | Floods | Excavation | Gravity dams | Overflow | Watersheds

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