Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
National Program for Inspection of Non-Federal Dams. Lower Bolton Lake Dam (CT 00509), Thames River Basin, Bolton, Connecticut. Phase I Inspection Report
Lower Bolton Lake Dam is an earth embankment 880 ft. long with a maximum height of 18.5 ft., and a concrete spillway 200 ft. long at the left abutment. The outlet is a 15 in. dia. cast iron pipe at stream level with a valve on the upstream end. Maximum storage capacity is about 2,325 acre-ft. Upper Bolton Lake Dam about 2/3 mi. upstream is generally similar. Both lakes, which have a normal difference in elevation of 7 ft., are used for recreational purposes. The total drainage area is about 3.9 sq. mi., of which about 3.1 sq. mi. drains into Upper Bolton Lake. The nineteenth century dam was breached in two places during a hurricane in 1938. Reconstructed in 1940-41 by the W.P.A., the dam failed again in 1941. During the next three years, a series of repair and reconstruction operations were undertaken by various contractors. No plans were recovered for any of this work. The dam is in fair condition, based on visual inspection. The spillway is adequate to pass the test flood without overtopping the dam. Cracks in the spillway concrete slabs were noted. The downstream slope and discharge channel are considerably overgrown. The 15 in. dia. outlet pipe is too small to have any significant effect during a flood event.
National Program for Inspection of Non-Federal Dams. Lower Bolton Lake Dam (CT 00509), Thames River Basin, Bolton, Connecticut. Phase I Inspection Report
Lower Bolton Lake Dam is an earth embankment 880 ft. long with a maximum height of 18.5 ft., and a concrete spillway 200 ft. long at the left abutment. The outlet is a 15 in. dia. cast iron pipe at stream level with a valve on the upstream end. Maximum storage capacity is about 2,325 acre-ft. Upper Bolton Lake Dam about 2/3 mi. upstream is generally similar. Both lakes, which have a normal difference in elevation of 7 ft., are used for recreational purposes. The total drainage area is about 3.9 sq. mi., of which about 3.1 sq. mi. drains into Upper Bolton Lake. The nineteenth century dam was breached in two places during a hurricane in 1938. Reconstructed in 1940-41 by the W.P.A., the dam failed again in 1941. During the next three years, a series of repair and reconstruction operations were undertaken by various contractors. No plans were recovered for any of this work. The dam is in fair condition, based on visual inspection. The spillway is adequate to pass the test flood without overtopping the dam. Cracks in the spillway concrete slabs were noted. The downstream slope and discharge channel are considerably overgrown. The 15 in. dia. outlet pipe is too small to have any significant effect during a flood event.
National Program for Inspection of Non-Federal Dams. Lower Bolton Lake Dam (CT 00509), Thames River Basin, Bolton, Connecticut. Phase I Inspection Report
1978
114 pages
Report
Keine Angabe
Englisch