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. Onota Lake Dam (MA 00016), Housatonic River Basin, Pittsfield, Massachusetts. Phase I Inspection Report
Onota Lake Dam consists of two adjoining structures: a 160 feet long stone masonry and concrete Main Dam, which creates Onota Lake, and a 375 feet long stone masonry, concrete and earthfill dam, which retains a small holding pond commonly referred to as the Canal. The maximum height of both dams is about 17.5 feet. Both dams have drop spillways which are 40 and 30 feet long, respectively, with 2.5 feet of freeboard. The Lake and Canal are interconnected by means of an uncontrolled 42 inch diameter pipe. A concrete intake structure and a 5 foot diameter steel outlet pipe are located at one end of the Canal. Discharges from the spillways and low level outlet flow into Onota Brook, a tributary of the Housatonic River. Phase I investigation of Onota Lake Dam does not indicate conditions which would constitute an immediate hazard to human life or property. Based on engineering judgment and the performance of the dams and the outlet works, the project appears to be in fair condition. The project, however, does have inadequacies and deficiencies which, if not remedied, have the potential for developing into hazardous conditions. The Test Flood was routed through the lake, using a computer routing technique, and resulted in the dam being overtopped by a maximum of 5.4 feet with a peak outflow discharge of 7388 cfs. The spillway capacity is only 6% of the Test Flood outflow and is considered seriously inadequate from a hydrologic and hydraulic viewpoint.
National Program for Inspection of Non-Federal Dams. Onota Lake Dam (MA 00016), Housatonic River Basin, Pittsfield, Massachusetts. Phase I Inspection Report
Onota Lake Dam consists of two adjoining structures: a 160 feet long stone masonry and concrete Main Dam, which creates Onota Lake, and a 375 feet long stone masonry, concrete and earthfill dam, which retains a small holding pond commonly referred to as the Canal. The maximum height of both dams is about 17.5 feet. Both dams have drop spillways which are 40 and 30 feet long, respectively, with 2.5 feet of freeboard. The Lake and Canal are interconnected by means of an uncontrolled 42 inch diameter pipe. A concrete intake structure and a 5 foot diameter steel outlet pipe are located at one end of the Canal. Discharges from the spillways and low level outlet flow into Onota Brook, a tributary of the Housatonic River. Phase I investigation of Onota Lake Dam does not indicate conditions which would constitute an immediate hazard to human life or property. Based on engineering judgment and the performance of the dams and the outlet works, the project appears to be in fair condition. The project, however, does have inadequacies and deficiencies which, if not remedied, have the potential for developing into hazardous conditions. The Test Flood was routed through the lake, using a computer routing technique, and resulted in the dam being overtopped by a maximum of 5.4 feet with a peak outflow discharge of 7388 cfs. The spillway capacity is only 6% of the Test Flood outflow and is considered seriously inadequate from a hydrologic and hydraulic viewpoint.
National Program for Inspection of Non-Federal Dams. Onota Lake Dam (MA 00016), Housatonic River Basin, Pittsfield, Massachusetts. Phase I Inspection Report
1978
103 pages
Report
Keine Angabe
Englisch