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. Spectacle Swamp Dam (CT 00476), Connecticut Coastal Basin, Wilton, Connecticut. Phase I Inspection Report
The 250-foot-long, 21-foot-high homogeneous earthfill embankment is 12 feet wide at the top and has 3:1 upstream and downstream slopes. Riprap has been provided on the upstream slope to an elevation 2 feet above the wildlife pool surface. The principal spillway is composed of a reinforced concrete drop inlet structure and a 30-inch-diameter conduit through the dam. The crest of the drop inlet riser is at elevation 577.0 NGVD and has a total crest length of 15 feet. There is an ungated low-level outlet on the upstream wall of the riser. This 1 ft. - 10 in. by 1 ft. - 4 in. outlet has an open intake which may be closed, using stoplogs, thus diverting the flow over the weirs on the sides of the intake. The rock cut emergency spillway on the right abutment is 15 feet wide and approximately 245 feet long with a crest elevation of 578.0. The visual inspection of the dam indicated that the structure is in good condition. No indications of seepage through the dam were noted nor was seepage observed at the abutments or along the concrete spillway outlet pipe. There was no discharge from the 6-inch-diameter toe drain outlets during the inspection. The test flood outflow is approximately 1,240 cfs; and the combined capacity of the spillways, with the water surface at the top of the dam, is 1,600 cfs or 129 percent of the routed test flood outflow.
National Program for Inspection of Non-Federal Dams. Spectacle Swamp Dam (CT 00476), Connecticut Coastal Basin, Wilton, Connecticut. Phase I Inspection Report
The 250-foot-long, 21-foot-high homogeneous earthfill embankment is 12 feet wide at the top and has 3:1 upstream and downstream slopes. Riprap has been provided on the upstream slope to an elevation 2 feet above the wildlife pool surface. The principal spillway is composed of a reinforced concrete drop inlet structure and a 30-inch-diameter conduit through the dam. The crest of the drop inlet riser is at elevation 577.0 NGVD and has a total crest length of 15 feet. There is an ungated low-level outlet on the upstream wall of the riser. This 1 ft. - 10 in. by 1 ft. - 4 in. outlet has an open intake which may be closed, using stoplogs, thus diverting the flow over the weirs on the sides of the intake. The rock cut emergency spillway on the right abutment is 15 feet wide and approximately 245 feet long with a crest elevation of 578.0. The visual inspection of the dam indicated that the structure is in good condition. No indications of seepage through the dam were noted nor was seepage observed at the abutments or along the concrete spillway outlet pipe. There was no discharge from the 6-inch-diameter toe drain outlets during the inspection. The test flood outflow is approximately 1,240 cfs; and the combined capacity of the spillways, with the water surface at the top of the dam, is 1,600 cfs or 129 percent of the routed test flood outflow.
National Program for Inspection of Non-Federal Dams. Spectacle Swamp Dam (CT 00476), Connecticut Coastal Basin, Wilton, Connecticut. Phase I Inspection Report
1981
104 pages
Report
Keine Angabe
Englisch