A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
National Program for Inspection of Non-Federal Dams. Obed Heights Reservoir Dam (CT 00414), Connecticut River Basin, Old Saybrook, Connecticut. Phase I Inspection Report
The project, built in the 1880's, is approximately 465 feet in length including a 27 foot long masonry spillway. The dam is 22 feet in height and, with the reservoir level to the top of the dam, impounds approximately 250 acre-feet of water. The height of the embankment above the spillway crest varies from 3.3 feet to 4.0 feet. The embankment, which reportedly contains a concrete corewall, has a top width a approximately 10 feet, and upstream slope inclination of 2 horizontal to 1 vertical, and a downstream slope inclination varying between 2 horizontal to 1 vertical and 1 horizontal to 1 vertical. The spillway is a broad-crested weir with a crest length of 27 feet and is located at the left end of the dam. Reportedly, the outlet works consists of a submerged intake structure and an 8 inch diameter water supply main through the dam with outlet valves located approximately 1000 feet from the dam. Based upon the visual inspection at the site and past performance, the project is judged to be in poor condition. There is seepage, which requires monitoring; areas such as the dense vegetation of the dam, the irregular shape of the embankment, erosion of the upstream slope, and deterioration of the masonry spillway, which require maintenance; and the questionable condition of the low-level outlet works which requires further investigation. The spillway capacity, with the reservoir level to the low point of the top of the dam, is 480 cfs, which is equivalent to 270% of the routed test flood outflow.
National Program for Inspection of Non-Federal Dams. Obed Heights Reservoir Dam (CT 00414), Connecticut River Basin, Old Saybrook, Connecticut. Phase I Inspection Report
The project, built in the 1880's, is approximately 465 feet in length including a 27 foot long masonry spillway. The dam is 22 feet in height and, with the reservoir level to the top of the dam, impounds approximately 250 acre-feet of water. The height of the embankment above the spillway crest varies from 3.3 feet to 4.0 feet. The embankment, which reportedly contains a concrete corewall, has a top width a approximately 10 feet, and upstream slope inclination of 2 horizontal to 1 vertical, and a downstream slope inclination varying between 2 horizontal to 1 vertical and 1 horizontal to 1 vertical. The spillway is a broad-crested weir with a crest length of 27 feet and is located at the left end of the dam. Reportedly, the outlet works consists of a submerged intake structure and an 8 inch diameter water supply main through the dam with outlet valves located approximately 1000 feet from the dam. Based upon the visual inspection at the site and past performance, the project is judged to be in poor condition. There is seepage, which requires monitoring; areas such as the dense vegetation of the dam, the irregular shape of the embankment, erosion of the upstream slope, and deterioration of the masonry spillway, which require maintenance; and the questionable condition of the low-level outlet works which requires further investigation. The spillway capacity, with the reservoir level to the low point of the top of the dam, is 480 cfs, which is equivalent to 270% of the routed test flood outflow.
National Program for Inspection of Non-Federal Dams. Obed Heights Reservoir Dam (CT 00414), Connecticut River Basin, Old Saybrook, Connecticut. Phase I Inspection Report
1980
64 pages
Report
No indication
English