National Program for Inspection of Non-Federal Dams. Williams Pond Dam (CT 00900), Connecticut River Basin, Glastonbury, Connecticut. Phase I Inspection Report.
Abstract
Williams Pond Dam is a stone masonry/concrete and earth embankment structure that is 17.1 feet high and approximately 190 feet long. The downstream face is a vertical stone masonry wall which has been surfaced with concrete in the vicinity of the spillway and the upstream face is earth on a 2:1 slope. A two foot high by 1.5 foot wide concrete wall runs most of the length of the top of the dam. Near the south side of the dam is the main spillway which consists of a concrete weir that is 8 feet long. Concrete spillway abutments rise 4 feet above the spillway and atop the south abutment is a low-level discharge gate that controls a 2'X2' conduit through the base of the dam. Operating the gate requires the use of a portable hydraulic jack and will lower the pond in approximately four hours. On the north side of the pond is a semicircular auxiliary spillway with a total weir arclength of 53 feet that overflows into an 84 inch reinforced concrete pipe which discharges into Hubbard Brook. The assessment of the dam is based on the available engineering data, the visual inspection and hydraulic/hydrologic computations. the dam is judged to be in FAIR condition with several areas that require attention. These areas include a low area of the crest at the south end of the dam that would result in premature overtopping of the dam, missing mortar from the downstream masonry, a rectangular opening through the concrete wall along the top of the dam as well as spalling over most of the concrete wall and spillway abutments, brush growing along the upstream side of the wall, debris in the downstream channel and overgrowth and spalling on the auxiliary spillway. The test flood outflow would overtop the dam by 1.5 feet.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1981
- Accession Number
- ADA144587
Entities
Organizations
- New England District, U.S. Army Corps of Engineers