National Program for Inspection of Non-Federal Dams. Goss Brook Dam (CT 00465), Thames River Basin, Ashford, Connecticut. Phase I Inspection Report.
Abstract
The dam completed in 1963 to impound a recreation pond, is an earth embankment approximately 650 feet in length with an emergency spillway at its left end. It is approximately 40.5 feet in height and is capable of impounding 600 acre-feet of water. The principal spillway is a drop inlet type structure consisting of a reinforced concrete riser with a 42 inch diameter reinforced concrete outlet pipe which discharges to the natural streambed of Goss Brook at the downstream toe of the embankment. A 30-inch diameter low-level intake and sluice gate are also included in the principal spillway structure. The grass-bottomed emergency spillway channel is cut into natural ground at the left end of the dam and has a crest length of 120 feet. The upstream slope of the embankment includes an 8 foot wide berm at the normal pool elevation and is protected by riprap to 2 feet above the berm. The top and slopes of the dam are grass covered, with a filter blanket at the toe of the downstream slope. Based upon the visual inspection and past performance, the project is judged to be in fair condition. There are items which require maintenance or evaluation, such as possible slight tilting of the concrete principal spillway structure and potential for erosion of the emergency spillway embankment. The combined spillway capacity with the pond level to the top of the dam is 4,700 cfs, which is equivalent to 150% of the routed test flood outflow.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA144723
Entities
Organizations
- New England District, U.S. Army Corps of Engineers