National Program for Inspection of Non-Federal Dams. Wyassup Lake Dam (CT 00570), Pawcatuck River Basin, North Stonington, Connecticut. Phase I Inspection Report.
Abstract
The dam at Wyassup Lake is an earth embankment approximately 495 feet in length, including a spillway crest length of 20 feet. The maximum height of the dam is 15 feet. The outlet works for the dam consists of an inlet headwall structure, a 24-inch diameter pipe through the embankment to a 6 feet square concrete manhole control structure midway through the embankment and a 24-inch diameter discharge pipe that exits in the downstream sidewall of the spillway overflow. Flows are controlled by a manually operated 24-inch sluice gate operated from the crest of the dam. The overflow spillway is a reinforced concrete structure with a weir length equal to 20 feet. As a result of the visual inspection, the dam is judged to be in FAIR condition. Deficiencies observed include: an inadequate spillway capacity to pass the test flood; lack of complete riprap protection along the upstream slope, particularly at abutment areas; depressions noted in the crest of the dam that could be the result of embankment movement; and the partially inoperative outlet works gate. The maximum spillway discharge of 300 CFS represents 32 percent of the total test flood outflow.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1980
- Accession Number
- ADA144627
Entities
Organizations
- New England District, U.S. Army Corps of Engineers