National Program for Inspection of Non-Federal Dams. Lake Gaillard Dam (CT 00387), Branford River Basin, North Branford, Connecticut. Phase I Inspection Report.
Abstract
The Lake Gaillard Dam consists of a gravity-concrete structure that is 1,050 feet long and is covered with an earth embankment on the downstream side. There is an earth dike with an emergency spillway on the east side of the lake. Based on visual inspection, records available at the site and past operational performance, the facility is judged to be in good condition. A review of the engineering data available reveals that there are areas of concern which must be corrected in order to assure the safety of the facility. Seepage discharges in the vicinity of the lower valve chamber of the main dam and the downstream earth slopes of the east dike should be further investigated to determine their origin and monitored to determine any change. The project will not pass the Probable Maximum Flood (PMF) (recommended spillway design flood) without overtopping the dam; however, the spillway capacity is not judged seriously inadequate because the water will flow 0.9 feet over a concrete non-overflow section of the dam. The spillway capacity is only 42.2 percent of the PMF (up to the top of the dam, elevation 195).
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1978
- Accession Number
- ADA144577
Entities
Organizations
- New England District, U.S. Army Corps of Engineers