National Program for Inspection of Non-Federal Dams. Plainville Reservoir Dam (CT 00259), Quinnipiac River Basin, Southington, Connecticut. Phase I Inspection Report.
Abstract
Plainville Reservoir Dam is an earthen embankment dam with a maximum height o 17 feet and a length of 688 feet. A concrete spillway section, 15 feet wide, is located near the left abutment. The upstream face has a slope of 1.5:1, and is protected by riprap. The downstream face has a slope of 1.5:1. There are two 6-inch diameter blowoffs located adjacent to the two gatehouse structures located downstream of the dam. Plainville Reservoir has a storage volume of 528 acre-feet; the size classification is thus small. In general, the dam was judged to be in fair condition. The vertical and horizontal alignment is good; however, a slight dip in the crest was noted in the vicinity of the downstream gatehouse. Several windows were observed in the upstream riprap, which ends about 2 feet below the crest of the dam. Some small seeps were observed near the downstream slope (right side of the dam). The concrete spillway and training walls were in good condition. Some flow of water was observed passing below the spillway and flowing out the spillway channel. The spillway is not adequate to pass the 0.5 PMF test flood outflow without overtopping the dam. The test flood would overtop the dam by about 0.2 feet. The spillway pass about 46 percent of the test flood outflow without overtopping the dam
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1980
- Accession Number
- ADA144280
Entities
Organizations
- New England District, U.S. Army Corps of Engineers