National Program for Inspection of Non-Federal Dams. Little Nugget Lake Dam (MA 00103), French River Basin, Charlton, Massachusetts. Phase I Inspection Report.
Abstract
Little Nugget Lake Dam is a dry-stone masonry and earth dam with a broad crested weir spillway. The existing dam was constructed prior to 1924 with major repairs performed in 1940 and 1967-1968. The dam has a maximum height of 13 feet and is approximately 170 feet long including spillway length. A 30-foot long swale located on the east end of the dam is about 2 feet lower than the remainder of the dam. Most of the downstream slope of the dam is a vertical dry-stone masonry wall. A 3-foot high dike is located several hundred feet west of the dam. The 20.5 foot long spillway is constructed of concrete with 2.5-foot high mortared stone masonry training walls. Generally, Little Nugget Lake Dam is considered to be in poor condition. The following visible signs of distress indicate a potential hazard at the site: bulging of the stone wall on the downstream face of the dam, slight-to-moderate seepage at the downstream toe of the dam, accumulation of debris in the spillway channel; inoperable slide gate; spalling concrete on the spillway and missing concrete on the end of the spillway; lack of adequate riprap protection on the upstream face of the dam; and thick vegetation growing immediately downstream of the dam. An outflow test flood of 1,970 cfs (one-half the probable maximum flood) will overtop the west dike by about 2.2 feet and the main dam by 1.0 foot and the swale by 2.9 feet. The spillways may be inadequate since they can discharge only 15 percent of the test flood before the dam is overtopped.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1978
- Accession Number
- ADA145329
Entities
Organizations
- New England District, U.S. Army Corps of Engineers