Accession Number:

ADA142593

Title:

Connecticut Coastal Basin, Trumbull, Connecticut. Pinewood Lake Dam CT 00080. Phase I Inspection Report. National Dam Inspection Program.

Descriptive Note:

Corporate Author:

CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV

Personal Author(s):

Report Date:

1979-11-01

Pagination or Media Count:

74.0

Abstract:

The project, built in 1870, consists of a stone masonry and earthfill embankment dam, a stone and mortar masonry spillway and an earthfill dike. The dam is approximately 450 feet long, 42 feet wide at the crest and 22 feet above the streambed of Booth Hill Brook. A stone masonry retaining wall forms the downstream face of the dam and is the highest part of the dam at elevation 173.3. The spillway, located 900 or - feet northwest of the dam, is a 185 foot long and 10 foot high stone and mortar masonry weir. The dike, located just to the left of the spillway, is 6 feet wide at the crest, 90 feet long and 3.5 feet high. The outlet facilities are a gated 20 inch ductile iron pipe and a stone masonry gatehouse located at the downstream face of the dam. Based upon the visual inspection at the site and past performance of the dam, the project is judged to be generally in good condition. No evidence of instability in the dam embankment or spillway was observed. There are areas requiring maintenance and monitoring such as seepage at the downstream toe of the dam, erosion of the upstream slope of the dam, spalling of the mortar joints at the spillway and the lack of a low-level outlet pipe at the dam. The spillway capacity with the lake level to the top of dam is 7000 cfs, which includes overflow at the dike, and is equivalent to 77 of the routed test flood outflow.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE