Accession Number:

ADA142711

Title:

Southwestern Coastal Basin, Greenwich, Connecticut. American Felt Dam CT 00043. Phase 1 Inspection Report. National Dam Inspection Program.

Descriptive Note:

Corporate Author:

CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV

Personal Author(s):

Report Date:

1980-02-01

Pagination or Media Count:

112.0

Abstract:

This dam is a concrete rubble and masonry construction with earth embankments on each side. The dam is approximately 208 feet long, 37 feet high and has to top width of 13 feet. It was constructed about 1867 and presently serves only an aesthetic function. Based on the visual inspection and past operational performance, the dam is judged to be in fair condition. Seepage was noted on the downstream face. Both faces are vegetated and in need of repointing, and a few stones are missing from the dam at the ends of the spillway. The test flood for this dam is 12 the Probable Maximum Flood PMF. The test flood has an outflow discharge equal to 13000 cfs and will overtop the dam by 7.4 feet in a stillwater condition. The maximum outflow capacity of the spillway under stillwater conditions is 1335 cfs which is 10 percent of the test flood. It is recommended that the following items be studied further The leakage of the 60 inch outlet pipe sluice gate seepage on the downstream face the toe the upstream face and the spillway capacity.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE