Accession Number:

ADA142687

Title:

National Program for Inspection of Non-Federal Dams. Rockwood Lake Dam (CT 00046), Connecticut Western Coastal Area, Greenwich, Connecticut. Phase I Inspection Report.

Descriptive Note:

Inspection rept.

Corporate Author:

CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV

Personal Author(s):

Report Date:

1978-09-01

Pagination or Media Count:

58.0

Abstract:

Rockwood Lake Dam is an earth embankment reported to have a concrete core wall, built in 1893. The dam section is 1,200 feet long with a maximum height of 36 feet. The top of the dam is 12 feet wide. Riprap is in place on the upstream face. A concrete spillway with a riprapped apron is 80 feet long, with 2-foot wide crest, is located approximately in the center of the dam. The visual inspection indicates that the Rockwood Lake Dam is in poor condition. The major concerns regarding the longterm safety of the dam with respect to soils and geology are the apparent seepage areas on the downstream face of the dam along the toe and particularly in the vicinity of Station 425 and 825. The maximum spillway capacity at the top of the dam is approximately equal to the discharge rate of the test flood. Therefore, the test flood can be passed by the spillway with minimum overtopping estimated to be 0.1 feet.

Descriptors:

• *EARTH DAMS
• DEFICIENCIES
• SAFETY
• VISUAL INSPECTION
• CONNECTICUT

Subject Categories:

• Hydrology, Limnology and Potamology
• Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE