Accession Number:

ADA143518

Title:

National Program for Inspection of Non-Federal Dams. Hallmere Reservoir Dam (CT 00249), Connecticut River Basin, Berlin, Connecticut. Phase I Inspection Report.

Descriptive Note:

Corporate Author:

CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV

Personal Author(s):

Report Date:

1979-06-01

Pagination or Media Count:

84.0

Abstract:

Hallmere Reservoir Dam is an earthfill embankment about 570 ft. long and 45 ft. high. It has a concrete core and a riprap covered upstream face. It was constructed in 1896-97 for purposes of water supply. A 30 ft. wide masonry waste-way with s ill and flashboards serves as the spillway. The only regulated outlet is a 20 in. dia. concrete pipe. The maximum storage capacity of the reservoir to top of dam is about 585 acre ft. and the drainage area is about 1 sq. mi. The dam appears to be in fair condition. Brush and tree growth has begun to intrude on the slopes and crest of the embankment. Seepage was noted at the downstream toe of the dam. Animal burrows and missing riprap was apparent on the upstream slope of the embankment. The test flood inflow is 3200 cfs. The routed test flood outflow 2,900 cfs overtops the dam by 0.7 ft. The spillway is adequate to pass an outflow corresponding to about 51 percent of the routed test flood outflow but the spillway and discharge channel walls would be overtopped by about 5 ft.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE