National Program for Inspection of Non-Federal Dams. Farm Brook Site 2B Dam (CT 01547), Connecticut Coastal Basin, Hamden, Connecticut. Phase I Inspection Report

摘要

Being one of two structures impounding water at the Farm Brook Site 2 Reservoir (See Farm Brook Site 2A Dam CT-01546 Report) the Farm Brook Site 2B Dam consists of an earth embankment approximately 1,000 ft. long with a top width of 14 ft. and a maximum height of 28 ft. The low level outlet for the project is the principal spillway which consists of a three-stage reinforced concrete intake riser, a 30-inch reinforced concrete pipe and a 16 ft. long impact basin. In addition to the low-level outlet, there is a 90 ft. wide, grassed trapezoidal channel at the east end of the dam serving as the emergency spillway. Based on the visual inspection and review of available plans and reports, Farm Brook Site 2B Dam is judged to be in good condition, with the exception of the seepage observed flowing from the 8-in. outlet at the west side of the impact basin. Since the reservoir level was very low at the time of inspection, any possible embankment seepage at the dam could not be ascertained. With the water level at the top of the site 2B Dam, the maximum spillway capacity is 3800 cfs which is 205% of its routed outflow 1850 cfs. The storage capacity of the reservoir at the top of the dam is 1190 ac. ft.