A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
National Program for Inspection of Non-Federal Dams. Ashford Lake Dam (CT 00462), Thames River Basin, Ashford, Connecticut. Phase I Inspection
The dam, built in 1949, consists of an earth embankment with a spillway at the right end and a low-level outlet at the central portion. The dam has a maximum impoundment capacity of 715 acre-feet and is approximately 450 feet long, 20 feet wide at the top (elevation 667.8) and 26.5 feet in height above the streambed of the outlet discharge channel at the toe of the dam. The top of the dam is an unpaved road, the downstream slope is covered with brush and the upstream slope has dumped riprap to within 3 feet of the top with a growth of weeds on the remaining portion. The spillway is a 15 foot wide earth and gravel channel with 6 foot high concrete abutment walls, and is located at the right end of the dam. The outlet is located at the central portion of the dam, is gated upstream, and has a rectangular outlet measuring 2.0 feet by 1.5 feet, downstream invert elevation 641.3. Based upon the visual inspection at the site and past performance, the dam appears to be in fair condition. There are signs of settlement of the concrete gate structure and extensive cracking and horizontal movement at the spillway concrete abutment walls. There are also areas requiring maintenance and monitoring such as seepage at the toe of the dam, erosion of the upstream slope above the riprap, potholes and ruts in the top of the dam and depression area on the downstream slope. The spillway capacity with the lake level to the top of the dam is 650 cfs, which is greater than 100% of the routed test flood outflow.
National Program for Inspection of Non-Federal Dams. Ashford Lake Dam (CT 00462), Thames River Basin, Ashford, Connecticut. Phase I Inspection
The dam, built in 1949, consists of an earth embankment with a spillway at the right end and a low-level outlet at the central portion. The dam has a maximum impoundment capacity of 715 acre-feet and is approximately 450 feet long, 20 feet wide at the top (elevation 667.8) and 26.5 feet in height above the streambed of the outlet discharge channel at the toe of the dam. The top of the dam is an unpaved road, the downstream slope is covered with brush and the upstream slope has dumped riprap to within 3 feet of the top with a growth of weeds on the remaining portion. The spillway is a 15 foot wide earth and gravel channel with 6 foot high concrete abutment walls, and is located at the right end of the dam. The outlet is located at the central portion of the dam, is gated upstream, and has a rectangular outlet measuring 2.0 feet by 1.5 feet, downstream invert elevation 641.3. Based upon the visual inspection at the site and past performance, the dam appears to be in fair condition. There are signs of settlement of the concrete gate structure and extensive cracking and horizontal movement at the spillway concrete abutment walls. There are also areas requiring maintenance and monitoring such as seepage at the toe of the dam, erosion of the upstream slope above the riprap, potholes and ruts in the top of the dam and depression area on the downstream slope. The spillway capacity with the lake level to the top of the dam is 650 cfs, which is greater than 100% of the routed test flood outflow.
National Program for Inspection of Non-Federal Dams. Ashford Lake Dam (CT 00462), Thames River Basin, Ashford, Connecticut. Phase I Inspection
1980
85 pages
Report
No indication
English