National Dam Safety Program. Lake Welch Dam (Inventory Number NY283), Hudson River Basin, Rockland County, New York. Phase I Inspection Report,
NEW YORK STATE DEPT OF ENVIRONMENTAL CONSERVATION ALBANY
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Lake Welch Dam, formerly known as Beaver Pond Dam is located on the east side of Lake Welch. The maximum height of dam is 32 feet. The dam is 788 feet long and consists of a concrete gravity section 563 feet and an earth embankment right of gravity section with a central concrete core wall 225 feet. The concrete dam, supported on a rock foundation consists of 18 monoliths which are anchored to the rock by 25-ton post-tensioned rock anchors. Examination of the available documents and visual inspection of the Lake Welch Dam did not reveal conditions which constitute a hazard to human life or property. Using the Corps of Engineers screening criteria for review of spillway adequacy, it has been determined that concrete gravity section of the dam would be overtopped for all storms exceeding approximately 12 percent of the Probable Maximum Flood PMF.
- Civil Engineering