National Program for Inspection of Non-Federal Dams. Gregg Lake Dam (NH 00056), NHWRB-9.03, Contoocook River Basin, Antrim, New Hampshire. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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The Gregg Lake Dam is a dry-laid stone masonry and concrete structure with earthfill embankments. The dam is approximately 9 ft. high, and about 210 ft. long including earth embankments. The dam has three stop log controlled spillways totaling approximately 21 ft. in length, a low level gated outlet, and a sluice gate outlet. Based on the visual inspection, the Gregg Lake Dam is assessed to be in fair condition. The size is intermediate with a significant hazard potential. Major concerns include apparent movement of the stone masonry and potential overtopping and erosion of low areas in the earth embankments. Keywords include Inspection Dam safety Contoocook River Basin Antrim, New Hampshire and Gregg Lake Outlet.
- Civil Engineering