National Program for Inspection of Non-Federal Dams. Simonds Pond Dam (MA 00874), Merrimack River Basin, Leominster, Massachusetts. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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Simonds Pond is approximately 365 feet long and has a hydraulic height of 26 feet. The storage capacity is 86.5 acre-feet. The dam has a concrete cap and stone abutments. The emergency spillway is 48 feet long and occupies the center portion of the dam. As a result of the visual inspection and a review of available data, Simonds Pond Dam is considered to be in poor condition. Major concerns are significant seepage at the toe of the dam missing mortar and poor condition of the joints of the spillway extensive spalling and cracking of the concrete cap on the top of the dam and spillway deterioration of the spillway apron extensive spalling of the concrete gatehouse foundation and inadequate spillway capacity. The test flood inflow was estimated to be 2,500 cfs and resulted in an outflow discharge estimated to be 2,460 cfs, which would overtop the dam by approximately 1.3 feet. The maximum spillway capacity with the water level at the dam crest was estimated to be 700 cfs, which is approximately 28 percent of the test flood discharge.
- Hydrology, Limnology and Potamology
- Civil Engineering