National Dam Safety Program. Lake Garrison Dam (NJ00778), Maurice River Basin, Reed Branch of Still Run, Gloucester Counter, New Jersey. Phase I Inspection Report.
NEW JERSEY DEPT OF ENVIRONMENTAL PROTECTION TRENTON DIV OF WATER RESOURCES
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The dam consists of an earth embankment with a spillway structure located near the center. The spillway structure consists of a horseshoe-shaped interlocking steel sheet pile weir located on the upstream side of the embankment with primary and secondary spillway crests. The outlet works consists of two gated 2 x 3 sluices which are located at the right and left ends of the interlocking steel sheet piling forming the spillway weir. The upstream face of the dam is formed by a treated timber bulkhead. The top width of embankment is 18 feet and the downstream slope is approximately 4 horizontal to 1 vertical. Based on visual inspection, available records, calculations and past operational performance, Lake Garrison Dam, initially listed as a high hazard potential structure, but reduced to a significant hazard potential structure as a result of this inspection, is judged to be in good overall condition. The dams spillway is considered inadequate because a flow equivalent to 19 percent of the Spillway Design Flood SDF would cause the dam to be overtopped.
- Hydrology, Limnology and Potamology
- Civil Engineering