National Program for Inspection of Non-Federal Dams. Fisherville Pond Dam (MA 00577), Blackstone River Basin, Grafton, Massachusetts. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
Pagination or Media Count:
Fisherville Pond Dam is an earthfill dam with a stone masonry, narrow crested spillway. The dam, which was constructed in about 1882, has a total length of 910 feet, including the embankment, spillway, outlet works, and diversion structure. The embankment has a maximum height of 10 feet and is approximately 650 feet long. The 200-foot long spillway is constructed of granite blocks stepped on the downstream side. There is a low level outlet structure at the east end of the spillway. There is also an abandoned gated diversion structure at the west end of the dam on the Blackstone Canal. The following visible signs of distress indicate a potential hazard at the site seepage at the downstream toe of the dam, lack of adequate riprap protection on the upstream face of the dam, thick vegetation and trees growing downstream of the dam, debris scattered on the dam, inoperable slide gates on the Blackstone Canal diversion structure, accumulation of debris in the inlet channel for the outlet and diversion structures, and missing or cracking mortar on the stone masonry training walls at the outlet and diversion structures. The test flood full PMP produces an outflow of 58,800 cfs and would overtop the dam by about 8.2 feet. The spillway can discharge only 22.1 percent of the test flood before the dam is overtopped.
- Hydrology, Limnology and Potamology
- Civil Engineering