National Program for Inspection of Non-Federal Dams. Westfield Reservoir Dam (MA 00734) Connecticut River Basin, Montgomery, Massachusetts. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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Westfield Reservoir Dam is an earthen embankment structure about 350 feet long and 40 feet high. It has an uncontrolled overflow spillway located on the left east abutment and a 24-inch diameter cast-iron pipe outlet conduit which passes beneath the dam and which is valve controlled at the outlet end. Based on the visual inspection, the dam is judged to be in air condition. The following deficiencies were observed at the dam minor but widespread slumping on the downstream slope an animal burrow on the downstream slope large trees near both abutments a soft, wet area along the right bank of the downstream channel a small sinkhole on the right side of the spillway discharge channel lack of vegetation on the crest of the dam inoperable valves on the downstream end of the outlet conduit and no valve or other means of regulating or shutting off flow at the intake end of the outlet conduit. With the stoplog in place, the spillway capacity of Westfield Reservoir Dam is 707 cfs, which is about 15 percent of the routed test flood outflow of 4670 cfs. With the stoplog removed, the spillway capacity is about 994 cfs, which is about 21 percent of the routed test flood outflow. The test flood would cause the dam to be overtopped by about 3.5 feet.
- Hydrology, Limnology and Potamology
- Civil Engineering