National Program for Inspection of Non-Federal Dams. Linwood Pond Dam (MA 00896), Blackstone River Basin, Northbridge, Massachusetts. Phase I Inspection Program.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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Linwood Pond Dam is a 688 ft. long composite masonry, timber, and earth embankment dam consisting of a 116 ft. long gravity masonry overflow section with a timber sill and sloping timber upstream face, a 282 ft. long earth embankment to the right of the overflow section and a 290 ft. long earth embankment to the left of the overflow section. The test flood of 17,600 cfs overtops the dams earth embankments by 3.4 ft. The spillway can pass 3,550 cfs or about 20 percent of the test flood without overtopping the embankments. The dam is judged to be in generally fair condition. Water was flowing to a depth of about 7 in. over the crest of the spillway at the time of the inspection, so it was not possible to observe the condition of the downstream face or the crest of the overflow section. Nevertheless, the water appeared to be flowing uniformly with no evidence of turbulence or missing or eroded elements. Seepage was noted below the right embankment and through the berm between the reservoir rim and an abandoned gravel pit located to the right of the right embankment. Minor erosion was noted on both embankments and there is brush and tree growth on both the dike and the right embankment. The training walls of the spillway are in need of repair. The low level outlet is reported to be operative.
- Hydrology, Limnology and Potamology
- Civil Engineering