National Program for Inspection of Non-Federal Dams. Lake Harwinton Dam (CT 00367), Lower Housatonic River Basin, Harwinton, Connecticut. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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Lake Harwinton Dam is an earth embankment structure 364 feet in length with a maximum height of 30 feet. An earth dike is located north of the dam and they are separated by approximately 80 feet of natural higher ground. The spillway consists of an unlined flat approach channel from the reservoir, a concrete crest 25 feet long, and a concrete discharge channel 25 feet long with a 15 percent slope. Based on the visual inspection, the dam and dike appear to be in fair condition, except for the downstream slope of the dam which is in poor condition. The project has been rated as poor. Minor cracks were observed in asphalt pavement that traverses the crest of the dam. Settlement of 1 to 2 inches was noted in pavement adjacent to the right side of spillway. The vertical and horizontal alignment of the damdike was good. considerable erosion has occurred on the downstream slope of the dam in the vicinity of the right abutment. Some sloughing of the riprap on the upstream slope near the crest was evident. Seepage including several small springs was noted downstream from the toe of the dam. Heavy brush and small trees were observed on the downstream slope. The dike is generally in overall fair condition.
- Hydrology, Limnology and Potamology
- Civil Engineering