National Program for Inspection of Non-Federal Dams, Kensington Dam (CT-00250), Lower Connecticut River Basin, Berlin, Connecticut. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
Pagination or Media Count:
The dam is a 205 foot long concrete gravity structure keyed into rock at both abutments. The top of the dam is typically 5.5 feet wide and approximately 25 feet above the bed of the Mattabesset River. The upstream face of the dam by visual inspection is vertical, while the downstream face is battered on an inclination of approximately 2 horizontal to 1 vertical based upon field measurements. The spillway is a concrete, broad crested compound weir of trapezoidal cross-section with a shallow bucket dissipator apron. The spillway crest is 3.0 feet below the top of the dam. There are two low level gates on the upstream face of the dam. One gate feeds the 42 inch cast iron low level outlet, and is operable. The other gate feeds a pipeline which was used to provide water to the downstream railroad line. This gate is inoperable and the present existence and condition of the pipeline is uncertain. There are three residential structures and a storage building located immediately downstream of the dam. Based upon the visual inspection at the site and past performance history, the dam appears to be in fair condition. No evidence of instability in the dam was observed. Downstream of the dam approximately 70 feet, the left channel wall is collapsed and at this point is in poor condition. There are some other areas requiring attention as well, in the form of minor maintenance or monitoring. Based upon our hydraulics computations, the spillway capacity is 1560 cubic feet per second cfs, which is equivalent to 18 of the Test Flood.
- Hydrology, Limnology and Potamology
- Civil Engineering