National Dam Inspection Program. Tillson Lake Dam (NY 00083), Lower Hudson River Basin, Town of Gardiner, Ulster County, New York. Phase I Inspection Report,
Abstract
Examination of available documents and visual inspection of the dam did not reveal conditions which constitute an immediate hazard to human life or property. However, the dam has some serious deficiencies which require further investigation and remedial work. Hydrologic and hydraulic analysis indicates that maximum spillway discharge capacity without flashboards is only about 39% of the PMF peak outflow. The 1/2 PMF would overtop the earth embankment and would probably cause failure. Therefore, spillway capacity is considered 'seriously inadequate' and the dam is assessed as 'unsafe, non-emergency'. It is recommended that within 3 months after receipt of this report by the Owner, any appropriate remedial work should be completed. The detailed analysis and the design and construction observation of any remedial work should be done by a qualified, registered professional engineer. In the meantime, the flashboards should immediately be removed from the spillway and kept removed pending the results of the detailed hydrologic and hydraulic analysis. Also, the Owner should immediately institute a program to visually inspect the dam and its appurtenances at least once a month. Within 3 months after receipt of this report the Owner should complete an emergency action plan outlining action to be taken to minimize the downstream effects of an emergency, together with an effective warning system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1981
- Accession Number
- ADA105851
Entities
People
- Kenneth J. Male