National Dam Safety Program. Lake George Outlet Dam (Inventory Number NY 230), Lake Champlain River Basin, Essex County, New York. Phase I Inspection Report,
Abstract
The examination of documents and visual inspection of the dam and appurtenant structures did not reveal conditions which constitute an immediate hazard to human life or property. The dam, however, has a number of problem areas which should be investigated further. The structural stability analysis indicates unsatisfactory stability for the dam when subjected to forces which could occur during winter operations (including ice loading), the Probable Maximum Flood (PMF), and 1/2 PMF events. A structural stability investigation of the dam should be started within 6 months to determine the effect of the dam's steel bar anchor system and the uplift forces acting on the base of the dam. Remedial measures should be completed within 2 years to increase the structural stability of the facility to meet the Corps of Engineers screening criteria. The hydrologic/hydraulic analysis establishes the spillway capacity as 46% of the Probable Maximum Flood (PMF) with the sluice gates open and 30% of the PMF if the gates remain closed throughout the storm. The dam will be overtopped by 2.72 feet by the PMF with the gates closed or 2.55 feet with the gates opened. However, the spillway is capable of passing the 1/2 PMF under either of these two conditions without the dam being overtopped. Therefore, the spillway is assessed as inadequate according to the Corps of Engineers screening criteria.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 28, 1980
- Accession Number
- ADA090941
Entities
People
- John B. Stetson
Organizations
- New York State Department of Environmental Conservation