National Dam Safety Program. Merriman Dam (NY 00121). Hudson River Valley, Roundout Creek, Ulster County, New York. Phase1 Inspection Report
Abstract
Merriman Dam (also known as Rondout or Lackawack Dam) is located in Ulster County, New York, approximately five miles northwest of the community of Ellenville. The dam and reservoir, owned by the City of New York, are part of the 'Delaware System' supplying water to New York City through the Delaware Aqueduct. Rondout Reservoir, placed in service in 1951, has a total available capacity of approximately fifty billion gallons and a surface area at spillway crest of 2,080 acres. Its associated drainage area is 95 square miles. Merriman Dam, completed in 1945, is a 'rolled earth embankment' approximately 2,400 feet long with a maximum height 195 feet above original ground. At its maximum section, the width of the dam is 60 feet at the top and 1,392 feet at the base. Merriman Dam and its appurtenances appear to be in excellent condition. The reservoir area, dam, spillway, tunnel and outlet works are well maintained. The spillway is adequate to pass flood flows equal to the Probable Maximum Flood with approximately 9.0 feet of freeboard still available below the top of the dam.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1978
- Accession Number
- ADA072015
Entities
Organizations
- New York State Department of Environmental Conservation