Talk:Kirk Lake (New York)

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a. Description of the Dam and Appurtenant Structures The Kirk Lake Dam is composed of an approximately 220 foot long stone masonry-earth buttress dam. The crest of the dam is 60 feet wide and its maximum height above the river is 28 feet. The downstream masonry wall face of the dam is vertical. Upstream of the 11 foot thick wall is a 50 foot wide earth embankment with a slight upstream slope. Upstream of the earth embankment is another smaller concrete masonry wall. The slope of the fill upstream of this wall is unknown. Centrally located within the dam is a 15.5 foot wide stone masonry spillway section which has a 6 feet by 4 feet chamber.

The spillway has sills at three levels and the maximum and minimum depths of the sills are 5.3 feet and 2.3 feet respectively from the top of the dam. At the bottom of the chamber is the control for the reservoir drain. The reservoir drain is a 36-inch cast iron pipe, controlled by a gate valve. The intake is located in the lake approximately 200 feet upstream of the dam. The outlet is in the base of the spillway structure.

The spillway and reservoir drains discharge through a stone masonry lined channel about 15 feet deep.

Capacity is 0.5937 billion US gallons (2,247,000 m3).

e. Ownership Kirk Lake Dam is owned by the New York City Bureau of Water Supply. The person to contact is Mr. Don Grassman at the Department of Environmental Protection, P.O. Box 66, Valhalla, New York, 10595, Telephone (914) 232-5711.[1]