Black Lake Dam (Black Lake)

Field Descriptions

Dam Name: Black Lake Dam
NID ID: NY01285
Longitude: -74.85333
Latitude: 41.65167
Map Section: Town of Bethel
County: SULLIVAN
River: BLACK LAKE CREEK
State: NY
Nearest City: BLACK LAKE
Owner Name: PAJUD REALTY CORPORATION
Owner Type: Private
Private Dam? No
Dam Type: Masonry
Purposes: Flood Control
Year Completed: 1917
Dam Length: 80 feet
Dam Height: 10 feet
Maximum Discharge: 780 cu ft/sec
Maximum Storage: 850 acre-feet
Normal Storage: 590 acre-feet
Surface Area: 198 acres
Hazard Potential: Low
Emergency Action Plan? No
Inspection Date: 2010-11-23
Inspection Frequency: 0
State Regulated Dam? Yes
State Regulating Agency: NYS DEC
Spillway Type: Controlled
Spillway Width: 0 feet
Source Agency:

Dam Safety For Boats

A large amount of water can be released from a dam without any warning at any time and by any means. For example, when the demand for electricity is high, the turbines at a dam may be turned on automatically, resulting in a significant increase in the downstream flow of water in only a matter of seconds.

If there's a need to release water through the sluiceways (outlets at the base of the dam), this operation can also create a great swell of discharged water downstream.

During flood operations, any or all spillway gates across the width of a dam can be opened to release upstream flood water that needs to pass to the next downstream reservoir. Upstream or downstream, even the most experienced boater with the strongest motor is no match for this strong flow of water plunging over a spillway of a dam. Even if you're boating far downstream of a spilling dam, recirculating current can pull a powerful boat upstream toward plunging water that could shred any boat.

Some dams equipped with navigation locks create turbulent water as well. When vessels pass through, strong flow is released near the exhaust ports of the wing wall of the lock.

Warning Systems At Dams

To warn reservoir users of potential danger, warning devices are installed at many dams:






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