Powell Dam (Lake Powell)

Field Descriptions

Dam Name: Powell
NID ID: UT00252
Longitude: -110.62167
Latitude: 39.81333
Map Section: 6 12S 12ESL
County: CARBON
State: UT
Owner Type: S
Private Dam? No
Dam Type: RE
Year Completed: 1940
Dam Length: 50 feet
Dam Height: 22 feet
Maximum Storage: 50 acre-feet
Normal Storage: 37 acre-feet
Surface Area: 5 acres
Drainage Area: 1 square miles
Hazard Potential: Low
Emergency Action Plan? No
Inspection Frequency: 5.00
State Regulated Dam? Yes
State Regulating Agency: DIV. OF WATER RIGHTS
Spillway Type:
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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