Poteau River Wid Site 15 Dam (Lake Hinkle)

Field Descriptions

Dam Name: Poteau River Wid Site 15
Other Name: LAKE HINKLE DAM
NID ID: AR00857
Longitude: -94.25222
Latitude: 34.85278
Map Section: S11,T02N,R31W
County: SCOTT
River: JONES CREEK
State: AR
Nearest City: WINFIELD
Distance: 5 miles
Owner Name: ARKANSAS GAME AND FISH COMMISSION
Owner Type: State
Private Dam? No
Dam Type: Earth
Core: Homogeneous Dam (Position)
Earth (Type)
Known (Certainty)
Purposes: Recreation
Year Completed: 1971
Dam Length: 1030 feet
Dam Height: 77 feet
Structural Height: 77 feet
Hydraulic Height: 63 feet
Maximum Discharge: 24480 cu ft/sec
Maximum Storage: 41058 acre-feet
Normal Storage: 20000 acre-feet
Surface Area: 965 acres
Drainage Area: 11.2 square miles
Hazard Potential: Significant
Emergency Action Plan? Not Required By Submitting Agency
Inspection Date: 1989-05-18
Inspection Frequency: 0
State Regulated Dam? Yes
State Regulating Agency: ANRC
Spillway Type: Uncontrolled
Spillway Width: 0 feet
Outlet Gates: U
Volume of Dam: 295200 cubic yards
Federal Funding Agency: LAKE HINKLE DAM
Federal Design Agency: U.S. Department of Agriculture;
Natural Resources Conservation Service
Formerly Soil Conservation Service (SCS)
Federal Construction Agency: U.S. Department of Agriculture;
Natural Resources Conservation Service
Formerly Soil Conservation Service (SCS)
Federal Inspection Agency: U.S. Department of Agriculture;
Natural Resources Conservation Service
Formerly Soil Conservation Service (SCS)
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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