Bemidji Lake Dam (Lake Bemidji )

Field Descriptions

Dam Name: Bemidji Lake
Other Name: STUMP LAKE
NID ID: MN00504
Longitude: -94.71833
Latitude: 47.4836
Map Section: S03 T146N R32W
County: BELTRAMI
River: MISSISSIPPI RIVER
State: MN
Nearest City: NONE
Distance: 2 miles
Owner Name: OTTERTAIL POWER CO
Owner Type: Public Utility
Private Dam? No
Dam Type: Gravity
Core: Unlisted/Unknown (Position)
Foundation: U
Purposes: Hydroelectric
Year Completed: 1907
Year Modified/Mod Type: 1997; 2008
Dam Length: 60 feet
Structural Height: 33 feet
Hydraulic Height: 24 feet
Maximum Discharge: 625 cu ft/sec
Maximum Storage: 4500 acre-feet
Normal Storage: 2500 acre-feet
Surface Area: 201 acres
Hazard Potential: Low
Emergency Action Plan? Not Required By Submitting Agency
Inspection Date: 2008-07-29
Inspection Frequency: 4
State Regulated Dam? Yes
State Regulating Agency: MNDNR WATERS
Spillway Width: 0 feet
Federal Funding Agency: STUMP LAKE
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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