John Martin Dam & Reservoir (John Martin Reservoir)

Field Descriptions

Dam Name: John Martin Dam & Reservoir
Other Name: JOHN MARTIN RESERVOIR
Former Name: CADDOA DAM
NID ID: CO01283
Longitude: -102.93667
Latitude: 38.06833
Map Section: T14N, R49W, S8
County: BENT
River: ARKANSAS
State: CO
Nearest City: LAMAR
Distance: 20.00 miles
Owner Name: CESPA
Owner Type: Federal
Dam Designer: CESPA, CESPA
Private Dam? No
Dam Type: Gravity
Core: Core (Position)
Purposes: Flood Control
Year Completed: 1943
Dam Length: 13000 feet
Dam Height: 25 feet
Structural Height: 25 feet
Hydraulic Height: 25 feet
Maximum Storage: 608245 acre-feet
Normal Storage: 345250 acre-feet
Surface Area: 11590 acres
Hazard Potential: High
Emergency Action Plan? Yes
Inspection Date: 2010-08-02
Inspection Frequency: 5
State Regulated Dam? No
Spillway Type: None
Spillway Width: 0 feet
Outlet Gates: None, Vertical Lift
Federal Funding Agency: JOHN MARTIN RESERVOIR
Federal Design Agency: Department of Defense;
U.S. Army Corps of Engineers
Federal Construction Agency: Department of Defense;
U.S. Army Corps of Engineers
Federal Regulatory Agency: Department of Defense;
U.S. Army Corps of Engineers
Federal Inspection Agency: CE
Federal Operating Agency: Department of Defense;
U.S. Army Corps of Engineers
Federal Owner (Agency): Department of Defense;
U.S. Army Corps of Engineers
Other Federal Agencies: Department of Defense;
U.S. Army Corps of Engineers
Source Agency: Department of Defense;
U.S. Army Corps of Engineers

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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