Carpenter Dam (Hamilton Lake)

Field Descriptions

Dam Name: Carpenter
Other Name: LAKE HAMILTON (RES)
NID ID: AR00534
Longitude: -93.0258
Latitude: 34.4431
Map Section: S27 T3S R19W
County: GARLAND
River: OUACHITA RIVER
State: AR
Nearest City: ANTIOCH & SULPHUR TOWNSHIPS
Owner Name: ENTERGY ARKANSAS, INC.
Owner Type: Public Utility
Dam Designer: EBASCO
Private Dam? No
Core: Homogeneous Dam (Position)
Concrete (Type)
Known (Certainty)
Foundation: RK
Purposes: Hydroelectric
Year Completed: 1932
Year Modified/Mod Type: 1990S
Dam Length: 1165 feet
Dam Height: 108 feet
Structural Height: 110 feet
Hydraulic Height: 95 feet
Maximum Discharge: 244000 cu ft/sec
Maximum Storage: 235500 acre-feet
Normal Storage: 183160 acre-feet
Surface Area: 6897 acres
Drainage Area: 1441 square miles
Hazard Potential: High
Emergency Action Plan? Yes
Inspection Date: 2012-08-29
Inspection Frequency: 1
State Regulated Dam? Yes
State Regulating Agency: ANRC
Spillway Type: Controlled
Spillway Width: 453 feet
Outlet Gates: T10;
Volume of Dam: 157750 cubic yards
Federal Funding Agency: LAKE HAMILTON (RES)
Federal Regulatory Agency:
Federal Inspection Agency:
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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