Wallace Saddle Dike Dam (Oconee Lake)

Field Descriptions

Dam Name: Wallace Saddle Dike
NID ID: GA83025
Longitude: -83.15
Latitude: 33.35
County: PUTNAM
River: OCONEE
State: GA
Nearest City: MILLEDGEVILLE
Distance: 26.00 miles
Owner Name: GEORGIA POWER COMPANY
Owner Type: U
Private Dam? No
Dam Type: RE
Core: Homogeneous Dam (Position)
Earth (Type)
Known (Certainty)
Foundation: SK
Year Completed: 1980
Dam Height: 10 feet
Maximum Discharge: 316800 cu ft/sec
Maximum Storage: 590000 acre-feet
Normal Storage: 470000 acre-feet
Surface Area: 21000 acres
Drainage Area: 1830 square miles
Hazard Potential: Low
Emergency Action Plan? Yes
Inspection Date: 1996-09-12
Inspection Frequency: 1.00
State Regulated Dam? No
Spillway Type: Controlled
Spillway Width: 266 feet
Outlet Gates: X
Federal Regulatory Agency: Department of Energy;
Federal Energy Regulatory Commission
Federal Inspection Agency: Department of Energy;
Federal Energy Regulatory Commission
Source Agency: Department of Energy;
Federal Energy Regulatory Commission

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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