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Upstream from Sinclair is Wallace
Dam, impounding Lake Oconee. We couldn't get access to it the day we
were there, so we got this one shot from the gate to the office there.
Ga. Power maintains the Central Georgia Hydro Group Control Center
at this site. Size given as 120 feet high and 3,700 feet long,
Wallace Dam's capacity was listed at 321.3 Megawatts from
six turbine/generator assemblies, four of which can be operated as
pumps. Thus, Wallace is our third pumped storage facility that we have
(almost) bagged. The design calls for 25,000 acre-feet of water to be
released and pumped back daily. This causes the normal daily fluctuation
seen on Lake Sinclair of 2 feet, between 338 and 340 feet MSL.
Maximum flow through the turbines is given as 48,000 cfs. Five floodgates
are available if needed. Nominal pool of Lake Oconee was stated as 435
feet MSL.
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