SCDNR dates Lake Monticello’s completion to 1978. The Fairfield County reservoir was built as the upper pool of the Fairfield Pumped Storage Facility, paired with Parr Reservoir on the Broad River and connected to the energy complex that also includes the V.C. Summer Nuclear Station.
Pumped storage makes Monticello fundamentally different from a conventional river reservoir. Dominion’s shoreline-management material explains that water is pumped uphill from Parr Reservoir into Monticello when electricity demand is lower, then released back through turbines when demand rises. In practical terms, the lake stores energy by storing water.
That operating cycle can move a lot of water. Dominion describes typical generating-phase drawdowns of roughly 4.5 to 5 feet over a 10- to 12-hour period, followed by the reverse movement when water is pumped back into Monticello. SCDNR likewise warns boaters that changing levels can expose hazards and materially alter lake conditions.
The same reservoir became a major South Carolina fishing destination, especially for catfish and black bass. Public recreation exists alongside active power generation, a nuclear exclusion zone and operator-controlled shoreline, so understanding the machinery behind the lake is part of understanding how to fish and boat it safely.