Pine Flat Dam, Gravity dam and hydroelectric power station in Fresno County, United States
Pine Flat is a gravity dam on the Kings River in Fresno County that creates a large water storage area. The structure spans 555 meters and uses its elevation to power turbines at the nearby power plant, which generate electricity for the surrounding region.
The dam was completed in 1954 by the U.S. Army Corps of Engineers after years of debate about whether water should prioritize irrigation or flood control. In its first year of operation, it prevented a major flood, demonstrating the value of the project to skeptical local communities.
The reservoir provides reliable water supply for farms and fields across the Kings River Valley. Local farmers depend on controlled water releases to sustain their crops throughout the year.
The dam sits within a recreation area where visitors can hike and fish, especially during warmer months. Water levels fluctuate seasonally based on irrigation demand and rainfall, so the appearance of the reservoir changes throughout the year.
The three turbines on site use a specialized Francis design that handles both the high water pressure and elevation drop efficiently. This equipment remains in operation decades after the dam's completion, making it an engineering solution that has proven durable.
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