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Big Creek #4 Powerhouse is a whitewater access point on the San Joaquin River located in Madera County near the coordinates 37.13895400, -119.48957800. This site provides access to a section of the San Joaquin River that flows through the Sierra Nevada foothills. The powerhouse infrastructure indicates this is part of hydroelectric operations in the area, which may affect water releases and flow conditions. Paddlers should be aware that dam-controlled rivers can have sudden changes in water levels and flow rates depending on power generation schedules.