In recent years small amounts of placer gold have been mined from the lower Chowchilla River west of Raymond in western Madera County. The gold has been recovered by several small- to medium-sized floating suction dredges, which consist of pontoons that carry suction pumps and gold-recovery equipment. The river gravels range from 10 to as much as 35 feet in depth. This area was first placer-mined during the gold rush, when the Grub Gulch district to the northeast was active.
Logan, C. A., 1950, Madera County, gold: California Jour. Mines and Geology, vol. 46, pp. 453-456.