By A. H. KOSCHMANN and M. H. BERGENDAHL - USGS 1968
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At several localities along the Snake River in Cassia, Jerome, and Minidoka Counties (fig. 12), placer deposits were productive in earlier years. The gold production of the counties is extremely difficult to ascertain because of the haphazard nature of early reporting and also because of the creation of new counties from old ones.
For example, Cassia and Jerome Counties were formed from part of Lincoln County, so that a certain amount of Lincoln County's early gold production must be credited to the placer districts in the newly formed counties. At any rate, Staley (1946, p. 30) credited about 22,000 ounces of gold to Snake River placers of Cassia County, 1,736 ounces to Jerome County, and 133 ounces to Minidoka County.
