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Ch. 3: Precious Gem stones in 1903

Ch. 3: Precious Gem stones in 1903 Page of 130 Ch. 3: Precious Gem stones in 1903 Text size:minus plus Restore normal size   Mail page  Print this page
GOLD AKD SILVER.
187
The gold originating from placers came mainly from the following counties, named in order of production: Boise, Idaho, Lemhi, Kootenai, Shoshone, and Custer. The methods of working in use in jjlacer mines were reported as follows: Sluicing, 153 mines; hydraulicking, 81; drifting, 6; dredging, 8. The value of the gold product from each method is shown in the following statement:
Product of placers in 1904, classified by method used. [Fine ounces.]
Sluicing. The 153 properties worked by the sluicing method were located, in Idaho County, 25; Boise, 18; Nez Perce, 7; Lemhi, 6; Snake River operators, 76; the remaining 21 being distributed in other counties.
Hydraulicking. Of the 81 hydraulic properties, Boise County reported 28; Nez Perce, 13; Idaho, 11; Lemhi, 11; other counties, 18.
Drift mining. This method was reported only from Idaho County, in the Simpson district, on the Salmon River. The county is credited with 6 properties.
Dredging. Eight dredging companies reported production distributed as follows: Boise County, 3; Bingham, 1; Custer, 1; Lemhi, 1; Shoshone, 1; and Ada, 1.
The following table shows the gold produced in Idaho in 1903 and 1904 by the different methods of working placers:
Gold production of Idaho placers by different methods in 1903 and 1904[Fine ounces.]
Extraction by direct treatment by the cyanide process is in use in two counties, Owyhee and Washington, and is combined with amalgamation in Boise County in 2 plants, in Custer in 2, and in Nez Perce in 1. From reports of tests made with the cyanide process, many more properties will be likely to use this method of treatment, direct and in combination, on ores in several counties, results of which will be reported for 1905.
Ch. 3: Precious Gem stones in 1903 Page of 130 Ch. 3: Precious Gem stones in 1903
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US Geol. Surv. 1904. Gemstones, Metals.
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