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Silver Bow Basin (Nowell; Silver Bow Hydraulic Mine Mine), Juneau District, Juneau Borough, Alaska, USA

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View of the Silver Bow Basin gold mining area, ca. 1910.

Silver Bow Basin, Juneau District, Juneau Borough, Alaska, USA
View of the Silver Bow Basin gold mining area, ca. 1910.

Silver Bow Basin, Juneau District, Juneau Borough, Alaska, USA
View of the Silver Bow Basin gold mining area, ca. 1910.

Silver Bow Basin, Juneau District, Juneau Borough, Alaska, USA
Latitude & Longitude (WGS84): 58° 18' 40'' North , 134° 20' 34'' West
Latitude & Longitude (decimal): 58.31111,-134.34278
GeoHash:G#: c427wznwf
Locality type:Basin
Köppen climate type:Dfc : Subarctic climate


Location: This placer mine is at an elevation of approximately 1,050 feet, in the Silverbow Basin of Gold Creek, between the junction of Granite Creek and Icy Gulch. It is near the northeast corner of the SE1/4 section 18, T. 41 S., R. 68 E. of the Copper River Meridian. The location is accurate.
Geology: The Silverbow Basin placer in Gold Creek was discovered in 1880 by Joe Juneau and Richard Harris. By 1887, over 5,000 ounces of gold were estimated to have been recovered from sluicing operations (Spencer, 1906). Large scale hydraulic mining began in 1889 with 2 giants. The mine has a 3400-foot drainage tunnel, 2 shafts, and placer pit 1,800 feet long, 500 feet wide, and 100 feet deep. (Redman and others, 1989). The placer occupies a glacially-scoured postglacial lake basin that was filled with gravels from Lurvey Creek (JU162), Gold Creek, Icy, Nugget, and Quartz Gulches. The basin is approximately 3,000 feet long and 1,000 feet wide. Mining concentrated on the portion of the basin below the Alaska-Juneau vein system (JU165) (Cobb, 1978 [OFR 78-374]). Total production from the Gold Creek placers is estimated at over 63,000 ounces of gold; the Silverbow Basin probably accounting for well over 50,000 ounces of that total (Redman and others, 1989).
Workings: The Silverbow Basin placer was discovered in 1880 by Joe Juneau and Richard Harris. The mine has a 3400-foot drainage tunnel, 2 shafts, and a placer pit 1,800 feet long, 500 feet wide, and 100 feet deep.
Age: Quaternary.
Production: By 1887, over 5,000 ounces of gold is estimated to have been recovered from sluicing operations. Large scale hydraulic mining began in 1889 with 2 giants. Total production is estimated to exceed 50,000 ounces of gold.

Commodities (Major) - Au
Development Status: Yes; medium
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a)


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


1 valid mineral.

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References

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Becker, G.F., 1898, Reconnaissance of some gold fields of southern Alaska, with some notes on general geology: U.S. Geological Survey 18th annual report, Part 3, p. 7-86. Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Juneau quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-374, 155 p. Redman, E.C., Maas, K.M., Kurtak, J.M., and Miller, L.D., 1989, Bureau of Mines Mineral Investigations in the Juneau Mining District, Alaska, 1984-1988, Volume 2--Detailed mine, prospect, and mineral occurrence descriptions, Section D, Juneau Gold Belt Subarea: U.S. Bureau of Mines Special Publication, 424 p. Spencer, A.C., 1906, The Juneau Gold Belt, Alaska: U.S. Geological Survey Bulletin 287, 161 p.

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