City of Rocks Uranium Placer Deposit

The City of Rocks Uranium Placer Deposit is a uranium mine located in Cassia county, Idaho at an elevation of 6,001 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: City of Rocks Uranium Placer Deposit  

State:  Idaho

County:  Cassia

Elevation: 6,001 Feet (1,829 Meters)

Primary Mineral: Uranium

Lat, Long: 42.0769, -113.69000

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Satelite image of the City of Rocks Uranium Placer Deposit

City of Rocks Uranium Placer Deposit MRDS details

Site Name

Primary: City of Rocks Uranium Placer Deposit


Primary: Uranium


State: Idaho
County: Cassia
District: Almo Area

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.


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Record Type: Site
Operation Category: Prospect
Deposit Type: Placer
Operation Type: Placer
Discovery Method: Ore-Mineral In Place
Years of Production:
Significant: N
Deposit Size: S


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Mineral Deposit Model

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Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Analytical Data

Analytical Data: AVERAGE U3O8 EQUIVALENT = 0.011%


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Comment (Development): Econ.Com: Occurrence Of Mineralogic, Rather Than Economic Importance


Reference (Deposit): IBMG Mines & Prospects Of The Pocatello Quad, 1982, V.E. Mitchell, Et Al

Reference (Deposit): Armstrong, F. C., 1964, Mineral Resources - Uranium, In Mineral And Water Resources Of Idaho: Idaho Bureau Of Mines And Geology Special Rept. No. 1, P. 258.

Reference (Deposit): Powers, H. A., 1955, Uranium: Idaho Bureau Of Mines And Geology Open File Report.

Idaho Gold

Where to Find Gold in Idaho

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more at Where to Find Gold in Idaho.