Maricopa County, John Overholtz property

The 'Maricopa County, John Overholtz property' file is part of the Kelsey Boltz Mining Collection. Kelsey Boltz has been a registered mining engineer and geologist in Arizona since the mid 1960s. A 1953 graduate of the Colorado School of Mines, he founded Colamer Corporation and Nuclear Dynamics, both companies active in the uranium industry in the Grants Uranium Region of New Mexico in the 50s, 60s and 70s. In 1981 he co-founded Century Capital, Inc., an investment banking and retail brokerage firm which provided several hundred million dollars financing for various industries including natural resource companies. In 1990 he started his exploration consulting company, Boltz Group International, which initiated and managed several mining projects in Mexico, Chile and Bolivia. The collection consists of geologic reports, maps, assays and surveys. The collection covers properties across the western U.S. and Mexico.


Resource ID: 
Resource Type: 
Document: Text
Theme Keywords: 
maps and atlases
Tungsten, Scheelite
Gold, Lode
Place Keywords: 
United States
Maricopa County
Granite Reef Dam - 7.5 Min
Big Red Tungsten
T2N R7E Sec 9 C
Lower Salt River physiographic area
Time Keywords: 
Publication Date: 
Kelsey Boltz
Bibliographic Citation: 
Please cite by using: [a description of the item]. 2004-01-0022, Kelsey Boltz mining collection, Arizona Geological Survey.
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