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Apr 19, 2021, 2:32 am

UNC MINING & MILLING CHURCH ROCK MILL CERCLIS Site

EPA Identifier: 110007975138
CERCLIS ID: 110007975138
Location:
35.64333, -108.5

Address:
STATE RT 566 UNC SITE
GALLUP, NM

Create Date: 01-MAR-00
Update Date: 09-AUG-10
Final Date: 19830908


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SIC Codes: 1094
SIC Descriptions:
URANIUM-RADIUM-VANADIUM ORES
Programs: {CERCLIS,NCDB,RA
Program Interests:
COMPLIANCE ACTIVITY, RAD NPL, SU

NAICS Descriptions:
URANIUM-RADIUM-VANADIUM ORE MINI
Site Summary:
Federal Register Notice:  September 08, 1983

Conditions at listing (October 1981): United Nuclear Corp. has operated a uranium mill on a 640-acre site near Church Rock, New Mexico (approximately 17 miles northeast of Gallup) since May 1977. Tailings from the mill are deposited in a large impoundment on-site. A break in the tailings dam in 1979 released 93 million gallons of tailings fluid to the Rio Puerco River. Subsequently, seepage from the impoundment contaminated the Upper Gallup aquifer in the vicinity of the pond.

Status (July 1983): New Mexico is requiring the company to address ground water contamination through a Ground Water Discharge Plan. For the State to approve the plan, it must include monitoring of ground water around the site, a program to control the migration of contaminants, and neutralization of the contents of the impoundment. The plan has not been approved as yet.