REP27857

• Permit No: M1977300
• IBM Index Class Name: Report
• Doc Date: 12/13/1979
• From: CDOH
• To: COTTER CORP
• Media Type: D
• Archive: No

LAST/ OFFICES
• EDWARD J. McGRATH APR ~ 1
14" FLOOR
51 MONROE 3
' ROCKVILLE. MA 20850
l301j -0600
April 17, 1980
Mr. Michael L, Brown
Health Physicist
Radiation and Hazardous Wastes
Control Division
Colorado Department of Health
Control Division
Colorado Department of Health
4210 East 11th Avenue
Denver, Colorado 80220
Re: Cotter Corporation
License Applica~:ion
Ore Sorter
Dear Mr. Brown:
Set forth below are the understandings reached at the conference
. held on April 10, 1980 between representatives of your office, the
U.S. NRC and Cotter Corporation, and the commitments undertal':en by
the latter at that time, relating to amendment of the pending appli-
cation of Cotter Corporation fora radioactive materials license to
operate an ore sorter located at the Schwartzwalder Mine of Cotter
in Jefferson County, Colorado. The purpose of the conference, and
the site visit which preceded it on April 9, 1980, was to reach agree-
ment on the matter which Cotter will submit and the issues which will
be addressed in the amended license application. Based upon the
conference, and the correspondence which preceded it, Cotter proposes
to file an amended application containing information originally sub-
mitted as supplemented and augmented by the following:
1. Since the mine waste storage area includes ore sorter reject
rock, the following inquiries will be made and the results included
in the amended license application:
A. Infiltration Rate Study of Mine Waste and Ore Sorter Reject
(i) Review literature pertaining to infiltration,
porosity, permeability in alluvium. Given the
larger viod space in the waste area, the factors
See Section 2.2 derived from the literature for alluvium will tend
to be conservative due to the lesser contact time
• between water and waste rock.