2011-11-10_REVISION - C1984065 ‎(6)‎

• Permit No: C1984065
• IBM Index Class Name: REVISION
• Doc Date: 11/10/2011
• Doc Name: Proposed Decision & Findings
• From: DRMS
• To: Coal Ridge Mine
• Type & Sequence: RN6
• Email Name: JRS
• Email Name: DIH
• Media Type: D
• Archive: No

of site reclamation, the Division found that groundwater monitoring was no longer necessary.
This finding was based on the facts that the mine never produced coal, the portal entries did not
encounter groundwater, and monitoring from 1984 to 1994 indicated the limited development
work prior to reclamation had not impacted groundwater quality or quantity.
CDPS Permit No. COG - 850005 was given an inactive status by the Colorado Department of
Public Health and Environment, Water Quality Control Division effective 30 September 2004.
The Division suspended the mine's groundwater sampling with the approval of technical
Revision 11, approved on 14 July 1995.
There is no water discharged from the site with a pH of less than 6.0. Therefore no use of manual
lime feeder or other neutralizing agent for the treatment of water is considered [Rule
4.05.2(8)(a)] .
C. Diversions and Conveyance of Overland Flow
There are no diversions of perennial or intermittent streams in the permit area [Rule 4.05.3(3)].
There is no diversion on an existing landslide [Rule 4.05.3(5)].
D. Stream Channel Diversions
There are no diversions of stream channels or stream channel reconstruction (Rule 4.05.4).
E. Sedimentation Ponds
No sediment pond is located in a perennial stream [Rule 4.05.6(1)(b)].
The Division makes no proposal to approve the submittal of reports required
on other than a quarterly basis.
No alternative design criteria and specifications were submitted or have been
sediment pond design and/or construction [Rule 4.05.6(11)].
F. Acid - forming and Toxic - forming Spoil
No acid - forming or toxic - forming spoil was encountered on the site [Rule 4.05.8(3)].
G. Impoundments
The one impoundment on site is a sedimentation pond. See paragraph E above.
H. Surface and Ground Water Monitoring
by Rule 4.05.6(13)
approved for use in
1. Ground water monitoring at the site has been discontinued.
2. Surface water monitoring at the site has been discontinued since CDPS Permit No. COG -
850005 was given an inactive status effective 30 September 2004.
Coal Ridge No. 1 Mine
Permit Renewal 6 12 31 October 2011