2013-06-12_REVISION - M1977436

• Permit No: M1977436
• IBM Index Class Name: REVISION
• Doc Date: 6/12/2013
• Doc Name: TR-05 PERMIT ADEQUACY LETTER
• From: DRMS
• To: Aggregate Industries - WCR, Inc.
• Type & Sequence: TR5
• Email Name: BMK
• Email Name: AJW
• Email Name: TAK
• Media Type: D
• Archive: No

DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St, Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
June 12, 2013
STATE OF COLORADO
COLORADO
D I VI S I O N OF
RECLAMATION
MINING
SAFETY
Ms Connie Davis
John W. Hickenlooper
Governor
Land Advisor
Aggregate Industries
Mike King
Executive Director
1707 Cole Blvd, Suite 100
Golden, Colorado 80401
Loretta E P neda
Director
Re: Brighton Mine, Permit # M- 1977 -436, Technical Revision #5, Permit Adequacy Letter
Dear Ms. Davis:
On June 12, 2013 the Division of Reclamation Mining and Safety completed the review of Technical Revision #5.
The Technical Revision addresses additional backfilling and grading of the unlined pond. In addition the
revision also proposes to allow Metro Wastewater Reclamation District temporary and permanent easements
for Metro's benefit to accommodate its construction and operation of a new wastewater treatment plant and
associated pipelines (the "Northern Treatment Plant "). It also grants Metro related to its sanitary sewer pipeline
and associated facilities, rights for riparian and wetland mitigation associated with construction of the Northern
Treatment Plant. The plan also requires a change in the approved seed mix which is included in the technical
revision. The Division has the following questions to be addressed prior to approving the revision.
1) The post mining land use under Amendment #2 and approved on October 3, 2002 is for the site to be
developed as recreation areas, with developed water resources of wetlands and lakes. How does a
waste water treatment facility and sanitary sewer pipe line meet this post mining land use, if the
construction is prior to release of site from reclamation responsibilities? Please explain
2) Where is the detailed design for the Metro waste water pipe lines? Where will the road be located for
the Metro Access? Would it be permanent or temporary? The Division requires a detailed map showing
the location of each structure labeling which ones will be permanent and which ones will be temporary
under the easement agreement. Would additional warranty be required to remove the associated
structures, and reclaim areas affected under the temporary easement? If any that will remain in place
must be shown in the revised plan maps. Such structures include access road, pipelines etc. Please
explain.
3) Where is the additional material going to come from to back fill the lake area? Would a notice in
accordance with Rule 3.1.5(9) be necessary to import inert fill from outside sources? Please explain
4) Even though Metro is going to undertake the reclamation of the mitigation areas, the ultimate
responsibility for the site is with the Aggregate Industries, the site will not be released until it meets the
approved reclamation plan. Please acknowledge.
5) Attached with the Technical revision is a map labeled as the "Hammer Pit ". Is the Bright Pit now known
as the Hammer pit? Please explain.
6) Please provide a detailed map showing the total lake and wetland areas that will remain in place as part
of the post mining land use? The operator stated, "The current revision request further reduces the
aerial extent of exposed groundwater with additional backfilling and grading to varied contours ". Does
that mean the current water augmentation or water substitute supply plan from the State Engineer will
be sufficient to meet their requirements? Please explain.
Office of
Mined land Reclamation Denver •Grand Junction •Durango Office of
Active and Inactive Mines