PERMFILE42479

• Permit No: M2002014
• IBM Index Class Name: Permit File
• Doc Date: 4/25/2002
• Doc Name: Preliminary Adequacy Review Letter
• From: DMG
• To: Robins Construction Co. LLLP
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
fAX: [phone]
April 25, 2002
DIVISION OF
MINERALS
GEOLOGY
RECLAMATION
MINING~SAFETY
Bill Owens
Governor
Greg E. Walther
Randy RObmS ~ Executive Director
Robins Construction Co., LLLP VVV Michael B. long
P.~. BOX 212 Division Director
AntOmtO, CO 81120
Re: Robins Pit N~1, File No. M-2002-014, New 110 App Ication, Preliminary Adequacy Review Letter.
Dear Mr. Robins,
I have completed my preliminary adequacy review of your application, as named above. This review included
materials submitted in February and April I have a few questions about the application which must be answered
before the decision date. Though your application was well prepared, and explained most of the details of this
straightforward operation, responses to the following questions will help the Division estimate a bond amount more
closely. These questions are arranged in the order of the exhibit to which they pertain; please arrange your
responses similarly to facilitate their review and inclusion in the permit application. I have included citations from
the Construction Materials Rules for your reference in preparing your responses.
Exhibit B -Site Description (Rule 6.3.2)
You provided generalized soil information from the NRCS soil survey, but there is no specific information about
the actual depth of the topsoil existing at the site. Please state an average depth or range of depths of the existing
topsoil.
Exhibit C - Mining Plan (Rule 6.3.3)
Related to the preceding question, please state the depth of topsail to be stripped and salvaged for later use in
reclamation of the site. This figure may be a range of depths or minimum depth.
Please describe where topsoil will be stockpiled during mining of each phase. If stockpiled along permit
boundaries, please state how close to the boundaries, and what equipment will be used to replace it (while not
disturbing areas outside the boundaries in the process).
Please describe how much acreage or distance ahead of the excavation activity that topsoil will be stripped.
The plan stated that reclamation would occur concurrently with mining. Please state how much area will be
disturbed before reclamation activities begin. Your response may be in the form of a maximum amount of
disturbed acreage at any point in the life of the operation.
Do you plan to maintain the staging area, for processing and stockpiling, in the same area of the permit, even
though excavation will progress through the several phases?
You stated that the pit slopes during mining would be no steeper than 3:1. This is an ideal way to ensure their
stability between periods of mining, and to keep the earthwork portion of your reclamation costs low. Your bond