2006-02-23_REVISION - M1995004

• Permit No: M1995004
• IBM Index Class Name: Revision
• Doc Date: 2/23/2006
• Doc Name: Adequacy Review
• From: DMG
• To: Grand County Dept of Road and Bridge
• Type & Sequence: TR1
• 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]
Mazch 23, 2006
COLORADO
DIVISION O F
MINESRALS
GEOLOGY
FFC LAN ATION•NINING
EAFFTY•FCIENCE
BiII Owens
Governor
Billy L. Clark Russell George
Assistant Superintendent Executive Director
Grand County Department of Road and Bridge Ronald W. Cattany
P.O. Box 9 Division Director
Granby, CO 80446 Natural Resou¢e Trustee
RE: Grand County Road and Bridge Permit No. M-1995-004, Inspiration Point Gravel Pit;
Technical Revision Ol-Adequacy Review
Deaz Mr. Clazk,
The Division of Minerals and Geology (Division) has received Technical Revision Ol ("TR-Ol ")
for the Inspiration Point Gravel Pit, Permit No. M-1995-004. The purpose of the revision was to
update the Mining Plan (Exhibit D) under the existing permit. The purpose of this letter is to
present the Divisions comments regazding the adequacy of TR-Ol.
Following receipt of the revision, an inspection of the subject pit was performed on March 20,
2006. Representatives from both the Division and Grand County Department of Road and Bridge
were present at the inspection: Based on information contained in TR-Ol, the proposed revisions
to Exhibit D meet the requirements as outlined in Rule 6.4.4 of the Mineral Rules and
Regulations of the Colorado Mined Land Reclamation Board for the Extraction of Construction
Materials. However, based on observations made during the inspection and information provided
by Grand County Department of Road and Bridge personnel, the Division requests that the
following items be addressed prior to approval of the revision.
The original Reclamation Plan (Exhibit E) indicates that the reclaimed slopes will not exceed
3:1 (H:V). However, during our inspection you indicated that you would like to contour the
reclaimed slopes to match the natural topography, which can be as steep as 0.5:1 in some
areas. Typically, successful revegetation on slopes steeper than 2:1 is very difficult to
achieve. Therefore, the Division recommends maximum slopes of 2:1 for all reclaimed
slopes. If you choose to contour reclaimed slopes steeper than 3:1 as indicated in the original
reclamation plan, please change the reclamation plan to indicate that reclaimed slopes will be
no steeper than 2:1.
2. The Reclamation Plan Map included in TR-Ol does not have any elevations associated with
the proposed contours for the reclaimed slopes at the south end of the site. Therefore, it is
impossible to determine how steep the reclaimed slopes will be and if the map matches up
with the description presented in the Reclamation Plan. In addition, the proposed contours at
the south end of the site do not tie into the existing contours, making it lmcleaz as to what the
Office of Office of Colorado
Mined Land Reclamation Active and Inactive Mines Geological Survey