PERMFILE137650

• Permit No: M2001046
• IBM Index Class Name: Permit File
• Doc Date: 4/18/2002
• Doc Name: Adequacy Correspondence
• From: Banks and Gesso LLC
• To: DMG
• Media Type: D
• Archive: No

:: Banks and Gesso, LLC
April 18, 2002
Division of Minerals and Geology
Attn: Tony Waldron
1313 Sherman Street, Rm. 215
Denver, CO 80203
720 Kipling St.,Suite117
Lakewood, Colorado 80215
[phone]
Fax [phone]
www. banksandgesso.com
RE: File No. M-2001-046; Nix Sand and Gravel Mine; Owens Brothers Concrete Company;
Preliminary Adequacy Review Response
Dear Mr. Waldron:
We are in receipt of your second Adequacy Review, dated March 12, 2002, concerning the Nix
Sand and Gravel Mine. The responses to your additional concerns will follow the same order
presented in your letter.
6'.4.4 Exhibit D -Mining Plan
The Applicant will be placing almost all of the excess overburden back into Mine Areas Two and
Three once those pits have been completely excavated. Owens Brothers would like to reserve
the right to sell as much as 2,000 tons of overburden per year to off-site users. Backfill of the
remainder of the overburden will take place along the southern edges of Mine Areas Two and
Three. Placement of fill material in these areas will serve two purposes. One, the lake leveling
affect along the southern shore will be reduced by 6 to 12 inches. Two, the buffer between the
pond edge and the wetlands to the south of the property will be increased by approximatety 200
feet. The combined affect should greatly reduce, if not eliminate, the overall affect the lake
leveling has on the wetlands. The mining sequence will follow the numerical order of the Mine
Areas depicted on the Mine Plan Map, with the plant initially located in Area Four. Once mining
has progressed to the initial plant location, the plant will be relocated to the northwest corner of
Area Six. Lastly, for the purposes of topsoil disposal during reclamation, it assumed that all
salvaged topsoil is placed on top of the backfill material to an average depth of 2.3 feet. The
overburden and backfill volumes include topsoil amounts. Amore detailed description of the
mining sequence follows.
Mine Area One -Mining will begin in Area One. The area will be stripped of topsoil and.
overburden. The overburden will be stockpiled in the southeast corner of Mine Area 3. The
dredge or dragline will initially be located in the northwest corner of Mine Area One (as far away
from the south road as possible). Extraction will begin in that corner and progress southward
towards Weld County Road 28. Approximately 99,500 CY of overburden will be recovered from
this area. However, approximately 111,200 CY will be needed for final reclamation. All of the
overburden stripped from the area will be used during reclamation, with another 10,600 CY of
backfill material being supplied by stripping of Area Two. The maximum amount of topsoil
stockpiled for this phase is 99,500 CY.
Mine Area Two - As with Area One, the area will first be stripped of topsoil and overburden.
Stripping is expected to produce approximately 270,900 CY of overburden. Approximately
10,600 CY of the overburden will be placed directly into Mine Area One to complete reclamation
of that area. The remaining overburden will temporarily stockpiled in the southwest corner of
Mine Area Three. Mining of Area Two will begin in the southeast corner and progress
northwestward towards the mining limits. Backfill of the southern portion of Mine Area Two will be