REV10040

• Permit No: M1977302
• IBM Index Class Name: Revision
• Doc Date: 3/3/1998
• Doc Name: OWL CANYON QUARRY RECLAMATION COST PN M-77-302 REX QUARRY RECLAMATION COST FN M-77-304
• From: DMG
• To: PETE LEIN & SONS INC
• Type & Sequence: TR3
• Media Type: D
• Archive: No

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STATE ~` iii iiiiiiiiuiii iii
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DIVISION OF MINERALS AND GEOLOGY
Drparlmnnl VI Nalurdl RQSOUrceS
U I 1 Sherman 51., Room 21 5

Ocnvcr. CnluraAo 80203 l~
Phun¢ 150 {I Nhb-35h7 l
FAX~.13051 H52-BI06
DEPARTMENT OF
NATURAL
March 3, 1998 RESOURCES
Nathan E~arton Roy Rumer
Go~emor
Pete Lien & Sons, Inc. lames s. ~ncnheae
P.O. Box 767 E'Pio1YP °1eCOr
Ra id Cit SD 57709-0767
p y, nllchael8 Long
Orvisi°n Direcl°r
RE: Owl Canyon Quarry, Reclamation Cost, Permit No. M-77-302
Rex Quarry, Reclamation Cost, Permit No. M-77-304
Dear Mr. Barton:
Based upon the Division's review of the approved reclamation plans and post-mining contours
for both the Rex Quarry and the Owl Canyon Quarry, the reclamation plan map and reclamation
cost evaluation submitted by Colorado Lien Company on January 16, 1998 will not be used to
complete the Division's current reclamation cost evaluation for existing disturbances at each
quarry. The map of existing disturbance provided on January 16, 1998 will continue to be used
in the evaluation. The purpose of this letter is to summarize the criteria that will be used to
complete the calculation of material volumes of overburden to be pushed and/or hauled and to
define specific reclamation tasks where additional information is needed. The immediate goals
of the Division aze to assemble all additional information needed by Mazch 31, 1998 and to
complete the reclamation cost evaluation for each quarry by April 30, 1998. Issues listed below
that contain the phrase "Please address this concern" provide an opportunity for Colorado Lien to
provide input that can be used to complete the reclamation cost evaluation for each quarry.
RECLAN[ATION CONTOURS
The post-mining contour map and representative cross-sections provided indicate that all slopes
will be reduced to a maximum of 2:1. A majority of the post-mining topography is shown to be
at a slope of 2:1. Further, the map and cross-sections show that there will be a pit left in the Rex
Quarry that ranges from 60 to 170 feet wide and from 10 to 50 feet deep. A review of the 1977
applications and 1985 permit amendment applications for both the Owl Canyon and Rex
Quarries indicates that each quarry will be reclaimed to wildlife habitat such that the quarried
areas will be backfilled with overburden, then leveled and graded to a maximum slope of 2:1,
and revegc:tated with a grass mix. The applications further state that the reclaimed slopes will
conform to the surrounding area and will follow the natural east sloping hogback formation as
closely as possible. A review of the 1977 and 198 mine plan maps provided for each quarry
indicate that undisturbed lands to be quarried (which are now disturbed) occur on slopes ranging
from 4:1 to 5: I. A review of the 1977 and 198 reclamation plan maps and post-mining contours