1986-11-28_GENERAL DOCUMENTS - C1981017

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 11/28/1986
• Doc Name: Bid Documents ‎(IMP)‎
• Permit Index Doc Type: General Correspondence
• Media Type: D
• Archive: No

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DEPARTMENT OF NATURAL RESOURCES
David H.Getches,Executive Director
MINED LAND RECLAMATION DIVISION
1876* DAVIDC. SHELTON, Director
Richard D.Lamm
Governor
October 9, 1986
Mr. George Wear
Director, Special Projects
Mid-Continent Resources, Inc.
201 Centennial Street, Suite 406
Glenwood Springs, Colorado 81601
Re: Mid-Continent Bond Calculations, File No. C-81 -017
Dear Mr. Wear:
The Division has reviewed the September 22, 1986 bond submittal pursuant to
the mid-term review. This letter contains the Division' s comments, and
summarizes areas on which there is agreement between Mid-Continent and the
Division, and areas where further discussion is necessary.
I. Demolition
The Division generally agrees with the demolition costs presented by
Mid-Continent. However, the following costs must be revised:
1 ) Mid-Continent must add the cost of the glory hole bin demolition,
as construction of these bins is approved.
2) The cost of conveyer demolition at the Sutey Refuse area, and also
for the tunnel-to-wash-plant, seem to be low. Based on the July
1986 Mid-Continent submittal , the average demolition costs for
other conveyers was $10.41/foot. The current MLRD unit cost, which
is based on costs developed at the Deserado Mine, is $10.32/foot.
Costs developed by Schmusser for Mid-Continent averaged
$14.14/foot. The Division feels that the average cost of $10.41
developed by Mid-Continent would be acceptable. This would increase
the Rock Tunnel demolition costs to $132,238.00 (plus bin covers) ,
the prep plant costs to $223,446.00 and the Sutey demolition costs
to $230,771 .00. Demolition costs should also be calculated for the
conveyor stored at the old refuse pile.
II. Backfilling and Grading
1 ) The Division will accept the post mine topography and associated
backfilling volumes presented for the five mine benches. However,
based on the Caterpillar Performance Handbook, the Division feels
that equipment productivity has been over estimated by
Mid-Continent. The following table summarizes the Division' s
backfilling and grading estimates for the five benches:
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. [phone]