APPCOR13336

• Permit No: C1983058
• IBM Index Class Name: Application Correspondence
• Doc Date: 10/27/1983
• Doc Name: TWIN PINES NO 2 MINE DRAFT GEOTECHNICAL FINDINS
• From: MLRD
• To: CAROL RUSSELL
• Media Type: D
• Archive: No

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Richard D. Lamm
Governor
III III'lllll 1111 111
999
DEPARTMENT OF NATURAL RESOURCES
Davitl H. Getches, Ezeculive Director
MINED LAND RECLAMATION DIVISION
DAVID C. SHELTON, Director
October 27, 1983
T0: Carol Russell
FROM: Jim Pendleton
RE: Twin Pin s'No. ine - Draft Geotechnical Findings
XV. Coal Processing Waste an Non-Coal Processing Waste - Rules 2.05.3(8),
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(Add the following on page 28)
No coal processing will be conducted at the Twin Pines No. 2 mine site.
Therefore, no coal processing waste or non-coal processing waste will be
dispo~~d of at the mine site. (See page 86 of the permit application.)
The application is in compliance with the requirements of this section of the
Regulations.
XVI. Roads - Rules 2.05.3(3) and 4.03)
(Add the following as paragraph 3 on page 30)
The existing Fremont County road will be improved in accordance with County
standards. The driving surface will be expanded to 20 feet in width by
excavating and regrading the uphill cut slope. No redisturbance will occur on
the embankment fill slope downslope fran the existing road, adjoining Lewis
Gulch. Design details are presented on Drawing No. TP4 of the permit
application.
XVIII. 8ackfillinq and Grading -Rules 2.05.3(6)(b), 2.05.3(9
(Add the following as paragraphs 2 and 3 on page 31)
Underground development waste will be disposed of in a waste pile near the
northern terminus of the previously disturbed surface facilities area. Waste
will be placed in maximwn 4 foot thick lifts and compacted by normal equipment
traffic. Underdrains constructed of perforated t he in a gravel drain will be
installed to assure prevention of moisture invasion from beneath the pile.
The completed waste pile will be graded to a final facial slope of 2:1
(horizontal to vertical), with a maximum capacity of 89,000 cubic yards.
Underground development waste will be backstowed within the underground
workings whenever possible.
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. [phone]