1992-07-22_GENERAL DOCUMENTS - C1981017

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 7/22/1992
• Doc Name: Bid Documents ‎(IMP)‎ Proposed Decision & Findings
• Media Type: D
• Archive: No

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Light use roads at Coal Basin are used for maintenance of ventilation fans,
explorations activities, subsidence monitoring, and access to mine
escapeways. The light use roads are infrequently used and most are not kept
open during the winter months. The locations of these roads are shown on
Exhibit II-B-5 of the application.
The applicant supplied sufficient information on the light use roads to find
the roads in compliance with all design criteria, except grade. No
information was submitted on the grade of the light use roads. Field
inspections indicated at least one light use road (Mine No. 2 escapeway) which
may exceed the overall grade of 10 percent and the maximum pitch grade of 20
percent. However, as previously discussed with regard to the haul and access
roads, if the roads are not in compliance, the resultant environmental damage
which would occur to bring them into compliance would be detrimental .
Furthermore, many of these light use roads, such as the Mine No. 2 escapeway,
are reseeded following each use if they are infrequently used. Therefore, the
Division finds the light use roads to be environmentally acceptable.
The Division has reviewed the road drainage designs and find the proposed
operation to be in compliance.
Two new access roads are planned to be constructed to the new refuse pile.
One road is to be constructed along the conveyor corridor for access to the
lower portion of the pile. The second road is to be constructed for access to
the upper portion of the pile and for conveyor maintenance. The proposed
designs meet the requirements of Rule 4.03.2, with one exception. The designs
for the road to the top of the pile contain conflicting information on the
slopes of road cuts and road embankments. Therefore, the following
stipulation is necessary.
Stipulation No. 11
PRIOR TO CONSTRUCTION OF THE ACCESS ROAD IN DISNEY CANYON, THE
PERMITTEE MUST EITHER COMMIT TO CONSTRUCTION OF THE ROAD CUTS AT A
GRADIENT NO STEEPER THAN lh:ly IN ROCK AND 1 .5h:ly IN UNCONSOLIDATED
MATERIAL AND COMMIT TO CONSTRUCTION OF ROAD EMBANKMENT AT GRADIENT NO
STEEPER THAN 1 .5h:ly OR SUBMIT APPROPRIATE GEOTECHNICAL ANALYSES WHICH
SHOW THAT THE PROPOSED ROAD CUTS HAVE A MINIMUM SAFETY FACTOR OF 1 .5
AND THE ROAD EMBANKMENTS HAVE A MINIMUM SAFETY FACTOR OF 1 .25. IF THE
PERMITTEE COMMITS TO THE STIPULATED CONSTRUCTION GRADIENT ABOVE, THE
CROSS-SECTIONS MUST BE CHANGED ON THE MAP.
With satisfactory resolution of the stipulation, the proposed operation will
be in compliance with the requirements of this section.
XX. Bonding - Rule 2.05.4(2)(b)
Prior to submission of Permit Revision No. 1 , Mid-Continent Resources had
submitted a reclamation bond in the amount of $2,350,623.00. The reclamation
cost estimate for the proposed activities in Permit Revision No. 1 is
$205,252.00 which makes the total bond amount required $2,555,875.00.
Mid-Continent Resources has submitted two deed of trust with a combined value
of $2,663,748.00 which is in excess of the amount required.