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GENERAL42910
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GENERAL42910
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Last modified
8/24/2016 8:11:42 PM
Creation date
11/23/2007 12:03:55 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1984041
IBM Index Class Name
General Documents
Doc Date
12/21/2001
From
CENTEX EAGLE GYPSUM CO LLC
To
DMG
Media Type
D
Archive
No
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shown by location on the map included as "Exhibit A". This exhibit has been prepared as <br />an abridged form of recent Annual Map submittals and focuses on remaining reclamation <br />work. An additional attachment "Exhibit B" provides a summarized description of the <br />location, current status and final plan for the five sub-areas. <br />Discussion on sloping, re-grading, erosion control, topsoil and vegetation tends to <br />remain the same for all of the sub-aeeas. To avoid redundancy, most of the detail will be <br />provided in the first section below and only alluded to in the remaining sections. <br />Old Crusher Area ("A"1 <br />This sub-area is located at the intersection of County Road #51 and the bottom of <br />the access haul road to the "Old Mine". Work in this area will represent the final step of <br />reclamation. Re-sloping here will include the entrance area to the access haul road. This <br />will need to occur after Access Haul Road ("Area D") reclamation (discussed below) is <br />complete. Inclusion of the haul road entrance in Area "A" work will provide the space <br />and ability to achieve the desired (3:1) slopes <br />Past site inspections and discussions with Dan Sokal of the Glenwood BLM <br />Office have resulted in the decision that the best approach for reclamation of Area "A" is <br />to construct a slope (with intermediate ledges as possible) against the crusher ruins and <br />escarpment wall. Adequate compacted fill can be maintained around the remains of the <br />crusher structure by using a small track dozer and backhoe. Sloping will be designed to <br />accommodate several feet of fill material over the crusher ruins. <br />Fill material will be hauled from the active mining area. It will consist of the same <br />clastic sediment, intrusive material encountered and used for slopes at the active <br />operation. These clastics have proved to be very suitable for such use -producing proven <br />stable slopes resistant to flow or movement. As an item perhaps of equal importance, <br />experience is in place to construct stable and natural looking slopes that visually blend in <br />with surrounding landscape. <br />As in the current practice, slope construction will incorporate site-specific and <br />proven methods of erosion control. Erosion control bazs have been used effectively in <br />slope construction to-date. Experience has also shown that use of track dozers provides <br />an additional method for accomplishing successful vegetation and erosion control. When <br />dozers place the topsoil layer, indentations are created by grousers on the tracks. These <br />indentations increase the chance for vegetation success by providing habitat for seedling <br />establishment. Areas where grouser marks have been intentionally left on slopes have <br />shown a higher success rate of vegetative cover than areas where slopes are graded <br />smooth. Due to this experience, the standard procedure in place is "to leave the grouser <br />marks." <br />Topsoil layers will be applied at a depth of 6-12". Available topsoil consists of <br />the indigenous layer of volcanic ash and gypsiferous soils that is cleared ("grubbed') <br />2 <br />
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