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2018-10-24_PERMIT FILE - M2018055 (6)
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2018-10-24_PERMIT FILE - M2018055 (6)
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Last modified
1/4/2025 6:54:15 AM
Creation date
10/24/2018 2:32:15 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M2018055
IBM Index Class Name
Permit File
Doc Date
10/24/2018
Doc Name
Application
From
Eagle Rocks Aggregate
To
DRMS
Email Name
SJM
WHE
Media Type
D
Archive
No
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Mining will be conducted with loaders, hoes, dozers, and off-highway haul trucks. Dozers or <br /> scrapers will strip topsoil from an area in advance of mining. Loaders and hoes will then <br /> excavated material either directly into the crushing plant or into haul trucks.No blasting will take <br /> place at the Tower Pit.No refuse, acid or toxic producing materials are expected to be <br /> encountered in this operation. If these materials are encountered, topsoil will be placed over the <br /> area and mining will move to a different area. <br /> The pit may accept concrete and asphalt materials that have been removed from existing sites in <br /> order that they can be recycled for use. Fill material may also be accepted into the mine site. Fill <br /> material will be spread out on the mined-out pit floor and will be blended into the final <br /> landscape. Some material may also be re-sold as construction material.None of this material can <br /> be accepted by the Operator unless the deliverer provides a certification that is inert. <br /> The active mining face will be vertical. Highwall mining will progress to an offset line from the <br /> crest line,which marks the mid-slope of the 2H:1 V mining slope. This offset serves two <br /> purposes. First,the volume of material left in the highwall will allow the crest to be pushed <br /> towards the toe for the final mining slope of 2H:1 V. Secondly, this offset provides additional <br /> slope safety. A failure would be governed by the internal angle of friction of the material. This <br /> would limit the failed slope to an angle of 34 degrees or—1.3H:1 V. This failure would not only <br /> stay within the permit area, it would stay within the final slope envelope. Such a failure is <br /> unlikely given that only the active slope is near vertical. <br /> The expected annual average production is 100,000 tons. Actual production rates will fluctuate <br /> based on market conditions. The raw material will be sold as crushed rock and sand. A <br /> breakdown of the anticipated product tonnages and mined tonnages can be seen in Table D-1. A <br /> breakdown of the estimated areas is included in Table D-2. <br /> Topsoil and overburden that is stockpiled will be placed in the facilities area on the east side of <br /> the site, as shown on Map C-2. Eagle Rock Aggregates, Inc. commits to keeping enough material <br /> onsite to be able to reclaim the site. Estimates on reclamation required topsoil and overburden <br /> will be calculated on an ongoing basis as reclamation will occur concurrently with mining. <br /> Therefore, surplus material estimates will become readily apparent as mining and reclamation <br /> progresses from area to area. <br /> Tower Pit Gnu I—icki and 1s—at-,PI IA <br /> October 2018 D-2 <br />
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