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2008-08-22_PERMIT FILE - M2007087
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2008-08-22_PERMIT FILE - M2007087
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Last modified
8/24/2016 3:35:44 PM
Creation date
8/27/2008 3:12:04 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M2007087
IBM Index Class Name
PERMIT FILE
Doc Date
8/22/2008
Doc Name
Request for Comments
From
Adams County
To
DRMS
Email Name
DB2
Media Type
D
Archive
No
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Summary of Proposed Mining and Reclamation <br />The total acreage of the various parcels that make up <br />the property is 14.871 acres, but because easement <br />areas granted to the City of Thornton and a long <br />driveway out to Dahlia Street are excluded from any <br />mining activity, only 13.68+ acres is within the DRMS <br />permit area. Mining will be undertaken on just under <br />11 acres, as 2.7+ acres are designated as setback <br />areas where no mining, but some minor grading and <br />revegetation activities, will occur. <br />The sand and gravel re-sources average 151+ in depth, <br />but tends to be thinner on the east side of the <br />property. Mining will be undertaken using front-end <br />loaders, scrapers, motor graders, track-hoes, <br />bulldozers, dump trucks, and a water truck. A small <br />processing plant will be utilized on the site, and <br />relocated on-site as needed to allow mining of all the <br />available aggregate resources. The hours of operation <br />for both the mining and reclamation activities would <br />be 6:00 AM to 10:00 PM, except for equipment <br />maintenance, emergencies, and contracts requiring <br />either export of aggregate material or import of fill <br />material during other hours of operation. Depth to <br />ground water is 6'-10'+ below the existing ground <br />level, and this will be a wet mining operation with <br />no-dewatering or slurry wall/clay liner being <br />installed. A 21+ strata of sand and gravel material <br />will be left at the base of the excavation to provide <br />for hydraulic conductivity after mining and <br />reclamation is completed. <br />Access to the site will be the existing driveway onto <br />the 1-76 Frontage Road. A 5-year deadline is requested <br />to complete all mining, and will generate up to 110 <br />round-trip trucks/day on days when export of material <br />is occurring. A 10-year deadline is requested for <br />reclamation completion, and the import of inert fill <br />material is expected to generate 60 round-trip truck <br />trips/day on days when inert material is imported into <br />the site. During the period when mining and <br />reclamation activities are occurring concurrently, as <br />much as possible the operator will combine these truck <br />trips by having trucks bringing inert material into <br />the property, exit the property with excavated <br />aggregate material. <br />4
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