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2015-05-05_PERMIT FILE - M2015001
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2015-05-05_PERMIT FILE - M2015001
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Last modified
8/24/2016 5:59:59 PM
Creation date
5/6/2015 10:18:05 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2015001
IBM Index Class Name
PERMIT FILE
Doc Date
5/5/2015
Doc Name
Response to Preliminary Technical Adequacy Review Letter
From
Tegre Corporation - G. Donaldson
To
DRMS
Email Name
RCO
Media Type
D
Archive
No
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CA <br />:)SSEIRE AGGREGRATE <br />SERVICES, LLC <br />Comparison of land Use <br />EXHIBIT E <br />Proposed post -mine use conforms to present and planned land use for the area. Official zoning <br />classification by the County for the site (Agricultural Ranching AR) will continue after mining is finished. <br />Private lands encompass and surround the project area. There are no State of Colorado or federal lands <br />or land use plans in the project area. <br />Compliance with Reclamation Standards <br />Please refer to maps in Exhibit F: Reclamation Plan Map. Most mining faces will be a vertical slope with <br />soil stripped approximately 10 feet to the rear of the face. Excess fines may also be stored in stockpiles <br />on the final floor of the pit until placed in final reclamation areas for backfill. All backfill will be placed as <br />engineered fill and compacted to approximately 75 Proctor density or better as determined by a <br />geotechnical engineer. <br />Exterior perimeter faces of pits will be mined at a taper, backfilled, or left sufficiently distant from the <br />permit boundary or buffer zone boundary, cut and fill to a 1V:2H slope or flatter or, where adjacent <br />natural slopes are steeper than 1V:2H, to match adjacent slopes. There are some areas which will be <br />left at a permanent slope of 1V:1H or vertical based on rock conditions as evaluated by an engineer at <br />the time of mining and stabilized as necessary. Widths and heights will vary from area to area based on <br />total depth of mining accomplished. All final slopes of 1V:2H or flatter will be covered with stockpiled <br />soil to control erosion and prevent damage. <br />Grading will be done so that erosion and sediment is controlled on affected lands and so that there is no <br />damage to areas outside the mining area. Where highwalls of 1V:1H or steeper are left, temporary and <br />permanent storm water management and erosion control features will be used on the uphill side as part <br />of stabilization and reclamation. All slopes greater than 1V:2H will be located at least 50 feet from all <br />exterior property boundaries to prevent property damage due to slope failure and to prevent potential <br />slides or other damage on affected lands or outside the permit boundary. No mining disturbance or <br />reclamation is planned within delineated floodplains. No surface discharge is planned. If surface <br />discharge of water is necessary, detention basins, outfall armoring, and other techniques will be <br />employed to prevent discharge of sediment. <br />Some areas, such as those involved in the improvement of the access road, will be reclaimed <br />immediately upon completion of work, however, for most of the affected area, the time between initial <br />disturbance and final reclamation will be approximately two years based on the size of each phase and <br />market fluctuations. The time to meet reclamation standards will vary. Backfilling, grading, and <br />placement of soil should be accomplished within one year of completion of extraction of construction <br />materials with seeding to follow as soon as possible based on the season and weather conditions. <br />Refuse and Toxic Materials <br />There is no reason to believe that toxic or toxic producing materials will be found or brought on -site, <br />therefore, no special action is necessary to prevent leaching, protect the drainage system, or prevent <br />unauthorized release of pollutants to surface water or groundwater beyond that necessary for erosion <br />control and control of spills and leaks from vehicles and equipment. Fine grade material will be almost <br />Prepared by Tegre Corp. <br />1199 Main Ave., Suite 101 <br />Durango, CO 81301 <br />(970) 828 -1811 <br />h.) cr I ' �' <br />
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