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PERMFILE47020
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PERMFILE47020
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Last modified
8/24/2016 10:49:06 PM
Creation date
11/20/2007 1:00:30 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1999120
IBM Index Class Name
Permit File
Doc Date
3/10/2000
Doc Name
ADEQUACY REVIEW RESPONSE FOR CDMG 112 PERMIT APPLICATION M-99-120 FT LUPTON SAND AND GRAVEL MINE WEL
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BANKS AND GESSO
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DMG
Media Type
D
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<br />of the proposed access was notified by "return receipt mail", as shown in Attachment <br />"A" (Darrel and Nelva Bearson). <br />As part of the revised Exhibits C and F, the permit area has been expanded to <br />include the access road and is shown on the revised Exhibits. The increased <br />acreage of the permit area is also notated in both the legends of Exhibits C and F <br />and on the map of Exhibit C. The road will be constructed of 1 ft. of compacted base <br />course for its entire length leading to the mining area, to a width of 24 ft. including <br />tapered shoulders to the outward side to allow for positive drainage and at a length <br />of approximately 1300 ft. No other drainage structures will be associated with the <br />road, except for an 18 in culvert through which irrigation flow will pass for the <br />landowner over which the access road will traverse. <br />5.) The asphalt and concrete batch plants will be incorporated into the required <br />Colorado Dept. of Public Health and Environment (CDPH&E) combined stormwater <br />and discharge permit for the operation of this site, including the batch plants. In <br />order for the proposed mining and hatching operations to begin, CDPHBE approval <br />for stormwater control, any SPCC plans, and discharge of any operationally <br />produced water to the South Platte River will have to be obtained. The CDPH&E <br />approval criteria will ensure that no environmental degradation to either surface or <br />groundwater systems will occur due to this operation. <br />6.) Reclamation of the mining area Phases into the end-use, final-reclaimed water- <br />storage reservoir(s) will be concurrent with mining and will generally follow behind <br />the mining by one to one-and-one half years. It is anticipated that approximately 4.5 <br />acres will be mined each year in each Phase and it can be approximated that as a <br />concurrent function, the same amount of acreage will be reclaimed each year, by <br />backfilling, topsoiling, and revegetation, following behind the mining in the time-frame <br />stated previously. <br />7.) Please see Figure "B" in Attachment "C". All requested details of the Adequacy <br />Review are contained in this figure. The reconstructed Lupton Ditch alignment is not <br />a lateral berm, but in effect, will be a backfilled, impermeable dike designed to <br />separate the reclaimed reservoirs, or to operate them in conjunction through water <br />transfer via a conduit pipe. The conduit pipe location is shown in both plan and <br />cross-section views. The crest of the dike will only be 3 ft. above the designed high- <br />water level of the reservoirs and is to be built parallel to the potential flood-flow of the <br />South Platte River. It will be constructed of a combination of excavated shale, that <br />will provide the bonding and cementing properties to the backfill, and excess topsoil <br />from the site. The shale will be excavated with the same equipment as that already <br />described and listed in the mine plan (scrapers) and will be placed in lifts with <br />alternating layers of topsoil that will be compacted with a dozer, between each <br />combined lift, to ensure mixing and compaction. The dike will be essentially <br />impermeable. The base of the dike will be approximately 180 ft. in width with the <br />crest being approximately 52 ft. in width from waterline to waterline and <br />approximately 34 ft. from shoreline to shoreline. The CDMG required 3:1 and 2:1 <br />slopes will be incorporated, as shown on the figure. The length of the dike will be <br />approximately 1,150 ft. These details are shown, and further explained in the <br />
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