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2018-08-08_PERMIT FILE - C1982056 (18)
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2018-08-08_PERMIT FILE - C1982056 (18)
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Last modified
9/17/2018 8:54:16 AM
Creation date
9/17/2018 8:51:13 AM
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DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Permit File
Doc Date
8/8/2018
Section_Exhibit Name
EXHIBIT 13 GROUND WATER MODEL DOCUMENTATION
Media Type
D
Archive
No
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ADEQUACY RESPONSE <br /> General <br /> 1. Map TR-86-2-1 shows the drainage area for Pond F. Included on the map are <br /> diversion ditches F1, F2, G2, the permit boundary, Twentymile Coal Company's <br /> road on the southern boundary, the spoil spring and monitoring site number. <br /> The shape of the pond has been adjusted. Also included is diversion ditch El <br /> and a small extension proposed for E1. Rather than stockpile the sediment, <br /> CYCC proposes to spread it over the area surrounding the pond. As shown in <br /> the life-of-mine topsoil plan, there is no topsoil on this area. CYCC is not <br /> proposing this sediment as topsoil at this time; however, it will be ripped, <br /> seeded (cropland seed mix) and contour furrowed to stabilize the site. Final <br /> reclamation as shown in the life-of-mine topsoil plan will consist of <br /> topsoiling, which will be followed by chisel plowing, seeding (rangeland mix) <br /> and contour furrowing. <br /> 2. As shown on Map TR-86-2-1 the spoil spring diversion ditch has been <br /> designed to enter the east side of the pond so short-circuiting will not <br /> occur. The unused ditches will be regraded, ripped, seeded and contour <br /> furrowed. <br /> 3. Topsoil has already been removed from the entire area. <br /> 4. Table TR-86-2-4 shows the design calculations for the spoils spring ditch. <br /> The location is shown on Map TR-86-2- <br /> 5. The pond has been previously certified and a copy of the certification is <br /> already on file with CMLRD. No change to embankment or storage depth are <br /> planned. As a result, no recertification is necessary. <br /> 6. Map TR-86-2-1 shows the location for permanently routing the spoil spring <br /> to Foidel Creek. Designs for channel are shown on Table TR-86-2-4. <br /> 7. Sizing for the culvert below the railroad track is shown on Map TR-86-2-1. <br /> Discharge from both primary and emergency spillage is through this single 36 <br /> inch culvert. <br /> 8. Sediment from Pond F will be removed when it approaches 60% of the three- <br /> year design sediment storage volume. A staff gauge will be used to estimate <br /> the sediment level on a biannual basis. <br /> 9. Runoff from the western corner of the previously submitted map does not <br /> enter Pond F and has not been included in the drainage area as shown on the <br /> present map. The water which is collected in diversion ditch F2 comes off an <br /> undisturbed area. The small area of disturbance above diversion ditch F2 can <br /> be handled by the proposed extension of diversion ditch E1 (see Map TR-86- <br /> 2-1.) <br /> 10. The revised specifications for the riser are found on Map TR-86-2-2. <br /> 11. Map pocket page numbering and table of contents have been provided. <br /> EXHIBIT 13-1(k) 09-22-86 <br />
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