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2018-01-23_GENERAL DOCUMENTS - C1981041
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2018-01-23_GENERAL DOCUMENTS - C1981041
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Last modified
1/23/2018 1:45:42 PM
Creation date
1/23/2018 1:44:19 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
General Documents
Doc Date
1/23/2018
Doc Name Note
For RN7
Doc Name
Proposed Decision and Findings of Compliance
From
DRMS
To
Snowcap Coal Company, Inc
Permit Index Doc Type
Findings
Email Name
JHB
Media Type
D
Archive
No
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<br /> <br /> <br /> 34 C1981-041 RN7 findings <br />within 100 feet of the Colorado River (4.05.18(1)). The Unit Train Load out <br />has been approved as a commercial Industrial Land use, and has received <br />Phase III bond release (SL-7) and has been removed from the permit area <br />(TR-62). <br /> <br />K. Probable Hydrologic Consequences <br /> <br />The protection of the hydrologic balance is outlined in Volume 5, Tab 19 of the permit <br />application. This permit section addresses possible impacts due to mine subsidence, <br />possible impacts due to mine water discharge, and effects related to surface <br />disturbance. Possible hydrologic impacts due to construction of coal refuse piles are <br />also discussed in this document. The permittee's statement of hydrologic effects has <br />been reviewed by the Division for compliance with Rule 4.05.1 and 2.05.6(3). <br /> <br />Surface Water <br /> <br /> Surface Water Quantity <br /> <br />Possible hydrologic impacts on quantities of surface water due to the Roadside and <br />Cameo Mines include impacts to: <br /> <br />1. Quantity of flow in the Colorado River, <br />2. Quantities of flow in Rapid and Cottonwood Creeks, <br />3. Surface seeps and springs above the Roadside Mine, <br />4. Dams and reservoirs above the Roadside Mine, and <br />5. Impacts due to water consumption by mine operations. <br /> <br />1. The permittee states that approximately 0.47 cfs of mine discharge water is added <br />to the Colorado River, increasing the flow by an average of 0.01 percent. Most <br />of the water pumped from the Roadside North Portal ultimately comes from the <br />Colorado River by way of aquifers which subcrop below the alluvium of the <br />river. In addition, the water pumped from the Roadside Mine would naturally <br />contribute to base flows in the Colorado River through aquifer discharges to the <br />river. Therefore, the mining operation should have an insignificant effect on the <br />quantity of water in the surface and groundwater systems of the Colorado River. <br /> <br />2. Monitoring of both Cottonwood and Rapid Creek since 1985 has shown minimal <br />disturbance due to subsidence. Both creeks have infrequent flow patterns. <br />Cottonwood Creek, although a major tributary to Rapid Creek, is dry by late <br />summer. Rapid Creek is intermittent in nature. Where surface cracking was <br />observed, within a year the crack was refilled with sediment from the creek <br />channel. Minor ponding has also been observed to have taken place in the <br />subsided areas. This ponding was for a relatively short period and has <br />disappeared. Monitoring indicates that little surface flow has been lost due to <br />subsidence in the Rapid Creek Basin. <br />
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