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2023-08-07_GENERAL DOCUMENTS - C1992081
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2023-08-07_GENERAL DOCUMENTS - C1992081
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Last modified
8/9/2023 7:50:36 AM
Creation date
8/9/2023 7:46:07 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1992081
IBM Index Class Name
General Documents
Doc Date
8/7/2023
Doc Name
Proposed Decision and Findings of Compliance
From
DRMS
To
Hayden Gulch Terminal, LLC
Type & Sequence
RN6
Permit Index Doc Type
Findings
Email Name
HR1
MAC
Media Type
D
Archive
No
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The permit area and adjacent lands contain two stream channels Sage Creek and Dry <br /> Creekâwith enough associated alluvium to be considered as potential alluvial valley <br /> floors. Both channels cross the permit area as well as adjacent area. The permittee's <br /> alluvial valley floor analysis is contained in Tab 14 of the PAP. <br /> Below is a detailed consideration of the alluvial valley floor potential of each of the <br /> following two drainages: Dry Creek and Sage Creek. <br /> Evidence of vegetation and surface water quality at the loadout seems to suggest that the <br /> alluvial valley floor and surface water within the permit area is unsuitable for flood <br /> irrigation or subirrigation of hay or other field crops. However, based upon information <br /> included in the permit application (including mapping of alluvial deposits, agricultural <br /> fields located below the rail loop which may be subirrigated, and alluvial waters from <br /> Dry Creek apparently being used to irrigate hay fields downstream) and previous <br /> findings by the Division for the Seneca 11 -W Mine concerning Dry Creek, those <br /> portions of Dry Creek mapped as alluvial deposits will continue to be designated as part <br /> of the Dry Creek alluvial valley floor. <br /> The loadout has existed on the Dry Creek valley floor since early 1978. The area of the <br /> valley floor affected by the disturbance comprises approximately 4% of the area of <br /> unconsolidated alluvial deposits in the valley. None of the disturbance impinges upon <br /> the area of irrigated agriculture indicated by the applicant. No further disturbance is <br /> planned for this operation. Because of the small area involved and because the <br /> disturbance is contained with a sediment control system, the operation will have no <br /> significant effect on the integrity of surrounding agricultural activity. <br /> Impacts on surface water quality due to disturbances at the loadout will be minimal due <br /> to the size of the permit area with respect to the surface area drained by Dry Creek. <br /> Furthermore, data provided by the applicant indicates that coal stockpiled at the loadout <br /> does not contain any chemical constituents at high enough concentrations to be of <br /> concern with respect to contamination of surface water. Surface water effects will be <br /> monitored during and after mining by surface monitoring stations on Dry Creek <br /> upstream and downstream of the disturbance to verify this conclusion. <br /> A. The Division has determined that an alluvial valley floor exists within the affected or <br /> adjacent area. Therefore, the following findings are in order for the alluvial valley <br /> floor located on Dry Creek and Sage Creek. <br /> 1. The Division finds that activities proposed by the applicant will not interrupt, <br /> discontinue, or preclude farming on the alluvial valley floors that are irrigated <br /> or naturally sub -irrigated (4.24.3( 1)). The only mining related activity which <br /> would interrupt farming on an alluvial valley floor is the TAHR which has <br /> already been completed. <br /> 2. The proposed activities will not materially damage the quantity or quality of <br /> water in the surface or ground water system described above (4.24. 3(3) and <br /> 29 <br />
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