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2022-01-18_GENERAL DOCUMENTS - C1992081
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2022-01-18_GENERAL DOCUMENTS - C1992081
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Entry Properties
Last modified
1/18/2022 3:54:31 PM
Creation date
1/18/2022 3:18:27 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1992081
IBM Index Class Name
General Documents
Doc Date
1/18/2022
Doc Name Note
For SL2
Doc Name
Proposed Decision and Findings of Compliance
From
DRMS
To
Hayden Gulch Terminal, LLC
Type & Sequence
SL2
Permit Index Doc Type
Findings
Email Name
TNL
JDM
Media Type
D
Archive
No
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required to be graded to blend into the surrounding topography and the approximate original contour <br /> (AOC), while maintaining positive drainage. Returning the area to the AOC does not apply to SL-2 <br /> with the post mining land use as recreational use. The tracks were removed, and the ballast graded to <br /> be used an elevated walking trail. <br /> A parking lot has been constructed by the operator just south of Hwy 40 to provide access to the trail. <br /> The trail has been graded and is easily walkable. Present at the site are multiple trail signs and <br /> maps of the 4.1 mile loop, a portable restroom, trash cans, and dog waste stations. The Town of <br /> Hayden currently leases the parcel and is maintaining the trail amenities. <br /> No coal was mined at the site;therefore,there is no acid-forming or toxic forming coal mine waste <br /> being generated at the site to dispose of. Processed coal was shipped from the site and all debris <br /> and coal fines were buried with a minimum of four feet of nontoxic, noncombustible material <br /> during the process of backfilling and grading. This material was then covered with topsoil to <br /> facilitate vegetative growth and prevent contamination of surface and groundwater. <br /> The facilities area was returned to approximate original contour representative of the topography <br /> that existed prior to construction of the Loadout. That area was previously bond released by the <br /> Division with SL-I. No streams were relocated as a result of the former operation. <br /> The permit area and adjacent lands contain two stream channels — Sage Creek and Dry Creek— <br /> with enough associated alluvium to be considered as potential alluvial valley floors. Both channels <br /> cross the permit area as well as adjacent area. Little Dry Creek runs through the former rail loop via <br /> large culverts. The creek is stable through the area and has well vegetated banks. During the <br /> Divisions inspections there has been no evidence of an excessive suspended solids. <br /> The dominant cations in Dry Creek water are magnesium, calcium and sodium. The dominant <br /> anion is sulfate. The pH is generally around 8.2. The concentrations of the major cations, total <br /> dissolved solids, and nitrate (possibly due to agricultural return flow) increase during periods of <br /> low flow(baseflow). Total suspended solids (TSS), aluminum and total iron increase during high <br /> flows. Average values for total dissolved solids (TDS) are higher downstream than upstream of <br /> the loadout,with average values of 2,439 and 3,175 mg/1 (milligrams per liter),respectively. <br /> Dry Creek alluvial ground water in the area down-gradient from the main surface disturbance of <br /> the Loadout can be classified as "Limited Use and Quality" based on natural TDS concentration <br /> being consistently above 10,000 mg/l in alluvial ground water well HGDAL-3. Ground water <br /> classified as "Limited Use and Quality" has limitations for only radioactive or organic pollutants. <br /> The Loadout was not likely to generate significant amounts of radioactive or organic pollutants; <br /> therefore,the operation did not have the potential to negatively impact the quality of ground water <br /> in the Dry Creek Alluvium. <br /> The portions of Dry Creek mapped as alluvial deposits will continue to be designated as part of <br /> the Dry Creek alluvial valley floor. The loadout has existed on the Dry Creek valley floor since <br /> early 1978. The area of the valley floor affected by the disturbance comprises approximately 4% <br /> of the area of unconsolidated alluvial deposits in the valley. <br /> 4 <br />
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