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REV97244
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REV97244
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Entry Properties
Last modified
8/25/2016 3:21:39 AM
Creation date
11/22/2007 12:07:31 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982057
IBM Index Class Name
Revision
Doc Date
6/12/2006
Doc Name
Proposed Decision & Findings of Compliance
From
DMG
To
Seneca Coal Company
Type & Sequence
PR5
Media Type
D
Archive
No
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Both Hubberson Gulch and Dry Creek may potentially be impacted by mining, <br />specifically by spoils discharge recharging the streams. Dependent upon the time <br />of year, Dry Creek may be recharging its alluvium, or the alluvium may be adding <br />water to the creek. Furthermore, dependent upon local conditions, discharges from <br />the predicted spoils aquifer may infiltrate the Hubberson Gulch alluvium. This <br />water may flow through the alluvium downgradient to recharge the Dry Creek <br />alluvium from which Olson Spring issues. <br />It is projected by the applicant that, due to dilution, there will be no impact to <br />Olson Spring quality which may be attributed to mining. An alluvial cross-section <br />of wells in Hubberson Gulch upgradient of the spring will help monitor the advance <br />of any plume in that gulch. Monitoring was conducted at Olson Spring (Site 8- <br />45) up until 2005 to provide baseline data and allow for future monitoring if <br />deemed necessary. The spring is actually a 3 foot diameter culvert clearwell <br />placed in the alluvium of Dry Creek. Since a well was drilled on the Olson <br />Ranch in 1980, it has not been put to use. Discontinuance of monitoring at <br />S-45 was approved in TR-52, in 2005. <br />Ten springs which are present in or adjacent to the permit area were chosen for <br />further study. At each of these sites, three water quality and discharge <br />measurements were made during the summer and fall of 1983. Typically, quality <br />and quantity varied from spring to spring. <br />In general, the water was very hard with average TDS values ranging from 458 <br />mg/] to 2,150 mgl1. Sulfate was generally more dominant than bicarbonate. All <br />but two springs experienced a decline in flow during the course of the summer. <br />Five had dried up by late August, three others flowed less water during base flow <br />and two were flowing at about the same rate in October as in June. <br />Three springs, Olson Spring (S~5 on Dry Creek), S-5 (on an 006 Gulch tributary), <br />and 5-41 (in the 006 Gulch channel), were projected to be impacted by mining <br />within the original permit area. 5-41, which fed a registered stock pond (Temple <br />Pond No. 2) was mined through and was buried in spoils in 1998. Pond 006 will <br />replace the Temple Pond No. 2 as a stock water impoundment. S-5 has been <br />observed to flow on only three occasions; in the spring of 1983, 1997 and 1998. <br />Olson Spring is an adjudicated domestic water right. Conductivity of the Olson <br />Spring has displayed a decreasing trend. <br />Two additional native springs occur along Hubberson Gulch upstream from the <br />potential influence of mining in the original permit area, but downstream from <br />mining activity in the south extension area. S-49 was located in the 016 Gulch <br />directly above the Pond 016 Site. The spring was developed with a 4 inch PVC <br />pipe that flowed into a metal stock tank. It was sampled between August 1997 and <br />Seneca [I-W Findings Document 38 Lune l2, 2006 <br />Permit Renewal No. 5 <br />
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