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PERMFILE67396
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PERMFILE67396
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Entry Properties
Last modified
8/24/2016 11:13:10 PM
Creation date
11/20/2007 9:50:39 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977424
IBM Index Class Name
Permit File
Doc Date
3/25/1979
Doc Name
EXHIBIT A LEGAL DESCRIPTION AFFECTED LAND
Section_Exhibit Name
EXHIBIT A
Media Type
D
Archive
No
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4 <br />al~~ ~ <br />EXHIBIT G - WATER INFOR6SATION <br />The groundwater system at the Logan Wash property contains <br />water bearing zones separated by the impermeable Mahogany Zone. <br />This system is composed of an upper zone approximately 250 feet <br />thick above the Mahogany Zone. The lower zone is approximately <br />50 feet thick and extends down below the lean B-groove at the <br />base of the Mahogany Zone. These groundwater systems produce <br />only minor amounts of water (a maximum of approximately 75 <br />gpm) within the mine and generally dry up during dry periods. <br />These water bearing zones do not intersect any existing or planned <br />retort. Any communication between retorts and the upper water <br />bearing zone which is approximately 100 feet above the roof of <br />the tallest retort is only by occasional fracture. The operation <br />is not expected to directly affect surface or groundwater systems. <br />The main water bearing zone at Logan Wash is referred to as the <br />Broken Zone. See the attached rendering of Logan Wash typical <br />stratigraphic relationships. This zone is not permanently satur- <br />ated over the entire Logan Wash property, as indicated by standing <br />water levels taken in the different deep drill holes on the prop- <br />erty over the last 2 years of monitoring. These levels have varied <br />widely. <br />Due to the small amount of water in the groundwater system <br />and recycling procedures, there is little, if any, excess water <br />at Logan Wash after mining uses. Any excess is evaporated by <br />spraying over the raw shale dump pursuant to review by the Water <br />Qualtiy Control Division. Alluvial monitoring wells are located <br />below the dump to check if any of the sprayed water does not <br />evaporate and reaches the alluvium. A NPDES permit has been <br />
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