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HYDRO27744
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HYDRO27744
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Last modified
8/24/2016 8:47:08 PM
Creation date
11/20/2007 8:23:51 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
Hydrology
Doc Date
2/11/1993
Doc Name
EVALUATION OF ALTERNATIVES FOR MANAGEMENT OF SALT IN MINE WATER DISCHARGES
Permit Index Doc Type
OTHER SURFACE WATER
Media Type
D
Archive
No
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1 <br />1 <br />t <br />1 <br /> <br />I! <br />4-8 <br />minimization) would be approximately 60 and 16 acres in size respectively. For all three <br />discharges, the surface area of the impoundments) required to evaporate the anticipated flow <br />of 290 gallons per minute (salt elimination) and 110 gallons per minute (salt minimization) <br />would be approximately 120 and 60 acres in size respectively. Based on data presented in <br />Table 1, the depth of the impoundments) would be on average 6 feet which would allow for <br />sufficient storage of precipitated salt over a 5-year time period. <br />The major work activities associated with this management alternative include the following. <br />• Construction of three equalization impoundments. <br /> <br />1 <br />1 <br /> <br />1 <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br />• Construction of single or multiple evaporative surface impound- <br />ments. <br />• Installation of support piping and pumping systems. <br />4.4.32 Effectiveness <br />The technical basis and approach for this alternative have been documented and could be <br />implemented at the facility if sufficient area exists for construction of the surface impound- <br />ments. The effectiveness of this management alternative is approximately 100 percent under <br />normal weather conditions. <br />4.4.3.3 Imnlementability <br />This alternative would be implemented at the facility if sufficient area exists for construction <br />of the evaporative surface impoundment(s). Based on the surface area requirements for the <br />anticipated flow rates, construction of the impoundments) and management of the construc- <br />tion spoil materials may significantly affect facility operations. <br />4.4.3.4 Coats <br />The budgetary costs to implement this alternative for the complete removal (100 percent <br />evaporation) are estimated to be $21,900,000 for the two current discharges and $45,600,000 <br />for all three discharges. These costs are based on evaporation of 140 gallons per minute and <br />290 gallons per minute for the two current discharges and ell three discharges respectively, and <br />unsuitable Bite topography for construction of the surface impoundment(e). The budgetary <br />coats to implement this alternative for partial removal of TDS in order to achieve compliance <br /> <br />
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