Dewey-Burdock Uranium In Situ Recovery Project - South Dakota ...
Dewey-Burdock Uranium In Situ Recovery Project - South Dakota ...
Dewey-Burdock Uranium In Situ Recovery Project - South Dakota ...
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<strong>Dewey</strong>-<strong>Burdock</strong> <strong>Uranium</strong> <strong>In</strong> <strong>Situ</strong><br />
<strong>Recovery</strong> <strong>Project</strong><br />
2007 Eastern <strong>South</strong> <strong>Dakota</strong> Water<br />
Conference and the 52nd Annual<br />
Midwest Groundwater<br />
Conference<br />
by Dr. Dan Hoyer<br />
RESPEC
Talk Objective<br />
<br />
<br />
<br />
<br />
<br />
Mining History<br />
<strong>In</strong> <strong>Situ</strong> Process<br />
Describe the geology, geochemistry, and hydrologic<br />
character of the prospect<br />
Review results of TVA:<br />
Pump test<br />
Chemistry<br />
Conclusion
<strong>Dewey</strong> Fault Zone
<strong>Dewey</strong>-<strong>Burdock</strong> History<br />
Three Major Open Pit Mines Operated in 1950s<br />
USGS <strong>In</strong>vestigations in 1955, 1965<br />
Tennessee Valley Authority Explored, Tested, and<br />
Went Through Permitting Process for Underground<br />
Mine and Processing Facility 1980s<br />
Powertech Has Leases and Claims on 11,180 Acres<br />
of Federal and Private Minerals<br />
Powertech-Certified Resources is 7.9 Million Pounds<br />
and Expects to Spend $15-20M
<strong>In</strong> <strong>Situ</strong> <strong>Recovery</strong> Process<br />
** This diagram is merely a representation of the recovery process and does not<br />
represent actual hydrogeologic conditions at the <strong>Dewey</strong> <strong>Burdock</strong> site.
Wellfield Patterns<br />
• There are three basic patterns (the Seven Spot and Five Spot being the<br />
same type of pattern)<br />
• The type of pattern used depends on the width of the ore body<br />
• U3O8 contact efficiency, restoration, and volume of pore water is also<br />
sensitive to patterns<br />
Seven Spot Five Spot Staggered Single Line Drive<br />
Line Drive<br />
<strong>In</strong>jection well<br />
Extractor Well
Dendogram of Aquifer Analysis<br />
0.00<br />
Similarity<br />
33.33<br />
66.67<br />
100.00<br />
Median1_Fall River<br />
Median1_Lakota<br />
Observations<br />
Median1_<strong>In</strong>yan Kara<br />
Median1_Sundance
<strong>Dewey</strong> Test 1984<br />
DownDraw Vs. Time<br />
0.00<br />
Time (minutes)<br />
1 10 100 1000 10000 100000 1000000<br />
DownDraw (ft)<br />
20.00<br />
40.00<br />
60.00<br />
80.00<br />
100.00<br />
120.00<br />
140.00<br />
160.00<br />
180.00<br />
200.00<br />
D1 Lak<br />
D2 Lak<br />
D3 Lak<br />
D4 Lak<br />
D5 Lak<br />
D6 Lak<br />
D8b Lak<br />
D20 Lak
Summary<br />
<strong>Dewey</strong>-<strong>Burdock</strong> Prospect Is Located North<br />
of Edgemont in the <strong>In</strong>yan Kara Formation<br />
The Lakota, Fusion, and Fall River<br />
Formations Make up the <strong>In</strong>yan Kara<br />
Geochemistry Within the <strong>In</strong>yan Kara Is<br />
Similar Both Spatially and Over Time<br />
<strong>In</strong>yan Kara Is Bounded by the Skull Creek<br />
and Morrison Shale Formation and Is<br />
Confined
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