aquifer vulnerability map of the precambrian units, silver

Rapid Creek Lake Pactola Text Text Text 2 6 1 8 9 5 7 4 3 11 3 14 26 30 23 31 26 25 18 19 30 29 36 17 35 33 25 29 21 20 28 28 16 32 12 13 24 21 24 23 19 20 22 15 10 27 34 27 35 32 36 33 31 22 27 27 22 34 15 10 22 34 34 (MEDICINE MOUNTAIN) 44 o 00' 103 o 37' 30" (HILL CITY) 103 o 30' 44 o 00' (MOUNT RUSHMORE) (PACTOLA DAM) (ROCHFORD) Aquifer Vulnerability Map of the Precambrian Units, Silver City Quadrangle 44 o 07' 30" 103 o 30' (PIEDMONT) (NEMO) 103 o 37' 30" (MINNESOTA RIDGE) 44 o 07' 30" 32' 30" 6 12 6 16 6 17 6 18 6 19 6 11 000m. E. 6 13 5' 2' 30" T. 2 N. T. 1 N. 48 85 48 84 48 83 48 81 48 80 48 79 48 78 48 77 48 76 48 75 R. 4 E. 35' R. 5 E. 32' 30" 6 12 6 13 6 15 6 17 6 16 6 18 6 19 000m. E. T. 2 N. 2' 30" 5' 48 85 48 84 48 83 48 82 48 81 48 80 48 78 48 77 48 76 48 74 R. 5 E. R. 4 E. 35' By A.L. Lisenbee, A.D. Davis, M.H. Price, N. Toth, and K.R. Aurand 2012 South Dakota Quadrangle location Map base modified from U.S.G.S. 1:24,000-scale Silver City digital line graph. Geology layer from J.A. Redden, D. Alexander, and D. Nonnast, 2010. Projection is Universal Transverse Mercator, Zone 13, North American Datum 1983. REFERENCE SCALE 1 0 1 0.5 Miles 1 0 1 0.5 Kilometers Feet 1,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 Digital Cartography: K.R. Aurand, 2012. Department of Geology and Geological Engineering South Dakota School of Mines and Technology UTM GRID AND 1971 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET NORTH ^ MN GN 13 o 231 MILS 1 o 10' 21 MILS 48 79 48 75 6 11 48 74 48 86 48 86 000m. N. The preparation of this map was funded by the West Dakota Water Development District in association with the Department of Geology and Geological Engineering South Dakota School of Mines and Technology 1:24,000 Definition of Vulnerability Aquifer vulnerability is the potential or likelihood that any contaminant could reach the ground-water supply, based on designated parameters described below. Areas of increased aquifer vulnerability due to the presence of on-site wastewater disposal systems over the Precambrian crystalline aquifer. 0 - 10 Density (number of OSWDS per sq. mi.) 10 - 40 40 - 86 Rating Low to Medium Medium to High High to Very High Trail Paved Road Highway Type of Road Dirt Road Low Medium to High High to Very High Rating Low to Medium Geologic Structure Fault Solid where location certain; dashed where approximately located; queried where uncertain. Bar and ball on downthrown side. ? Railroad Lake Springs A Black Hills National Forest Boundary On-Site Wastewater Disposal System (OSWDS) Intermittent Stream Perennial Stream EXPLANATION Surficial Deposits Alluvium- Loosely consolidated to unconsolidated, typically stratified, rounded to angular, poorly to well sorted, clay to boulder sized clasts. Deposited as alluvial fans, in stream valleys, and on present floodplains. Includes Qal. Terrace Deposits, Colluvium- Loosely consolidated to unconsolidated, typically stratified, poorly to well sorted, heterogeneous sand to boulder sized clasts, deposited pediments, paleochannels, and terrace fills of older floodplains. Includes Qc, Qt, Qtg, and Qtl. Silver City TOPOGRAPHIC CONTOUR INTERVAL 20 FEET Increased aquifer vulnerability due to the presence of road (buffered 100 feet on either side) over the Precambrian crystalline aquifer. Floodplain Surficial Deposits Other Surficial Deposits T. 1 N. 48 74 000m. N. HWY 385 HWY 44

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(MEDICINE MOUNTAIN) 44o 00' 103o 37' 30" (HILL CITY) 103o 30'
44o 00' (MOUNT RUSHMORE)
Aquifer Vulnerability Map of the Precambrian Units, Silver City Quadrangle
44o 07' 30"
103o 30' (PIEDMONT)
(NEMO)103o 37' 30"
44o 07' 30" 32' 30"612 616 617 618 619611000m.E. 613
5'
612 613 615 617616 618 619000m.E.
T. 2 N.
R. 5 E.R. 4 E.35'
By A.L. Lisenbee, A.D. Davis, M.H. Price, N. Toth, and K.R. Aurand
2012
South Dakota
Quadrangle location
Map base modified from U.S.G.S. 1:24,000-scale Silver City digital line graph. Geology layer from J.A. Redden, D. Alexander, and D. Nonnast, 2010. Projection is Universal Transverse Mercator, Zone 13, North American Datum 1983.
REFERENCE SCALE 1 0 10.5
Miles
1 0 10.5 Kilometers
Feet 1,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000Digital Cartography: K.R. Aurand, 2012.
Department of Geology and Geological Engineering South Dakota School of Mines and Technology
UTM GRID AND 1971 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET
NORTH ^
4879
4875
611
4874
4886
4886000m.N.
The preparation of this map was funded by the West Dakota Water Development District in association with the Department of Geology and Geological Engineering South Dakota School of Mines and Technology
1:24,000
Definition of Vulnerability Aquifer vulnerability is the potential or likelihood that any contaminant could reach the ground-water supply, based on designated parameters described below. Areas of increased aquifer vulnerability due to the presence of on-site wastewater disposal systems over the Precambrian crystalline aquifer.
0 - 10 Density (number of OSWDS per sq. mi.)
10 - 40 40 - 86
Rating Low to Medium Medium to High High to Very High
Trail
Rating
?
Intermittent Stream Perennial Stream
EXPLANATION
Surficial Deposits Alluvium- Loosely consolidated to unconsolidated, typically stratified, rounded to angular, poorly to well sorted, clay to boulder sized clasts. Deposited as alluvial fans, in stream valleys, and on present floodplains. Includes Qal.
Terrace Deposits, Colluvium- Loosely consolidated to unconsolidated, typically stratified, poorly to well sorted, heterogeneous sand to boulder sized clasts, deposited pediments, paleochannels, and terrace fills of older floodplains. Includes Qc, Qt, Qtg, and Qtl.
Silver City
TOPOGRAPHIC CONTOUR INTERVAL 20 FEET
Increased aquifer vulnerability due to the presence of road (buffered 100 feet on either side) over the Precambrian crystalline aquifer.
Floodplain Surficial Deposits
Other Surficial Deposits
T. 1 N.

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