Grant County, Indiana
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¸ # n o h t " s S g Warren a n i b t a La Fontaine n u W S" H Huntington Mississinewa Huntington Wabash Wells Wabash Grant Lake Grant Miami ¸ # Van Buren t S" s l n l a e r W i G t n m a a r i G M ¸ # ¸ # Converse S" Sweetser Wells S" Blackford Miami ¸ d # Howar Marion S" 9 6 - I § ¨ ¦ ¸ # ¸ Swayzee # S" ¸ # ¸ ¸ # # Gas City d t r n a a S" w r o G M Upland d H r Jonesboro t o f S" i n k s a r S" c a G sis l sin B e w ¸ # a ¸ # Rive r S" ¸ # Fairmount S" Howard Tipton t n n o t a r p Matthews i G T S" W k ree Grant il Grant dcat C Delaware Madison D M e a l a n d w ¸ n o i # s s o a i o t r d n p e i a T M Summitville ¨¦§ S" I - 6 9 Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community Withdrawal Location River Major Lakes ¸ WELL INTAK# E 7Q2 Flow (MGD) Interstate S" ¸ Water Resources # Energy/Mining <10 MGD County ¸ # Industry Irrigation 10 - 50 MGD S" City ¸ and Use in # 50 - 100 MGD ¸ # Misc. Miles 100 - 500 MGD ¸ Grant County # Public Supply N 0 1 2 4 Data Sources: U.S. Geological Survey and Indiana Department of Natural Resources Rural Use > 500 MGD Mitchell E. Daniels, Jr., Governor Department of Natural Resources Division of Water Robert E. Carter, Jr., Director Aquifer Systems Map 59-B BEDROCK AQUIFER SYSTEMS OF GRANT COUNTY, INDIANA R. 9 E. R. 10 E. The occurrence of bedrock aquifers depends on the original composition of the rocks and R. 8 E. R. 9 E. T. 26 N. subsequent changes which influence the hydraulic properties. Post-depositional R. 7 E. R. 8 E. E T. 25 N. processes, which promote jointing, fracturing, and solution activity of exposed bedrock, R. 6 E. R. 7 E. 0 0 1 generally increase the hydraulic conductivity (permeability) of the upper portion of 1 d bedrock aquifer systems. Because permeability in many places is greatest near the T. 26 N. 2 a W o Black 2 1 0 T. 25 N. R bedrock surface, bedrock units within the upper 100 feet are commonly the most 3 0 3 1 4 5 y 6 4 6 t 5 2 1 Little productive aquifers. n d 3 6 E 4 2 Creek u a 3 0 o o 5 1 6 0 k C 2 R ee r 4 3 C 4 Mississinewa y Bedrock aquifer systems in the county are overlain by unconsolidated deposits of varying d t Metocinah County Road 600 N a n Lake o u thickness. Bedrock depth ranges from 50 feet or less below the surface on the western R o Fox C F y t portion of the county to more than 450 feet below the surface in the buried bedrock valley E r E 0 N County Road 60 a n n 0 0 9 c u 69 0 e 0 that cuts across the northeastern portion of Grant County. However, throughout much of s o 11 7 1 R S C S 5 12 d l d o Grant County bedrock is commonly 100 to 200 feet below the surface. Most of the a a 9 cu 9 8 8 10 o o 11 m 10 12 7 12 7 R bedrock aquifers in the county are under confined conditions. In other words, the 11 10 R R S T 8 1 9 E r y 7 a y k t t 11 12 il S 0 e potentiometric surface (water level) in most wells completed in bedrock rises above the n 10 n e 9 R 0 r u u 3 o o C County Road 500 N top of the water-bearing zone. 1 d C C Jalapa 5 a o 9 R 8 y The yield of a bedrock aquifer depends on its hydraulic characteristics and the nature of County Road 500 N t n W u 14 the overlying deposits. Shale and glacial till act as aquitards, restricting recharge to 15 o PS 0 M 18 27-02321- 13 C 14 W 15 0 17 is underlying bedrock aquifers. However, fracturing and/or jointing may occur in aquitards, 5 s 0 is 0 s d 15 in 14 13 16 9 a 13 Van which can increase recharge to the underlying aquifers. Hydraulic properties of the 3 e 16 w 16 l o d 1 18 a 17 e 18 R a 13 bedrock aquifers are highly variable. 14 17 m Buren o 15 y 16 R t m R 0 N 40 S ty Road n u Landess Coun y u t C R H o E n a iv r er Two bedrock aquifer systems are identified for Grant County. They are, from younger to C u t 0 o 0 older: the Silurian and Devonian Carbonates, and the Maquoketa Group of Ordovician C County Road 400 N C 0 1 re ek d age. Bedrock wells represent about 50 percent of all wells completed in the county. Hanfield a 24 22 o 23 21 R 19 20 20 23 y 21 22 24 t The susceptibility of bedrock aquifer systems to surface contamination is largely 20 21 19 n u 19 W 24 24 23 22 23 o dependent on the type and thickness of the overlying sediments. However, because the 21 22 0 C 0 County Road 300 N 2 bedrock aquifer systems have complex fracturing systems, once a contaminant has been d a 27-00492-IR introduced into a bedrock aquifer system, it will be difficult to track and remediate. o E R E 0 N y oad 300 0 County R 0 t 25 8 0 n W 6 d u 0 a 26 o d 25 0 o a 30 27 C 7 28 P o R ipe 28 26 29 d Silurian and Devonian Carbonates Aquifer System 27 R y a t B 25 y o 30 29 n 27 26 k t la u R 25 29 28 e n c 26 e k 30 o 27 r u 28 y o t C C nty Road 200 N Farrville n Cou C u C o 27-00147-IR The Silurian and Devonian Carbonates Aquifer System subcrops throughout much of E C re e County Road 200 N 0 k 0 Grant County. This aquifer system consists exclusively of Silurian age carbonates in 5 W ey C 0 s d ree Grant County. Because individual units of the Silurian and Devonian systems consist of a k 0 s o 27-01872-PS 3 a 35 Converse 31 34 36 R 32 similar carbonate rock types and cannot easily be distinguished on the basis of water well d M Mier 32 34 35 36 a 32 33 31 31 y 33 36 t o records, they are considered as a single water-bearing system. n 33 R 34 35 u y S o R 36 27-01873-PS t 1 C 8 n T. 25 N. 35 u Wells completed in the Silurian and Devonian Carbonates Aquifer System are generally 33 34 o County Road 100 N T. 24 N. C E 27-02715-IN Sweetser capable of meeting the needs of domestic and some high-capacity users in Grant County. 0 0 Domestic wells utilizing this system have reported depths ranging from 30 to 497 feet, County Road 100 N Marion 6 1 1 T. 25 N. d but are typically 90 to 220 feet deep. The amount of rock penetrated in this system 6 a T. 24 N. 1 4 3 2 1 5 5 o 2 4 2 1 commonly ranges from 30 to 150 feet. Typical yields for domestic wells range from 12 3 R y 3 SR 18 t to 40 gallons per minute (gpm) and static water levels are generally 20 to 55 feet below 6 5 4 n 1 u 3 2 4 T o land surface. There are 14 registered significant ground-water withdrawal facilities (29 a C y SR 18 wells) with reported yields from 15 to 550 gpm. lo r In most of Grant County the Silurian and Devonian Carbonates Aquifer System has a low r 7 susceptibility to surface contamination because it is overlain by thick clay deposits. uga 10 12 8 L 11 12 11 However, solution features (caves) are described on a few well records suggesting minor 9 8 9 12 10 7 10 7 8 9 Cr karst development. Therefore, areas where overlying clays are thin or absent are at 11 12 11 ee 9 10 k moderate to high risk to contamination. County Road 100 S Jadden Arcana County Road 100 S Ordovician -- Maquoketa Group Aquifer System 16 15 Cr 15 14 18 14 eek 17 16 13 13 16 15 14 13 18 17 18 17 14 13 In Grant County, the Maquoketa Group subcrops only in the buried pre-glacial valley 16 15 Home where the overlying Silurian and Devonian bedrock has been removed by erosion. The Michaelsville Corner County Road 200 S Maquoketa Group consists mostly of shale with interbedded limestone units. In general, County Road 200 S this system ranges from 650 to 750 feet thick in the county. However, no known wells 69 5 W Roseburg 0 utilize this aquifer system in Grant County because the Maquoketa Group lies about 250 R 0 S 4 20 21 24 23 24 19 22 23 to 450 feet below the ground surface and adequate water supplies are typically found in d 22 a 24 20 o 23 19 the overlying unconsolidated deposits or in the Silurian and Devonian Carbonates, where 24 21 22 S Herbst 20 R 22 19 k R 21 23 y e present.