Water Resources and Use in Marion County
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Miles 100 - 500 MGD ¸ Marion 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 81-B BEDROCK AQUIFER SYSTEMS OF MARION COUNTY, INDIANA R. 4 E. R. 5 E. R. 3 E. R. 4 E. R. 2 E. R. 3 E. M u k e d t e S C r 465 Geist Reservoir n r C a e i 17 l 13 18 16 1 14 e d 15 The occurrence of bedrock aquifers depends on the original composition of the geologic material 421 e d i 14 17 16 7 15 13 18 3 k r R P 16 15 3 e 17 4 465 m k and subsequent changes which influence the hydraulic properties. Post-depositional processes, a 18 e 13 r M R e y r 14 R a 16 15 S C which promote jointing, fracturing and solution activity of exposed bedrock, generally increase 17 n S l C l e r a the hydraulic conductivity (permeability) of the upper portion of bedrock aquifer systems. e F B 86th St Nora v r i 69 Because permeability in many places is greatest near the bedrock surface, bedrock units within a R n c the upper 100 feet are commonly the most productive aquifers. 86th St h e M it i c h 21 22 h W Castleton 82nd St 20 i 19 g The yield of a bedrock aquifer depends on its hydraulic characteristics and the nature of the k 22 23 a 24 19 e 52 n 21 20 24 e 20 21 23 R 22 overlying deposits. Shale and glacial till act as aquitards, restricting recharge to underlying r 24 19 22 23 d Williams 20 C 21 bedrock aquifers. However, fracturing and/or jointing may occur in aquitards, which can d R Creek increase recharge to the underlying aquifers. Hydraulic properties of bedrock aquifers are highly k e F l a c l l i l a C variable. v re b 65 Augusta n ek o h s s i i 465 l Traders l Most bedrock aquifers are under confined conditions, mainly a result of low vertical hydraulic F A 30 29 28 27 Point 27 25 conductivity clay-rich materials, such as glacial till, overlying the bedrock. Therefore, the 25 29 28 26 28 27 26 30 30 potentiometric surface (water level) in most wells completed in bedrock rises above the top of 25 29 Ravenswood 28 27 26 the water-bearing zone. 29 73rd St Indian Lake Meridian Hills 71st St Oaklandon d The susceptibility of bedrock aquifer systems to surface contamination is largely dependent on 71st St lv B the type and thickness of the overlying sediments. Because bedrock aquifer systems have New e rd v fo A n 34 complex fracturing systems, once a contaminant has been introduced into a bedrock aquifer Augusta i 36 31 32 33 e B 35 35 n 33 34 L 36 32 system, it will be difficult to track and remediate. o 31 a 33 34 t 32 33 fa 31 32 s 34 y 35 36 y e e t Shore Three bedrock aquifer systems are identified within Marion County. They are, from youngest to te K T. 17 N. R Acres oldest and from west to east: the Borden Group of Mississippian age; the New Albany Shale of d T. 16 N. North Broad ek Rd Fort Harrison Lawrence Devonian and Mississippian age; and the Silurian and Devonian Carbonates. 62nd St Fall Cre k ek Crows Nest Cree T. 17 N. re Ripple all State Park 49-02659-IR C F T. 16 N. 4 3 Depth to bedrock ranges from outcropping along a relatively small area of the White River in the k d ssler Blvd East Dr 6 5 e e Ke 3 2 e k 4 1 north-central section of Marion County, to being overlain by unconsolidated deposits up to about r o e 3 2 1 v 5 C 4 o 6 5 A 3 1 6 r 305 feet thick in the northeast. Approximately 19 percent of all wells in this county are 2 n e C 4 Eagle io g Crows e L completed in bedrock. u l l 56th St i Creek G o 1 0.5 0 1 Mile t Nest t C l Blvd Reservoir e Kessler h St 56t E r a e v 10 Mississippian -- Borden Group Aquifer System g i 49-00010-PS 9 l 7 8 e R Rocky 11 8 10 12 e 7 C t 12 9 7 9 10 i Ripple 36 r h 11 12 e 8 7 1 0.5 0 1 Kilometer 10 11 e 6 9 W The Borden Group subcrops in the southwestern area of Marion County, and in a relatively small k SR 46th St k area of the northwestern corner of the county. This bedrock aquifer system is composed mostly d e Highwoods e R r of sandstone, siltstone, mudstone and shale. Although carbonates are somewhat rare, t s C r o discontinuous interbedded limestone lenses are present. The Borden Group in Marion County is Spring D P n a r 16 N 17 i 15 overlain by unconsolidated deposits up to approximately 240 feet in thickness. Hill D 465 y 18 d 15 14 13 w n 16 n 18 k 17 13 P a I 14 Wynnedale k m 18 17 e 49-01378-PS r The Borden Group is composed primarily of fine-grained materials that limit the movement of 13 e 14 re 16 15 15 h 38th St 16 C S groundwater to fractures, joints, and along the bedrock surface. This aquifer system is often I ll n a described as an aquitard, and yields of wells completed in it are typically quite limited. Because d F i 49-02790-IR a the Borden Group is generally not very productive, most wells produce either from the overlying n n e u v 38th St a M d e unconsolidated deposits or penetrate through the sandstone, siltstone, mudstone and shale in p R A i v R c o d h s 22 A 21 n n l favor of the underlying carbonates. i 22 e 20 a i g 19 n u l w 24 s a 23 r o 21 g e o n 20 24 19 s t o d t D r e R P a S 22 23 e g h W 20 d h t 21 19 r 22 n Wells started in this system are completed at depths ranging f rom approximately 35 to 400 feet. m 24 r S 49-03375-IN 21 23 o a o E a i e 49-00243-IN d N Domestic well yields range from 2 to 20 gallons per minute (gpm) with static water levels from G 65 i t r 30th St d e r e about 5 to 250 feet below surface. There are no registered significant groundwater withdrawal v l M e B 136 30th St C v facilities using the Borden Group Aquifer System. Clermont r A e o l m e s e 49-02849-EP n s p v 27 e 28 o A 29 a t ts s Where bedrock is shallow, risk to contamination from the surface or near surface sources is high. K n et 27 r 30 y us 28 26 25 e y e h 30 29 c Where the overlying sediments consist of thick fine-grained clay materials, the Borden Group v a U 25 K s C 28 i 27 C 26 as 70 r 29 R Aquifer System is at low risk to contamination. However, in some areas the aquifer system is a 30 L a M e w 25 26 a n v 28 27 fo fa e a A D t r y overlain by unconsolidated deposits composed primarily of sand and gravel outwash materials.