U.S. Department of the Interior

U.S. Geological Survey

Scientific Investigations Map 3313

Sheet 2 of 2

Potentiometric Surface, 2012, and Water-Level Differences, 2005–12,

of the Sparta Aquifer in North-Central Louisiana

By

Benton D. McGee and Jeffrey A. Brantly

2015

Prepared in cooperation with the

Louisiana Department of Transportation and Development

Acknowledgments

The authors thank Zahir “Bo” Bolourchi, Director, Public Works 

and Water Resources Division, Louisiana Department of Transportation 

and Development, for assistance provided during the study and during 

preparation of the report. The authors also thank the numerous well owners 

and water systems throughout north-central Louisiana, without whose 

cooperation this report would not be possible.

Figure 4. Water levels in well L-26, Lincoln Parish, Louisiana.

Figure 5. Water levels in well Ou-444, Ouachita Parish, Louisiana.

Figure 6. Water levels in well Cl-149, Claiborne Parish, Louisiana.

Table 1. Water-level data used to construct maps of the potentiometric surface, March–April 2012; water-level differences, 2005–12; and areas where water levels were at or below the top of the Sparta aquifer in north-central Louisiana, March–April 2012.

[USGS, U.S. Geological Survey; NGVD 29, National Geodetic Vertical Datum of 1929; WL, water level; --, no data]

Well

number

USGS station

number

Parish

name

Altitude

of land

surface 

(feet 

relative to 

NGVD 29)

Depth of 

well (feet)

Spring 2005 WL measurements Spring 2012 WL measurements

Waterlevel 

difference, 

spring 2005 

to spring 

2012 (feet)

Waterlevel rate 

of change 

(feet per 

year)

Date

Depth to 

water 

level (feet 

below land 

surface)

Waterlevel 

altitude in 

feet above 

NGVD 29

Date

Depth to 

water 

level (feet 

below 

land

surface)

Waterlevel 

altitude in 

feet above 

NGVD 29

Bi-112 321709092523901 Bienville 215 348 3/31/2005 90.27 124.73 3/15/2012 99.41 115.59 -9.14 -1.31

Bi-144 323505092535001 Bienville 320 630 4/7/2005 240.35 79.65 4/12/2012 252.80 67.20 -12.45 -1.77

Bi-216 322119092572301 Bienville 200 300 4/7/2005 14.52 185.48 4/10/2012 17.88 182.12 -3.36 -0.48

Bi-246 323244092550601 Bienville 340 583 3/4/2005 246.32 93.68 3/12/2012 284.62 55.38 -38.30 -5.45

Bi-253 323243093081202 Bienville 250 215 -- -- -- 4/20/2012 40.23 209.77 -- --

Bi-284 323241093031801 Bienville 259 440 3/30/2005 111.28 147.72 5/2/2012 133.08 125.92 -21.80 -3.07

Bi-76 321733093035001 Bienville 280 110 4/7/2005 45.98 234.02 3/15/2012 52.58 227.42 -6.60 -0.95

Bo-430 324850093373302 Bossier 380 353 -- -- -- 4/17/2012 183.98 196.02 -- --

Bo-446 325720093365701 Bossier 385 270 3/22/2005 139.09 245.91 4/5/2012 136.04 248.96 3.05 0.43

Bo-456 325055093443501 Bossier 295 262 3/22/2005 116.32 178.68 4/5/2012 121.74 173.26 -5.42 -0.77

Bo-488 324623093330201 Bossier 228 128 -- -- -- 4/20/2012 22.80 205.20 -- --

Bo-501 325425093334901 Bossier 242 120 3/22/2005 19.73 222.27 4/5/2012 22.48 219.52 -2.75 -0.39

Ca-27 321045092060701 Caldwell 60 845 4/5/2005 36.05 23.95 4/2/2012 39.95 20.05 -3.90 -0.56

Ca-51 321429092122801 Caldwell 180 500 4/5/2005 172.32 7.68 3/29/2012 177.64 2.36 -5.32 -0.76

Ca-86B 320154092164601 Caldwell 160 545 4/1/2005 82.94 77.06 4/2/2012 88.81 71.19 -5.87 -0.84

Cl-111 324817092512501 Claiborne 300 570 3/10/2005 290.04 9.96 4/17/2012 286.45 13.55 3.59 0.50

Cl-116 325228092490201 Claiborne 245 684 3/10/2005 262.50 -17.50 3/23/2012 253.46 -8.46 9.04 1.28

Cl-136 323943092573601 Claiborne 405 835 3/31/2005 326.86 78.14 3/26/2012 344.98 60.02 -18.12 -2.59

Cl-148 325437092503301 Claiborne 190 625 3/10/2005 199.03 -9.03 3/23/2012 189.27 0.73 9.76 1.39

Cl-149 330002092445901 Claiborne 230 736 3/10/2005 292.36 -62.36 3/23/2012 273.58 -43.58 18.78 2.67

Cl-150 325103092434901 Claiborne 225 750 3/8/2005 257.86 -32.86 3/14/2012 250.28 -25.28 7.58 1.08

Cl-151 324908092443501 Claiborne 180 719 -- -- -- 3/26/2012 201.52 -21.52 -- --

Cl-154 324809093071201 Claiborne 340 540 -- -- -- 4/30/2012 201.35 138.65 -- --

Cl-224 325122093024201 Claiborne 240 615 3/30/2005 160.00 80.00 4/30/2012 159.27 80.73 0.73 0.10

Cl-5717Z 325810093004401 Claiborne 278 440 -- -- -- 4/30/2012 226.36 51.64 -- --

Cl-58 324707093025001 Claiborne 250 482 3/10/2005 141.35 108.65 3/23/2012 141.17 108.83 0.18 0.03

Cl-9 325752093082701 Claiborne 360 670 3/10/2005 276.20 83.80 3/23/2012 264.90 95.10 11.30 1.60

Cl-91 324125093110201 Claiborne 335 522 -- -- -- 3/29/2012 198.49 136.51 -- --

Ja-115 321822092270402 Jackson 180 940 4/15/2005 200.48 -20.18 3/12/2012 205.70 -25.40 -5.22 -0.76

Ja-147 322357092341701 Jackson 220 703 4/1/2005 254.48 -34.48 4/24/2012 255.52 -35.52 -1.04 -0.15

Ja-148 321338092345801 Jackson 245 578 4/1/2005 230.18 14.82 4/4/2012 233.49 11.51 -3.31 -0.47

Ja-149 322433092412101 Jackson 195 478 4/1/2005 189.51 5.49 4/24/2012 192.33 2.67 -2.82 -0.40

Ja-154 321429092402002 Jackson 302 605 -- -- -- 3/30/2012 279.50 22.50 -- --

Ja-182 321432092424902 Jackson 220 370 -- -- -- 3/30/2012 233.89 -13.89 -- --

Ja-3 320923092421401 Jackson 180 635 -- -- -- 3/20/2012 129.71 50.29 -- --

Ja-356 322056092432401 Jackson 230 590 -- -- -- 3/28/2012 224.06 5.94 -- --

Ja-49 321709092452401 Jackson 160 570 -- -- -- 3/15/2012 156.61 3.39 -- --

Ja-91 321648092430802 Jackson 190 510 -- -- -- 3/30/2012 197.03 -7.03 -- --

L-113 323013092482001 Lincoln 355 750 4/7/2005 320.13 34.87 3/15/2012 330.66 24.34 -10.53 -1.52

L-117 324202092322601 Lincoln 86 551 3/17/2005 153.19 -67.19 3/16/2012 145.09 -59.09 8.10 1.16

L-119 323159092442402 Lincoln 350 473 -- -- -- 3/28/2012 374.91 -24.91 -- --

L-120 323128092384102 Lincoln 280 593 -- -- -- 3/14/2012 356.87 -76.87 -- --

L-137 323319092392001 Lincoln 240 600 3/16/2005 306.73 -66.73 3/14/2012 310.04 -70.04 -3.31 -0.47

L-152 322900092404101 Lincoln 289 602 4/6/2005 325.44 -36.04 3/15/2012 333.05 -43.65 -7.61 -1.10

L-163 323802092345902 Lincoln 169 633 -- -- -- 3/14/2012 234.73 -65.73 -- --

L-186 323235092454801 Lincoln 330 605 -- -- -- 3/19/2012 332.28 -2.28 -- --

L-208 323212092471301 Lincoln 310 630 -- -- -- 3/15/2012 321.55 -11.55 -- --

L-219 322917092433601 Lincoln 300 649 4/6/2005 333.90 -33.90 3/28/2012 347.50 -47.50 -13.60 -1.95

L-26 324141092390501 Lincoln 155 686 4/4/2005 190.92 -35.92 3/14/2012 191.32 -36.32 -0.40 -0.06

L-32 323138092365201 Lincoln 280 652 3/11/2005 352.56 -72.56 3/14/2012 360.14 -80.14 -7.58 -1.08

L-5868Z 323826092361901 Lincoln 153 520 -- -- -- 5/4/2012 223.06 -70.06 -- --

L-68 323458092275101 Lincoln 180 770 4/5/2005 258.12 -78.12 3/14/2012 264.92 -84.92 -6.80 -0.98

Mo-347 324352091531001 Morehouse 142 833 3/17/2005 177.26 -34.99 3/9/2012 153.54 -11.27 23.72 3.40

Mo-350 325707091574701 Morehouse 112 740 3/17/2005 114.61 -2.53 3/9/2012 106.11 5.97 8.50 1.22

Mo-423 324128091521801 Morehouse 80 778 3/9/2005 108.67 -28.67 3/13/2012 91.06 -11.06 17.61 2.51

Mo-5 324626091543901 Morehouse 117 860 4/5/2005 163.52 -46.08 3/9/2012 128.69 -11.25 34.83 5.02

Mo-84 324654091545301 Morehouse 138 608 -- -- -- 3/9/2012 149.90 -11.90 -- --

Mo-86 324636091473402 Morehouse 95 600 3/9/2005 107.69 -12.69 3/13/2012 88.76 6.24 18.93 2.70

Na-519 320608092594601 Natchitoches 240 47 4/11/2005 16.14 223.86 4/24/2012 24.78 215.22 -8.64 -1.23

Well

number

USGS station

number

Parish

name

Altitude

of land

surface 

(feet 

relative to 

NGVD 29)

Depth of 

well (feet)

Spring 2005 WL measurements Spring 2012 WL measurements

Waterlevel 

difference, 

spring 2005 

to spring 

2012 (feet)

Waterlevel rate 

of change 

(feet per 

year)

Date

Depth to 

water 

level (feet 

below land 

surface)

Waterlevel 

altitude in 

feet above 

NGVD 29

Date

Depth to 

water 

level (feet 

below 

land

surface)

Waterlevel 

altitude in 

feet above 

NGVD 29

Na-534 320009092543601 Natchitoches 147 110 4/12/2005 26.12 120.88 3/27/2012 32.39 114.61 -6.27 -0.90

Na-562 313925093044401 Natchitoches 160 725 -- -- -- 4/3/2012 50.23 109.77 -- --

Ou-163 323155092021101 Ouachita 80 581 4/18/2005 140.95 -60.95 4/16/2012 133.82 -53.82 7.13 1.02

Ou-401A 322422092020701 Ouachita 62 397 3/3/2005 112.47 -50.19 4/24/2012 112.61 -50.33 -0.14 -0.02

Ou-402 321714092041401 Ouachita 63 750 3/3/2005 61.47 1.83 4/2/2012 64.39 -1.09 -2.92 -0.41

Ou-404 323030091554801 Ouachita 61 685 3/3/2005 88.76 -27.87 4/2/2012 84.30 -23.41 4.46 0.63

Ou-443 323100092165801 Ouachita 118 860 4/6/2005 239.33 -121.33 4/4/2012 241.27 -123.27 -1.94 -0.28

Ou-444 323100092165802 Ouachita 118 670 -- -- -- 4/4/2012 243.60 -125.60 -- --

Ou-445 323100092165803 Ouachita 118 454 -- -- -- 4/4/2012 243.55 -125.55 -- --

Ou-80 322843092084401 Ouachita 60 721 -- -- -- 4/5/2012 263.32 -203.32 -- --

Sa-356 312422093234601 Sabine 269 1605 -- -- -- 4/24/2012 116.50 152.90 -- --

Sa-389 312314093352901 Sabine 260 383 -- -- -- 4/12/2012 83.60 176.40 -- --

Un-136 325555092370501 Union 220 475 3/29/2005 276.81 -56.81 4/11/2012 264.88 -44.88 11.93 1.69

Un-138 324707092292501 Union 220 700 3/29/2005 304.88 -84.88 4/17/2012 300.57 -80.57 4.31 0.61

Un-142 323733092220501 Union 200 640 -- -- -- 4/4/2012 318.65 -118.65 -- --

Un-193 325006092260101 Union 200 715 -- -- -- 4/4/2012 295.62 -95.62 -- --

Un-206 325409092335701 Union 210 676 4/21/2005 284.71 -74.71 4/17/2012 275.85 -65.85 8.86 1.27

Un-209 324616092241701 Union 160 684 3/29/2005 248.51 -88.51 4/14/2012 245.65 -85.65 2.86 0.41

Un-223 325428092294701 Union 236 705 -- -- -- 4/17/2012 298.60 -62.60 -- --

Un-237 325408092150001 Union 159 520 -- -- -- 4/11/2012 202.40 -43.40 -- --

Un-238 325342092150801 Union 161 475 -- -- -- 4/11/2012 208.73 -47.73 -- --

Un-26 324417092090001 Union 134 745 4/5/2005 195.89 -61.97 3/13/2012 184.54 -50.62 11.35 1.63

Un-79 324955092084001 Union 118 749 3/31/2005 165.11 -47.11 4/4/2012 155.42 -37.42 9.69 1.38

Un-80 324917092242001 Union 190 710 -- -- -- 4/4/2012 269.87 -79.87 -- --

Un-82 325550092391601 Union 122 656 4/4/2005 176.33 -54.33 4/30/2012 163.04 -41.04 13.29 1.88

Un-83 325550092391602 Union 122 326 4/4/2005 171.17 -49.17 4/30/2012 159.24 -37.24 11.93 1.69

Un-84 325647092241501 Union 210 696 4/5/2005 262.64 -52.64 3/13/2012 255.71 -45.71 6.93 1.00

Un-86 325929092114001 Union 90 655 3/17/2005 111.58 -21.58 3/13/2012 107.93 -17.93 3.65 0.52

W-114 315353092470001 Winn 300 700 -- -- -- 3/12/2012 214.81 85.19 -- --

W-144B 315450092310102 Winn 140 550 3/7/2005 56.53 83.47 3/1/2012 60.94 79.06 -4.41 -0.63

W-156 320619092341601 Winn 257 829 4/8/2005 216.36 40.64 3/14/2012 219.65 37.35 -3.29 -0.47

W-160 315646092352101 Winn 160 553 -- -- -- 3/15/2012 106.12 53.88 -- --

W-165 315558092375501 Winn 100 456 -- -- -- 3/20/2012 83.87 16.13 -- --

W-171 315756092463402 Winn 170 440 -- -- -- 3/27/2012 75.10 94.90 -- --

W-172 320541092291601 Winn 140 655 4/1/2005 100.48 39.52 3/1/2012 104.93 35.07 -4.45 -0.64

W-179 315948092300301 Winn 195 585 3/7/2005 123.81 71.19 3/1/2012 128.14 66.86 -4.33 -0.62

W-212 320444092384902 Winn 270 601 4/8/2005 221.80 48.20 3/12/2012 224.52 45.48 -2.72 -0.39

W-223 315009092534401 Winn 200 165 4/12/2005 93.14 106.86 3/14/2012 97.94 102.06 -4.80 -0.69

W-28 315527092370801 Winn 105 480 -- -- -- 3/6/2012 61.64 43.36 -- --

Wb-182 330046093283101 Webster 280 425 -- -- -- 3/26/2012 102.00 178.00 -- --

Wb-219 323220093165902 Webster 190 136 3/2/2005 5.90 184.10 4/11/2012 6.27 183.73 -0.37 -0.05

Wb-241 325938093275301 Webster 230 408 -- -- -- 3/29/2012 57.05 172.95 -- --

Wb-271 323221093140401 Webster 278 220 3/15/2005 82.73 195.27 3/28/2012 86.15 191.85 -3.42 -0.49

Wb-274 323637093172101 Webster 200 300 -- -- -- 5/2/2012 83.92 116.08 -- --

Wb-285 323553093141101 Webster 340 608 -- -- -- 4/17/2012 188.57 151.43 -- --

Wb-326 325200093151701 Webster 260 470 3/1/2005 111.98 148.02 3/26/2012 114.98 145.02 -3.00 -0.42

Wb-331 324835093250801 Webster 220 355 3/15/2005 55.67 164.33 3/28/2012 55.08 164.92 0.59 0.08

Wb-355 330008093264301 Webster 245 470 -- -- -- 4/5/2012 69.64 175.36 -- --

Wb-399 325518093221901 Webster 205 298 4/4/2005 41.93 163.07 4/5/2012 44.52 160.48 -2.59 -0.37

Wb-423 324823093165302 Webster 400 540 3/14/2005 276.46 123.54 3/19/2012 278.96 121.04 -2.50 -0.36

Wb-424 322912093110301 Webster 280 130 3/2/2005 56.82 223.18 3/28/2012 62.49 217.51 -5.67 -0.80

Wb-430 323634093172601 Webster 220 260 -- -- -- 5/2/2012 82.94 137.06 -- --

Wb-467 323540093213201 Webster 210 175 3/4/2005 36.05 173.95 4/17/2012 40.80 169.20 -4.75 -0.67

Wb-475 323533093200301 Webster 173 170 3/1/2005 14.67 158.33 3/28/2012 14.72 158.28 -0.05 -0.01

Wb-492 323739093173001 Webster 250 424 -- -- -- 5/2/2012 118.74 131.26 -- --

Wb-498 325723093273801 Webster 245 406 -- -- -- 3/29/2012 70.20 174.80 -- --

Wb-516 323533093195801 Webster 150 157 -- -- -- 3/28/2012 3.50 146.50 -- --

Wb-6694Z 323224093131201 Webster 313 280 -- -- -- 3/28/2012 122.76 190.24 -- --

References

Brantly, J.A., Seanor, R.C., and McCoy, K.L., 2002, Hydrogeology and potentiometric surface, 

October 1996, of the Sparta aquifer in northern Louisiana: U.S. Geological Survey Water-Resources 

Investigations Report 02–4053, 3 sheets.

Cushing, E.M., Boswell, E.H., Speer, P.R., Hosman, R.L., and others, 1970, Availability of water in the 

Mississippi embayment: U.S. Geological Survey Professional Paper 448–A, 13 p.

Freiwald, D.A., and Johnson, S.F., 2007, Monitoring of Sparta aquifer recovery in southern Arkansas 

and northern Louisiana, 2003–07: U.S. Geological Survey Fact Sheet 2007–3102, 4 p.

Joseph, Robert L., 1997, Potentiometric surface of the Sparta aquifer in eastern and south-central 

Arkansas and north-central Louisiana, and the Memphis Aquifer in east-central Arkansas, October 

1996–July 1997: U.S. Geological Survey Water-Resources Investigations Report 97–4282, 19 p.

Holland, T.W., 2007, Water use in Arkansas, 2005: U.S. Geological Survey Scientific Investigations 

Report 2007–5241, 32 p.

Lovelace, J.K., and Johnson, P.M., 1996, Water use in Louisiana, 1995: Louisiana Department of 

Transportation and Development Water Resources Special Report no. 11, 127 p.

Lovelace, J.K., and Lovelace, W.M., 1995, Hydrogeologic unit nomenclature and computer codes for 

aquifers and confining units in Louisiana: Louisiana Department of Transportation and Development 

Water Resources Special Report, no. 9, 12 p.

McKee, P.W., Clark, B.R., and Czarnecki, J.B., 2004, Conjunctive-use optimization model and 

sustainable-yield estimation for the Sparta aquifer of southeastern Arkansas and north-central 

Louisiana: U.S. Geological Survey Water-Resources Investigations Report 03–4231, 30 p.

McKee, P.W., and Hays, P.D., 2002, The Sparta aquifer—A sustainable water resource?: U.S. 

Geological Survey Fact Sheet 111–02, 4 p.

McWreath, H.C., III; Nelson, J.D.; and Fitzpatrick, D.J., 1991, Simulation response to pumping 

stresses in the Sparta aquifer, northern Louisiana and southern Arkansas: Louisiana Department of 

Transportation and Development Water Resources Technical Report, no. 51, 51 p.

National Oceanic and Atmospheric Administration, 2013, National climatic data center: Accessed June 

26, 2013, at http://www.ncdc.noaa.gov/cag/.

Payne, J.N., 1968, Hydrologic significance of the lithofacies of the Sparta Sand in Arkansas, Louisiana, 

Mississippi, and Texas: U.S. Geological Survey Professional Paper 569–A, p. A1–A17.

Ryals, G.N., 1980, Potentiometric surface maps of the Sparta Sand; northern Louisiana and southern 

Arkansas, 1900, 1965, 1975, and 1980: U.S. Geological Survey Open-File Report 80–1180, 1 sheet.

Sargent, B.P., 2011, Water use in Louisiana, 2010: Louisiana Department of Transportation and 

Development Water Resources Special Report no. 17, 134 p.

Schrader, T.P., 2008, Potentiometric surface in the Sparta-Memphis aquifer of the Mississippi 

Embayment, spring 2007: U.S. Geological Survey Scientific Investigations Map 3014, 1 sheet.

Smoot, C.W., and Seanor, R.C., 1991, Louisiana ground-water map no. 3: Potentiometric surface, 

1989, and water-level changes, 1980–1989, of the Sparta aquifer in north-central Louisiana: U.S. 

Geological Survey Water-Resources Investigations Report 90–4183, 2 sheets.

laf14-0648_fig07

West Monroe

Monroe

Mo-5

L-68

L-32

L-26

Cl-9

W-223

W-212

W-179

W-172

W-156

Un-86

Un-84

Un-83 Un-82

Un-79

Un-209 Un-26

Mo-86

L-219 L-152

L-137

L-117

L-113

Cl-58

Ca-51

Ca-27

Bi-76

Wb-475

Wb-467

Wb-424

Wb-423

Wb-399

Wb-331

Wb-326

Wb-271

Wb-219

W-144B

Un-206

Un-138

Un-136

Ou-443 Ou-404

Ou-402

Ou-163

Na-534

Na-519

Mo-423

Mo-350

Mo-347

Ja-149

Ja-148

Ja-147

Ja-115

Cl-224 Cl-150

Cl-149

Cl-148

Cl-136

Cl-116

Cl-111

Ca-86B

Bo-501

Bo-456

Bo-446

Bi-284 Bi-246

Bi-216

Bi-144

Bi-112

Ou-401A

EXPLANATION

Greater than 0

Water-level differences, 2005–12, in feet

Water level above top of Sparta aquifer, in feet

Water level at or below top of Sparta aquifer, in feet

0–50

50–100

100–150

150–200

Freshwater extent of the Sparta aquifer

(Smoot and Seanor, 1991)

-40 to -30

-30 to -20

-20 to -10

-10 to 0

0 to 10

10 to 20

20 to 30

30 to 40

Ruston

Minden

Hodge

Farmerville

Winnfield

WINN

SABINE

UNION

CADDO

DE SOTO

BOSSIER

NATCHITOCHES

BIENVILLE

CLAIBORNE

WEBSTER

JACKSON

MOREHOUSE

OUACHITA

RICHLAND

LINCOLN

CALDWELL RED RIVER

Bastrop

94° 93° 92°

33°

32°

0 4 8 16 MILES

0 4 8 16 KILOMETERS

Approximate down-dip limit of freshwater

Figure 7. Map showing water-level differences, 2005–12, and areas where water levels were at or below the top of the Sparta aquifer in north-central Louisiana, March–April 2012.

-45 

-25 

-5 

15 

100 35 

120 

140 

160 

180 

200 

1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 

Water level, in feet above National Geodetic Vertical Datum of 1929 (NGVD 29) 

Water level, in feet below land surface 

Year 

Well: L-26 

Screen interval: 633–686 feet

 below land surface 

Altitude of land surface: 155 feet

 above NGVD 29 

-142 

-122 

-102 

-82 

-62 

160 -42 

180 

200 

220 

240 

260 

280 

1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 

Water level, in feet above National Geodetic Vertical Datum of 1929 (NGVD 29) 

Water level, in feet below land surface 

Year 

Well: Ou-444 

Screen interval: 660–670 feet

 below land surface 

Altitude of land surface: 118 feet

 above NGVD 29 

-70 

-60 

-50 

-40 

260 -30 

270 

280 

290 

300 

1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 

Water level, in feet above National Geodetic Vertical Datum of 1929 (NGVD 29) 

Water level, in feet below land surface 

Well: Cl-149

Screen interval: 726–736 feet

 below land surface 

Altitude of land surface: 230 feet

 above NGVD 29 

Year 

Any use of trade, product, or firm names in this publication is for descriptive purposes only and 

does not imply endorsement by the U.S. Government

For sale by U.S. Geological Survey, Information Services, Box 25286, Federal Center, 

Denver, CO 80225, 1–888–ASK–USGS

Digital files available at http://dx.doi.org/10.3133/sim3313

Suggested citation: McGee, B.D., and Brantly, J.A., 2015, Potentiometric surface, 2012, and

water-level differences, 2005–12, of the Sparta Aquifer in north-central Louisiana: U.S. Geological 

Survey Scientific Investigations Map 3313, 2 sheets, http://dx.doi.org/10.3133/sim3313.

Printed on recycled paper

ISBN 978-1-4113-3905-7

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ISSN 2329-1311 (print)

ISSN 2329-132X (online)

http://dx.doi.org/10.3133/sim3313