U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY

Prepared in cooperation with the
CAPITAL AREA GROUND WATER CONSERVATION COMMISSION

SCIENTIFIC INVESTIGATIONS MAP 2872 (Sheet 2 of 2)

Tomaszewski, D.J., and Accardo, Darren, 2004, Louisiana Ground- Water Map No. 20:
Potentiometric surface of the “2,000-foot” sand of the Baton Rouge area, Louisiana, May 2002

SMILES [>y
1 nl ee Neel |

T
5 KILOMETERS,

Base map modified from Louisiana Oil Spill Coordinator, Office of the Governor, Louisiana, Louisiana GIS CD: A Digital Map of the State, Version 2.0

EXPLANATION

FAULT -- Dashed and queried where probable. Hachures on
‘downthrown side (modified from Whiteman, 1979, pl. 6; and
McCulloh, 1991, pl. Ia-e)

POTENTIOMETRIC CONTOUR - Shows attitude at which water
level would have stood in tightly cased wells. Dashed where
approximately located. Contour interval 20 feet. Vertical
datum is NGVD 29

FLOW ARROW - Shows general direction of ground-water flow

CONTROL POINT -- Shows location and number of well used for
contouring potentiometric surface (see table 1 for water-level
data)

WELL WITH HYDROGRAPH ~ Shows location and number of

well for which a hydrograph is shown (see fig’s 3 and 4 for
hydrograph)

Area of
enlargement
Index map of the study area

Figure 6. Generalized potentiometric surface of the “2,000-foot” sand in parts of East and West Baton Rouge parish,

POTENTIOMETRIC SURFACE 91°00" 90° 00"
7 | |
. . . vey
The potentiometric surface maps (figs. 5 and 6) show the altitude at 5 "a M | S S | S S | Pp P |
which the water level would have stood in tightly cased wells screened in the a eimiecort _. sa
“2,000-foot” sand. The maps are constructed from water levels measured in May ° ot Liason an a nae SS a ees bee
2002 in 19 wells screened in the “2,000-foot” sand (table 1). The wells were not R}Legonier? Toast eanccl A ad i “7 Norwood ,
pumping when the water levels were measured. All data are on file at the USGS i 9 Oi wr-40 Weyanoke Py ls Oo Felixville 2
office in Baton Rouge. The potentiometric surface and water-level data indicate \ s %
that within the study area: ce [Wilson \
1. Water levels are lowest in and near the industrial district. Ube : Se, ee.
2. A cone of depression in the potentiometric surface exists north of the - y Mintel Te ) hy ASI T
fault in the city of Baton Rouge and the immediate area surrounding the fii%°** FELICIANA agkson OCiinton 1
. L rs hs
Wat i VAY BainsL] 40S. 0 :
3. Water levels in the “2,000-foot” sand south of the fault (wells EB-778 and pi \ * I.
WBR-111) are much higher than water levels north of the fault in and Hardwood A gaa . 5 ELENA
near the city. oot _ 7
O St. Francisville .*
Water levels are 200 ft or more below NGVD 29 (2002) north of the fault -
in parts of the city of Baton Rouge, including the industrial district (figs. 3 and
4). As a result of ground-water withdrawals, water levels in the city have
decreased and ground water generally flows toward Baton Rouge from } Sear | er
surrounding areas (shown by arrows in fig. 5). Distribution of withdrawal sites | wz \ Foe
se eine F é ) | OANventresee? «Ac Feiceon
of 0.1 Mgal/d or more in the “2,000-foot” sand in the five-parish study area is << f/ ? } /
shown in figure 1. 5 | a( oe
i @\\\ J
A comparison of the 2002 potentiometric surface with the 1990 ¢ Sted
potentiometric surface (Tomaszewski, 1996, fig. 12) indicates present (2002) } CecaP SPC
water levels generally are about 20 ft lower in much of East and West Baton } po 2 oO
Rouge Parishes north of the fault. Water levels in other parts of the study area 4 Livonify$ PC-138 al IVIN TT
LIVINGSTON
changed little. Krotz
; ; BL Denham Lente
Table 1. Water-level data used to construct the potentiometric-surface map of the 8 Springs 01 =) Livingston =
“2,000-foot” sand of the Baton Rouge area, Louisiana, May 2002 ry Walker
+—— See Figure 6
Altitude of
land Water level, Water level,
surface, in feet in feet
in feet above or above or |
Well above Date below (-) below (-) 0 20 MILES x L . Port
\Wellnumber depth NGVD29 measured landsurface NGVD 29 | 1 i f ll po i n | { \ Villa’ jvinioam
ae [aac Te \
East Baton Rouge Parish 0 20 KILOMETERS \ ( ear roo
\ a Sunshine Pairevite x
EB-90 2120 59.05 05-16-02 253.84 “194,79 Plaquemine "Fj a —~ ¢
EB-297 1940 61.00 05-22-02 -—-276.33 -215.33 | L mao 2dimams
Base map modified from Louisiana Oil Spill Coordinator, Office of the Governor, Louisiana, Louisiana GIS CD: A Digital Map of the State, Version 2.0
EB-304 1725 67.00 05-17-02 -78.63 -11.63 ARKANSAS
EB-367 2061 64.40 05-22-02 311.95 -247.55 ——P
EB-630 2253 45.00 05-23-02 -254.00 -209.00 EXDCANATION a mee
<
EB-774 2143 47.00 05-23-02 — -228.05 -181.05 ‘ . CONTROL POINT ~ Shows location and number of well used f
renee FAULT; Das and arog where rcbable, Hechies on ER B7B CONT ontourngpaterometcsrface (ee ble or war. o a
EB-778 2586 28.00 05-16-02 -18.13 9.87 McCulloh, 1991, pl. la-e) bse) r
, WELL WITH HYDROGRAPH ~ Shows location and number of
EB-874 2250 50.00 05-23-02 -270,62 -220.62 20 ne ade leat inetd peel aa vee Rade ‘a hydrograph "e shown (eee figs. 9 and 4 for
EB-878 2178 50.00 05-23-02 -—-198.87 “148.87 Dis ree age er roc conan inervel 20 or
7 sos
EB-1028 2238 40.00 05-16-02 -231.44 191.44 <== — FLOWARROW - Shows general direction of ground-water flow INDEX MAP co Louisiana, May 2002.
EB-1150 2242 57.00 05-23-02 -255.90 -198.90
EB-1280 1685 70.00 05-17-02 -145.83 -75.83 Figure 5. Generalized potentiometric surface of the “2,000-foot” sand of the Baton Rouge area, Louisiana, May 2002.
EB-1306 1763 57.00 05-17-02 -105.97 -48.97
Pointe Coupee Parish
PC-66 1530 33.00 05-3-02 -68.29 35.29
PC-138 1637 27.00 05-7-02 -48.46 -21.46 SE EECIEDIBEGES ENCES
West Baton Rouge Parish
WBR102B 2100 18.00 05-2402 16281 714481 Kazmann, R.G., 1970, The present and future ground-water supply of the Baton Rouge area: Nyman, D.J., and Fayard, L.D., 1978, Ground-water resources of Tangipahoa and St. Tammany
, : : Louisiana State University, Louisiana Water Resources Research Institute Bulletin 5, 44 p. Parishes, southeastern Louisiana: Louisiana Department of Transportation and
WBR-106 2017 22.00 05-24-02 -228.28 -206.28 Development, Office of Public Works Water Resources Technical Report no. 15, 76 p.
WBR-111 2650 25.00 05-31-02 5.90 30.90 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 Rollo, J.R., 1969, Saltwater encroachment in aquifers of the Baton Rouge area, Louisiana:
West Feliciana Parish and Development Water Resources Special Report no. 9, 12 p. Department of Conservation, Louisiana Geological Survey, and Louisiana Department of
WE-40 632 50.00 05-1-02 -12.24 37.16 Public Works Water Resources Bulletin no. 13, 45 p.

CONVERSION FACTORS, DATUMS, AND ABBREVIATED WATER-QUALITY UNIT

Multiply By To obtain
foot (ft) 0.3048 meter (m)
foot per year (ft/yr) 0.3048 meter per year (m/yr)
mile (m) 1.609 kilometer (km)
million gallons per day (Mgal/d) 3,785 cubic meter per day (m?/d)

McCulloh, R.P., 1991, Surface faults in East Baton Rouge Parish: Louisiana Geological Survey
Open-File Series 91-02, 25 p.

Meyer, R.R., and Turcan, AN., Jr., 1955, Geology and ground-water resources of the Baton
Rouge area, Louisiana: U.S. Geological Survey Water-Supply Paper 1296, 138 p.

Morgan, C.O., 1961, Ground-water conditions in the Baton Rouge area, 1954-59, with special
reference to increased pumpage: Department of Conservation, Louisiana Geological Survey,
and Louisiana Department of Public Works Water Resources Bulletin no. 2, 78 p.

Morgan, C.O., 1963, Ground-water resources of East Feliciana and West Feliciana Parishes,

Stuart, C.G., Knochenmus, Darwin, and McGee, B.D., 1994, Guide to Louisiana’s ground-water
resources: U.S. Geological Survey Water-Resources Investigations Report 94-4085, 55 p.

Tomaszewski, D.J.,1996, Distribution and movement of saltwater in aquifers in the Baton
Rouge area, Louisiana, 1990-92: Louisiana Department of Transportation and Development
Water Resources Technical Report no. 59, 44 p.

Torak, L.J., and Whiteman, C.D., Jr., 1982, Applications of digital modeling for evaluating the
ground-water resources of the “2,000-foot” sand of the Baton Rouge area, Louisiana:
Louisiana Department of Transportation and Development, Office of Public Works Water

U.S. Environmental Protection Agency, 1977, National Secondary Drinking Water Regulations:
Federal Register, March 31, 1977, v. 42, no. 62, Public Law 143, p. 17143-17147.

U.S. Environmental Protection Agency, 1992, Drinking water regulations and health advisories:
Washington, D.C., U.S. Environmental Protection Agency, Office of Water, 11 p.

Whiteman, C.D., Jr., 1979, Saltwater encroachment in the “600-foot” and ”’1,500-foot” sands of
the Baton Rouge area, Louisiana, 1966-78, including a discussion of saltwater in other sands:
Louisiana Department of Transportation and Development, Office of Public Works Water
Resources Technical Report no. 19, 49 p.

Whiteman, C.D., Jr., 1980, Measuring local subsidence with extensometers in the Baton Rouge
area, Louisiana, 1975-79: Louisiana Department of Transportation and Development, Office
of Public Works Water Resources Technical Report no. 20, 18 p.

Winner, M.D., Jr., Forbes, M.J., Jr., and Broussard, W.L., 1968, Water resources of Pointe
Coupee Parish, Louisiana: Department of Conservation, Louisiana Geological Survey, and

Vertical coordinate information in this report is referenced to the National Geodetic Vertical Datum of 1929

(NGVD 29)--a geodetic datum derived from a general adjustment of the first-order level nets of both the United States

and Canada.

Horizontal coordinate information in this report is referenced to the North American Datum of 1927.

Abbreviated water-quality unit:

milligrams per liter (mg/L)

Louisiana: Louisiana Department of Public Works, 58 p. Resources Technical Report no. 27, 87 p.

Louisiana Ground-Water Map No. 20:

Potentiometric Surface of the “2,000-foot” Sand of the
Baton Rouge Area, Louisiana, May 2002
By

D.J. Tomaszewski and Darren Accardo

2004

Louisiana Department of Public Works Water Resources Bulletin no. 11, 110 p.