6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

6

31

1

36

Elk

Creek

Boxelder

Creek

Rapid

Canyon

Lake

Creek

Creek

Spring

Creek

Elk

R. 6 E.

R. 5 E.

R. 7 E.

R. 8 E.

T. 5 N.

T. 4 N.

T. 4 N.

T. 3 N.

T. 3 N.

T. 2 N.

T. 1 N.

T. 1 S.

T. 2 S.

T. 2 N.

T. 1 N.

T. 1 S.

T. 2 S.

R. 9 E. R. 8 E. R. 7 E.

44o00'

44o10'

44o20'

103o15'

103o00'

103o00'

103o15'

44o00'

44o10'

44o20'

103o30'

103o30'

Deadwood Ave. Springs 2

Deadwood Ave. Springs 1

Elk Creek Springs

Boxelder Creek Springs Gravel Spring

Doty

Spring

Dome

Spring

Jackson-Cleghorn Springs

City Springs

Tittle

Springs

4,000

4,100

4,100

4,000

3,900

4,200

4,300

4,200

4,100

4,0

0

0

3,900

3,800

3,900

3,800

3,700

3,600

3,500

3,600

3,000

3,700

3,420

3,420

3,420

3,500

3,400

3,300

3,200

3,100

3,000

2,900

2,800

2,700

2,600

2,500

2,500

2,600

2,700

2,800

2,900

3,000

3,100

3,200

3,300

3,4

00

3,500

3,7

3,600

00

3,800

3,900

3,000

3,621(1)

3,655(2)

3,603(3)

3,341(4)

3,854(5)

4,340(6)

3,511(9) 2,687(10)

3,895(11) 3,450(12)

3,448(13)

3,973(16) 3,808(15)

3,774(19) ?(20)

3,660(25) 3,423(26)

3,528(27)

3,645(28) 3,536(29)

2,575(30)

3,481(31)

3,451(33)

3,646(34) 3,447(35) 3,424(36)

3,477(37)

3,734(38) 3,520(40)

3,405(41) 3,430(42) 3,417(43)

3,405(45)

3,423(46) 3,146(47)

3,418(48) 3,415(49)

3,418(50)

2,655(51)

3,418(52)

3,418(53) 3,417(54)

3,416(60) 3,426(61) 3,423(62)

3,445(63)

3,475(64)

3,806(65)

3,531(66)

3,626(67)

3,497(68)

3,594(69)

3,498(71)

3,488(72)

3,498(73)

3,515(74)

3,509(75)

3,530(76)

3,542(77)

4,280(8)

3,913(21)

3,772(23) 3,876(24)

3,444(32)

3,874(18)

3,415(57)

3,419(56)

3,580(70)

3,981(14)

3,438(58)

3,434(59)

3,976(17)

3,980(22)

3,428(44)

4,280(7)

3,764(39)

3,419(55)

3,509(75)

3,423(46)

C'

C

B'

B

A'

A

D'

D

E'

E

F'

F

G'

G

H'

H

A A'

Planimetric base from U.S. Geological Survey digital data,

1:100,000: Rapid City and Mount Rushmore, 1977

UniversalTransverse Mercator projection, zone 13

North American Horizontal Datum 1927

U.S. DEPARTMENT OF THE INTERIOR WATER-RESOURCES INVESTIGATIONS REPORT 02-4185

—PLATE 1 U.S. GEOLOGICAL SURVEY Average potentiometric surface of the Madison aquifer

PREPARED IN COOPERATION WITH THE

CITY OF RAPID CITY

Long and Putnam, 2002, Flow-System Analysis of the Madison and Minnelusa Aquifers

in the Rapid City Area, South Dakota--Conceptural Model

By

Andrew J. Long and Larry D. Putnam

2002

Average Potentiometric Surface of the Madison Aquifer for Water Years 1988-97

Printed on recycled paper

SCALE 1:100,000

NATIONAL GEODETIC VERTICAL DATUM OF 1929

2 1 0

2 1 0 2 4

2 4 6 MILES

6 KILOMETERS

Fault—Dashed where approximated, dotted where concealed.

Bar and ball on downthrown side

Outcrop of Madison hydrogeologic unit—Includes areas

where overlain by surficial deposits (modified from

Strobel and others, 1999)

Unsaturated area (part of hydrogeologic unit where water

table does not exist)

Confined area of the Madison aquifer

Madison aquifer unconfined (water table) area—Aquifer

is assumed to be contained in the upper 150 feet of the

Madison Limestone

Unconfined (water table) area of the Madison

confining unit

Anticline—Showing trace of axial plane and direction of plunge.

Dashed where approximated, dotted where concealed

Syncline—Showing trace of axial plane and direction of plunge.

Dashed where approximated, dotted where concealed

Monocline—Showing trace of axial plane. Dashed where

approximated, dotted where concealed

Potentiometric contour of Madison aquifer—Shows altitude

at which water would have stood in tightly cased, nonpumping

well. Contour interval 100 feet. Dashed where inferred.

Datum is sea level

Potentiometric contour of Madison aquifer (supplemental)—

Shows altitude at which water would have stood in tightly cased,

nonpumping well. Dashed where inferred. Datum is sea level

Potentiometric contour of the unconfined (water table) area of

the Madison confining unit—Shows altitude at which water

would have stood in tightly cased, nonpumping well. Contour

interval 100 feet. Dashed where inferred. Datum is sea level

Water well—Number shows average hydraulic head1 for water

years 1988-97 in feet above sea level. Number in parentheses

is site number (table 28)

Continuous-record observation well—Number shows average

hydraulic head1 for water years 1988-97 in feet above sea level.

Number in parentheses is site number (table 28)

1 Adjusted up if measurement was made during a dry period based on continuous-record

observation wells. Adjusted down if measurement was made during a wet period.

Spring

Line of hydrogeologic section shown in figure 22

EXPLANATION