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

Creek

Creek

Spring

Creek

Elk

Canyon

Lake

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

3,500

3,700

3,800

3,500

3,500

3,600

3,600

3,500

3,500

3,50

0

3,40

0

3,300

3,200

3,100

3,000

2,900

2,800

2,700

2,700

2,800

2,900

3,000

3,100

3,200

3,300

3,400

3,500

3,600

2,600

3,547(276)

3,429(261)

3,454(102) 3,564(103)

3,515(105)

3,593(107)

3,532(109)

3,428(112)

3,412(116)

3,510(118) 3,478(119)

3,526(120)

3,490(121) 3,481(124)

3,414(125) 3,414(126)

3,547(129) 3,581(130) 3,489(131)

3,458(132)

3,268(133)

3,414(134)

3,474(143) 3,495(135)

3,366(138) 3,476(140)

3,471(144)

3,413(148) 3,460(150)

3,454(154) 3,413(155)

3,403(156)

3,496(159) 3,438(160)

3,463(164)

3,487(166)

3,440(168)

3,432(170)

3,489(171)

3,379(174)

3,386(176)

3,414(179) 3,410(180)

3,313(183)

3,409(184)

3,400(187) 3,420(188)

3,419(191) 3,383(189)

3,336(194)

3,438(199) 3,328(205)

3,467(206) 3 3,450(207) ,416(208)

3,471(211) 3,462(212)

3,406(215) 3,450(217)

3,435(220)

3,400(224)

3,382(225)

3,435(226) 3,360(228)

3,360(229) 3 3,396(230) ,395(231) 3,365(232)

3,383(233) 3,360(234)

3,378(236)

3,364(240) 3,353(237) 3,370(241)

3,374(249) 3,351(250)

3,381(252)

3,388(254)

3,401(255)

3,392(257)

3,429(259)

3,412(260)

3,429(261)

3,376(262)

3,456(263)

3,475(265) 3,459(266) 3,412(267)

3,404(271)

3,493(272)

3,476(273)

3,539(274)

3,548(275) 3,547(276)

3,558(277)

3,527(278)

3,551(279)

3,536(280) 3,511(281)

3,422(113)

3,423(158)

3,492(161)

3,414(195)

3,557(110)

3,514(111)

3,486(114)

3,530(122)

3,457(127) 3,454(128)

3,445(145)

3,459(147)

3,418(151) 3,466(152)

3,453(153)

3,450(163) 3,443(165)

3,423(169)

3,392(175)

3,403(178)

3,422(181)

3,412(185)

3,434(186)

3,427(193)

3,410(197)

3,468(202)

3,406(210)

3,434(214) 3,403(213)

3,396(219) 3,470(222)

3,392(223)

3,456(227)

3,399(239) 3,355(244) 3,350(242) 3,336(245) 3,342(247) 3,386(248) 3,387(251)

3,372(253)

3,409(256)

3,390(258)

3,455(264)

3,499(268)

3,449(141)

3,608(104)

3,592(106)

3,529(108)

3,527(115)

3,506(117)

3,528(123)

3,415(149)

3,472(162)

3,447(172)

3,419(190)

3,450(200) 3,769(204) 3,553(203)

3,475(216)

3,415(221)

3380(243)

3,494(269)

3,477(136)

3,449(196)

3,483(137) 3,458(139)

3,444(142)

3,451(146)

3,423(157)

3,474(167)

3,416(173)

3,462(177)

3,449(182)

3,421(192)

3,443(198)

3,444(201)

3,402(209)

3,450(218)

3,435(235)

3,353(238)

3,450(246)

3,455(270)

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 2 U.S. GEOLOGICAL SURVEY Average potentiometric surface of the Minnelusa 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 Minnelusa 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 Minnelusa hydrogeologic unit—Includes

areas where overlain by surfacial deposits (modified

from Strobel and others, 1999)

Confined area of the Minnelusa aquifer

Minnelusa aquifer unconfined (water table) area—

Aquifer is assumed to be contained in the upper

250 feet of the Minnelusa hydrogeologic unit

Unconfined (water table) area of the Minnelusa

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 Minnelusa 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 the unconfined (water table) area of

the Minnelusa confining unit—Shows altitude at which water

would have stood in tightly cased, nonpumping well. Contour

interval 100 feet. 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 29)

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 29)

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

Unsaturated area (part of hydrogeologic unit where water

table does not exist)