A'

B'

B

T.6S.

R. 1 E.

TOPSOIL REMOVAL BOUNDARY

BLOCKING DIKE

TOPSOIL STOCKPILE

OVERBURDEN STOCKPILE

E. 1022000

E. 1022000

E. 1022200

E. 1022200

N. 4

4480

0

N. 4

4480

0

N. 4

4500

0

N. 4

4500

0

N. 4

4520

0

N. 4

4520

0

N. 4

4540

0

N. 4

4540

0

N. 4

4560

0

N. 4

4560

0

3650

3650

3660

3650

3670

36603670

3650

3650

3650

2+00

3+00

4+00

5+00

6+00

7+00

7+42

0+000+00

1+00

3660

36503650

3660

DIVERSION

EXISTING GROUND

SECTION A-A' DIVERSION PROFILESCALE: HORZ. 1" = 50', VERT. 1" = 10'

0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+503640

3650

3660

3670

3640

3650

3660

3670

S = 0.0066 ft/ft

AR Sn1.49 2/3

Q =

2-yr, 6-hr

1.66 ft4.79 fps1.30 ft25.49 ftWP =

Yn =V =R =

n =

b =S =

15 ft

0.0300.0066 ft/ft

33.13 ftQ = 158.8 cfs A =

1/2

DIVERSION CROSS SECTION

100-yr, 24-hr

4.20 ft7.98 fps2.79 ft41.59 ftWP =

Yn =V =R =

n =

b =S =

15 ft

0.0300.0066 ft/ft

116.08 ftQ = 926.4 cfs A =2 2

NOTE: RUNOFF VOLUMES AND PEAK INFLOWS WERE COMPUTED BY THE HEC-HMS COMPUTER PROGRAM USING THE SCS TYPE II RAINFALL DISTRIBUTION.

HYDROLOGIC DESIGN STORM CALCULATIONS100-YR, 24-HR STORM

RUNOFFVOLUME

(ac-ft)(cfs)INFLOW

PEAK100-YR, 24-HRPRECIP.

(in)

2-YR, 6-HRVOLUME

DRAINAGEAREA

(sq-mi)

CURVENO.(CN)

PRECIP.(in)

PEAKINFLOW

(cfs)

RUNOFF

(ac-ft)

WATERSHEDLAG TIME

(Min)

2-YR, 6-HR STORMDRAINAGE BASIN PARAMETERS

86.60.537 78 37.14 117.0 14.11.45 4.8 534.9

23.30.172 78 19.00 21.0 1.91.45 4.8 228.1

39.80.285 79 27.37 31.4 3.61.45 4.8 314.6

SWSNO.

3-1

3-2

3-3

0.30.002 78 5.75 0.5 0.01.45 4.8 4.4

TOTAL

0.40.003 78 6.63 0.7 0.01.45 4.8 6.33-4

3-5

150.40.715 - - 158.8 19.71.45 4.8 926.4

CROSS SECTION B-B'SCALE: HORZ. 1" = 50', VERT. 1" = 10'

DIVERSION

EXISTING GROUND

15.0'

2-YR 1.66 ft

100-YR 4.20 ft

0+00 0+50 1+00 1+50 2+003640

3650

3660

3670

3640

3650

3660

3670

BLOCKING DIKE CROSS SECTIONNOT TO SCALE

EXISTING GROUND

FINISHED GROUND15.0'

1

3 3

1

R. 1 E.

T.6S.

3630

3640

3940

3930

3930

3920

3920

3910

3910

3910

3900

3900

3900

3890

3890

3890

3880

3880

3870

3870

3860

3860

3850

3850

3850

3840

3840

3840

3830

3830

3830

3820

3820

3820

3810

3810

3810

3800

3800

3800

3800

3790

3790

3790

3790

3780

3780

3780

3780

3770

3770

3770

3760

3760

3760

3750

3750

3750

3650

3660

3670

3670

3680

3680

3690

3690

3690 3690

3700

3700

3700

3710

3710

3710

3710

3720

3720

3720

3720

3720

3730

3730

3730

3730

3730

3730

3740

3740

3740

3740

3740

SWS 3-5

SWS 3-1

SWS 3-2

SWS 3-4

T.6S.

R. 1 E.

OREBODY

E. 1020000

E. 1020000

E. 1022000

E. 1022000

E. 1024000

E. 1024000

E. 1026000

E. 1026000N

. 446

000

N. 4

4600

0

N. 4

4800

0

N. 4

4800

0

N. 4

5000

0

N. 4

5000

0

SWS 3-3

DIVERSION NO. 3

RAILROAD

ORE BODY

COUNTY ROAD

LEGEND

SITE PLANSCALE: 1" = 50'

N

DRAINAGE AREASCALE: 1" = 500'

Diversion No. 3

PREPARER

SIGNATURE OF PREPARER

DRAWN

CAD FILE

PDF FILE

PLOT DATE DATEIf this bar does notmeasure 1 inch this mapis not at its original scale

CHECK SCALES

REVISIONSDATECHECKEDDRAWN# APPROVED

CONSULTANT

REF

COORDS

Dewey-Burdock Project

DALE E. BROWN

DAVE C. JOHNSON

K:\Powertech\11270\DWGS\DIV_3_EXHIBIT.dwg

27 September 201227 September 2012

NAD 27, South Dakota State Plane South (feet)

K:\Powertech\11270\DWGS\DIV_3_EXHIBIT.dwg 9/27/2012 11:06:01 AM dcjoh

Plate 5.3-11

This plate is provided to fulfill the requirements of ARSD 74:29:02:11(9).