PERMFILE132678

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 1/15/2002
• Doc Name: pages Exh 8-1-Exh 8-80i
• Section_Exhibit Name: Exhibit 08 Protection of the Hydrologic Balance
• Media Type: D
• Archive: Yes

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V-Ditch Design
Ditch Grade Minimum Grade Maximum Grade Peak
Min Max De th Velocit De th Velocit Flow
" C10 5.0% 50.0% Tra ezoidal Channel C-Gulch 32.32
C11 7.0% 11.0% 0.40 4.0 0.37 4.7 0.93
C12 7.0% 12.0% 0.84 6.5 0.76 8.0 6.84
C13 7.0% 11.0% 0.40 4.0 0.37 4.7 0.86
" C74 5.0% 50% Tra ezoid al Channel C-Gulch 34.50
C15 7.0°% 11.0% 0.38 3.8 0.35 4.6 0.75
C16 2.0% 5.0% 1.90 6.0 1.60 8.5 32.48
C17 7.0% 11.0% 0.46 4.4 0.42 5.1 1.33
"` C18 33% 33% 0.68 12.3 0.68 12.3 8.25
"' C19 25% 25% 0.21 4.9 0.21 4.9 0.29
C-20 7.0% 11.0% 0.40 4.0 0.37 4.7 0.93
C-21 7.0% 11.0% 0.34 3.6 0.31 4.2 0.59
C-22 7.0°~° 11.0% 0.91 6.9 0.84 8.2 8.37
C-23 7.0% 11.0% 0.94 7.0 0.87 8.4 9.13
C-24 40.0% 40.0% 0.61 12.6 0.61 15.5 6.84
" Ri ra lined tra ezoida l channel i n C-Gulch -See a es 8-17 - 8-19
"` Line w ith unnite or concrete to revent infiltration.

Ditch D1 Trapezoidal Channel -See page a-14
D2 2% 10% 1.51 5.1 1.12 9.4 17.58
E1 2% 2°I° 0.84 3.5 0.84 3.5 3.63
F1 2% 2% 0.46 2.3 0.46 2.3 0.70
F2 2% 2°I° 1.30 4.7 1.30 4.7 11.66
F3 2% 2% 1.91 6.0 1.91 6.0 32.67
G1 2% 2°f° 0.47 2.4 0.47 2.4 0.75
G2 2% 2% 0.22 1.4 0.22 1.4 0.10
Ditch SAEt 7% 11% 0.18 2.3 0.17 2.8 0.11
SAE2 2% 2% 0.30 1.8 0.30 1.8 0.22
Ditch FG1 30% 30% 0.21 5.4 0.21 5.4 0.33
Ditch GVB1 28% 28% 0.16 4.3 0.16 4.3 0.16
GVB2 17% 17% 0.15 3.2 0.15 3.2 0.11
GV83 10% 10% 0.17 2.7 0.17 2.7 0.11
GVB4 47% 47% 0.20 6.5 0.20 6.5 0.35
GVB5 35% 35% 0.18 5.2 0.18 5.2 0.25
GVB6 15% 15% 0.20 3.7 0.20 3.7 0.20
Berm alon coal stock ile ad - flow in ditches B 30, 31, 32
Hei th Velocit Hei th Velocit
1 % 2°% 1.00 2.8 0.87 3.6 4.00
Berms Freeman Gulch
2% 4% 0.34 1.9 0.30 2.5 0.33
Provide ri ra unnite or concrete lined V-Ditch as
necessa for erosion rotection.
Ditches cut in rock will not re uire erosion rotection.
Flow de ih in feet does not include 0.3 feet freeboard.
PR-O6 EXH-8 - 29i - ia2r~oi
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