PERMFILE104205

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 6/2/2006
• Section_Exhibit Name: Exhibit 66 TOC and Mine Water Control Plan
• Media Type: D
• Archive: Yes

TABLE 44E
ch and Calvert Summary
0.Year 24-Hoar Storm
•
Slope
/, Depth
feet Shape Clilvert Discharge
cfs Size
inches
17.00 0.50 V C2-12 2.04 12.00
2.00 0.69 V CZ-12A 1.16 12.00
10.00 1.18 V C2-12B 0.61 12.00
0.42 L47 V C2-13 7.12 See note
22.00 0.42 V C2-13A 0.71 24 half
2.00 0.57 V C2-13B 7.12 21.00
17.40 0.56 V C2-15 2.60 12 PVC
2220 0.57 V C2R-1 33.44 36.00
12.50 0.76 V C2R-2 47.82 36x
10.00 0.57 V C2R-3 10.96 24.00
40.00 0.46 V C2R~ 8.93 30.00
5.00 0.76 V C2R-5 0.75 18.00

5.00 0.72 V
5.00 0.65 V
9.00 0.40 V
7.00 0.46 V
1.50 0.49 V
9.00 0.74 Vim"
UL-Ytl u.s / 10.00 0.49 V
D2-10 4.53 2.00 1.10 V
D2R-1(+) 3058 320 1.12 2' T
D2R l A + 2.86 2.20 0.92 V
D2R 2 + 2.86 3420 0.74 V
D2R-2 + base 4.18 2.15 1.07 V
Berm D2R-2 + 0.67 28.00 0.50 V"
D2R-3 + 22.09 830 0.84 2' T
D2R + 2.03 5.13 0.80 V
D2R~A 10.96 11.00 0.95 V
D2R-5 0.67 2.50 0.65 V
D2R-7 0.75 12.00 0.59 V
DCW-2 + 6.66 4.00 0.96 V
DCW-4 0.62 40.00 034 4' T
DCW-5 0.23 29.00 0.46 V
NOTE: Upon constmction ofthe Sylvester Gulch ditches and prior to vegetation establishment
in ditches designed as grass-lined channels, Enkamat or other similar erosion control measure
will be used-
• =Lined with concrete or shotaete + =100-year design # = Lmed with asphalt
sa = Riprapped with competent rock ++= Berm has 2:1 and 4:1 side slopes
•'• -Sized for the 25-year, 24-hour storm
x =Flow will be diverted through two adverts installed side by side, with the tops of both culverts at the same elevation.
'See Exhrbit 51 for design information Zgrass-lined channel 'sideslopes are 3H:1 V
`sideslopes are 2.SH:1V ssideslopes are 1.SH:1V bpipe arch
plate arch
• Retired A'w. 7997 PR07; Reviad Avg /9975IIt220;
Re,sd Sept 79975Q2225; Retired Nw 19975l1t231; Revtced L7hc 19975!12235
EXHIBIT 66 Retired Sfro7998 tII:240: RerisedA7rv I9995II2258 h SII2259: Revised Slay IOOO7R86
Revved Feb 2006IR705