PERMFILE130375

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 08h HYDROLOGIC EVALUATION OF SEDIMENTATION PONDS A, D AND G
• Media Type: D
• Archive: No

Table B
• *********,r**,r******,r*****,r******~***~,r~,t*t~~**~*~~~~~*****~*~*~**~**~**
I RIPRAP DESIGN SUMMARY TABLE 2
I **~***~*****~***~~*****~*****************+****f~**~*****~*~*~*******I
I LOCATION: CYCC ECKMAN PARK MINE 2
I CHANNEL SEDIMENT POND D I
2 DRAINAGE AREA (Ac): 918 I
2 ~**********,r~,r*****~****~**********~******,r~~*~~,r*******~~******~~* *i
I GEOMETRIC PROPERTIES I
I -------------------- 2
I SLOPE: 3.00% 1
I BOTTOM WIDTH (ft): 90 I
2 Z (H:1V): 4 I
I I

2 HYDRAULIC PROPERTIES I
I -------------------- I
I I
I DESIGN EVENT: 100-YR, 24-HR SPILLWAY DISCHARGE I
I DISCHARGE (cfs): 286 I
I DEPTH (ft): 1.00 I
I VELOCITY (fps): 3.04 I
I AREA (sq ft): 94.02 I
I I
2 ***********~*********~* ************,r**~**+~***~*****~***********~** *I
I
I RIPRAP DESIGN CRITERIA-
---------------------- I
I
I I
I PERCENT FINER SPHERICAL STC'.~E I
I BY WEIGHT DIAM. WEIGiiT I
I (in) (lb=) I
I ----------------------- ------------------------------------ I
I 100 11 58 I
I 50-70 9 37 I
I 35-50 6 11 I
I 2-10 2 0 I
I ----------------------- ------------------------------------ I
I I
I DESIGN SAFETY FACTOR: 2.8 I
I MULTIPLIER FOR ROUNDED ROCK: 1.0 (1.4 If Rounded Rock Used) I
I LAYER THICKNESS (ft): (typical range 1.5-2.0 x D50) I
I Multiplier = 1.75 x D50 I
I THICKNESS = 0.9 feet .I
I CHANNEL DESIGN DEPTH: 2.0 (includes freeboard) I
I RIPRAP VOLUME (CY/LF) 3.5 I
I I

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