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 9
~ • ~~****~*****~,t****~*~**~***********~:t*****~,r~*~,t*******~*~*********,r**
I RIPRAP DESIGN SUMMARY TABLE I
I ****~******~****~**~** **~*******~**+*~***~*****~*~****~*****,r****** ~I
2 LOCATION: CYCC ECKMAN PARK MINE Z
I CHANNEL SEDIMENT POD"D D - CHANNEL ALONG HAUL ROAD Z
I DRAINAGE AREA (Ac): 918 I
I *~**~*~~****~********* ,r*~**~#****~t~****~****,t*,r***************:r*** *I
I GEOMETRIC PROPERTIES I
I -------------------- I
I SLOPE: 3.00% I
I BOTTOM WIDTH (ft): 17 I
I 2 (H:1V): 4 I
I I
I **~,t*******~******~*** *~~~~*******t*~~**,r**~***,r*~~**~,r~**~******** ~I
I HYDRAULIC PROPERTIES I
I -------------------- I
I I
I DESIGN EVENT: 100-YR, 24-~ SPILLWAY DISCHARGE I
I DISCHARGE (cfs): 286 I
I DEPTH (ft): 1.62 I
I VELOCITY (fps): 7.53 I
I AREA (sq ft): 38.01 I
I I
I ~***,r***************** *****t***~~**~**************~++~*+r********~** *I

. I
I RIPRAP DESIGN CRITERIA
----------------------
- I
I
I I
I PERCENT FINER SPHERICAL STONE I
I BY WEIGHT DIAM. WEIGHT I
. I (in) (lbs) I
I ---------------------- ------------------------------------- I
I 100 15 159 I
I 50-70 13 100 I
I 35-50 8 30 I
I 2-10 3 1 I
I ---------------------- ------------------------------------- I
I I
I DESIGN SAFETY FACTOR: 1.5 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 = 1.2 feet •I
I CHANNEL DESIGN DEPTH: 2.0 (includes freeboard) I
I RIPRAP VOLUME (CY/LF) 1.5 I
I I

•
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