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 7

I RIPRAP DESIGN SUMMARY TABLE I
I ,t~*~~**********~***~** *****~,r***,r~***,r*~*********,r~****,r,-***~,-~~x* **2
I LOCATION: CYCC ECXMAN PARK MINE I
I CHANNEL SEDIMENT POND A I
I DRAINAGE AREA (Ac): 3290 I
I ~~,t*,t,t****,t***,t**~**** ,r**,t*,t*~***,t*~,r**,r**,r****,t*,r*****~*+,r**~*xr~:rtl
2 GEOMETRIC PROPERTIES I
I -------------------- _ I
I SLOPE: 10.00% Z
I BOTTOM WIDTH (ft): 100 I
I Z (H:1V): 3 I
2 I
2 **~********,t*~,t**,t**~* ********,t**~****,r****~~*****~*~~~***~**~~x*~**I
2 HYDRAULIC PROPERTIES I
I -------------------- I
I I
2 DESIGN EVENT: 100-YR, 24-HR SPILLWAY DISCHARGE I
I DISCHARGE (cfs): 717 I
I DEPTH (ft): 0.91 I
I VELOCITY (fps): 7.71 I
I AREA (sq ft): 93.03 I
I I
I ~**~******,r****,t~~~*** *,t***~***~******~**********+t~,r**~*~~**,r**x~~**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 19 338 I
I 50-70 16 213 I
I 35-50 11 63 I
I 2-10 4 2 I
2 ---------------------- ------------------------------------- I
I I
I DESIGN SAFETY FACTOR: 1.5 I
I MULTIPLIER FOR ROUNDED ROCK: ~ 1.0 (1.4 If Rounded Rock U==_d) I
I LAYER THICKNESS (ft): (typical range 1.5-2.0 x D50) I
I Multiplier = 1.75 x D50 I
I THICKNESS = 1.6 feet I
I CHP.NNEL DESIGN DEPTH: 3.0 (includes freeboard) I
I RIPRAP VOLUME (CY/LF) 6.9 I
2 I
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