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 11
F • ,t,t*~+,t,t,t**,t*,t,t*****,t**********~**,t*t*****,t,r******,r*~*~****~~***********
I RIPRAP DESIGN SUMMARY TABLE I
I *********~***,-***,r,r,e** ~*,r***,t****~***,r*,t********,r*****~~~*,r******,r~ *I
I LOCATION: CYCC ECKMAN PARK MINE I
I CHANNEL SEDIMENT POND G I
I DRAINAGE AREA (Ac): 440 I
I ~~*~***********~*~**** ~********~******************~*~**~*********** *I
I GEOMETRIC PROPERTIES I
I -------------------- I
I SLOPE: 9.00$ I
I BOTTOM WIDTH (ft): 50 I
I Z (H:1V): 4 I
I I
I ~~****~~*****~**,t****~ ****~***~,t*,r*******~**,r****************~***** *1
I HYDRAULIC PROPERTIES I
I -------------------- I
I I
I DESIGN EVENT: 100-YR~ 24-HR SPILLWAY DISCHARGE I
I DISCHARGE (cfs): 262 I
I DEPTH (ft): 0.72 I
I VELOCITY (fps): 6.84 I
I AREA (sq ft): 38.29 I
I I
I *~~*~**~******~******* ********~*****************~+*,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 13 100 I
I 50-70 11 63 I
I 35-50 7 19 I
I 2-10 2 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 = 1.1 feet -I
I CHANNEL DESIGN DEPTH: 2.0 (includes freeboard) I
I RIPRAP VOLUME (CY/LF) 2.6 I
I I

L_J

75
Water Engineering 8 Technology, Inc.