HYDRO24142

• Permit No: M1996064
• IBM Index Class Name: Hydrology
• Doc Date: 2/5/1996
• Doc Name: PHASE II DRAINAGE REPORT AND EROSION CONTROL STUDY FOR STEVENS LEASE CLAY MINE
• Media Type: D
• Archive: No

JOB NO 96.001.00 DATE 1/31/96
PROJECT Stevens Lease Clay Mine
Rip-rap-Pond Outtall
From Urban Drainage 8 Flood Control District's
Drainage Criteria Manual:
1
V *S" 7.6*.029"
V =Mean Velocity = 7.6 assuming worst case (inlet control} ~ _ ~ = 3.2
S =Channel Slope = 2.9% (SS -1) (2.5-1)'
Ss =Specific Dens'Ry =Assume minimum of 2.5
From Table 5-5, Use Type "L" (12") Rip-Rap
Use L= 10'D (max Length)
=10'.5=5 feet long
Use W= 5'D
Place rip-rap 2.5 'wide.
Minimum Depth = 1.5 ' D = 18 "deep.