PERMFILE137988

• Permit No: C1981014
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: pages 168 to 206a
• Section_Exhibit Name: EXHIBIT 19 LOADOUT AREA PONDS AND DRAINAGE STRUCTURES
• Media Type: D
• Archive: No

Runoff Volume
• 10-year, 24-hour event 1.34 ac-ft
Sedimentolocrv
Sedimentology - Methodology and Assumptions
Sediment yield was calculated using SEDCAD+ Version 3.0. The
methodology and assumptions used are outlined in the Pond 1
section of this Exhibit.
Sedimentology - inputs
All sedimentology inputs for each subwatershed are shown on
Table 23 a, SEDCAD+ Version 3.0, Pond L1 and Perimeter Ditch.
Sedimentology - Results
A = (56.6/42.0)X(135 tons)X(2000 Ib/ton)X(1/60 Ib/ft,)X(1/43,560
ft,/ac-ft) = 0.14 ac-ft/year
• Required Storage capacity
Storage Capacity = 10-year, 24-hour runoff + sediment volume +
dead storage
= 0.61 ac-ft + 1.35 ac-ft
= 1.96 ac-ft
•
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os/is/ss 7:13pm kep 171a Revised - May 1995