1987-12-01_PERMIT FILE - C1981017 ‎(165)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/1/1987
• Doc Name: David E. Fleming Company Prepartation Plant Area Surface Drainage Plan
• Section_Exhibit Name: Chapter II Attachment 3 to Appendix II-B-7
• Media Type: D
• Archive: No

Soil Control
Disturbed Rainfall Erodability Length Slope Practice
Area R K LS CP
1 40 . 70 5. 0 1
lA 40 . 35 4 . 25 1
2 40 . 70 1. 7 1
Annual -Sediment Losses
Disturbed A A
Area tons/acre acre-feet/acre*
1 140. 0 . 0918
lA 59. 5 . 0390
2 47. 6 . 0312
*
1 ton x 1 x acre 2x 2000 lbs = . 000656 ac-ft
acre 70pcf 43560ft ton crc
Sediment Delivery Ratio*
From AHSDA Fig 5. 24 and 5. 25 the following Sediment
Delivery Ratios were determined.
Estimated
Disturbed Sed. Delivery Sed Delivery
Area Ratio(Theoretical) Delivery Ratio
1 . 16 . 70
lA . 50 . 70
2 . 20 . 70 ,
*This method takes into account the following factors :
surface runoff, texture of eroded mt. , percent ground
cover, slope shape, delivery distance, surface roughness
and slope gradient
Estimated annual yield of sediment delivered to ponds
Disturbed Sed Loss Sed Delivery
Area Area (Ac) (ac ft/ac) Ratio
1 11. 63 . 0918 . 70
lA 7. 23 . 0390 . 70
2 3. 49 . 0312 . 70
61