1987-12-01_PERMIT FILE - C1981017 ‎(280)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/1/1987
• Doc Name: Process Flow Description
• Section_Exhibit Name: Chapter IV Attachment B
• 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
IA 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