2012-06-28_PERMIT FILE - M2012032 ‎(21)‎

• Permit No: M2012032
• IBM Index Class Name: PERMIT FILE
• Doc Date: 6/28/2012
• Doc Name: Appendix 6 & 7
• Media Type: D
• Archive: No

SWB -5
Graphical Peak Discharge
Project: SWB -5 By: B Langenfeld Date: 05/23/12
Location: Revenue Checked: Date:
Developed
1. Data:
Drainage area: .................... A = 4.4050Acres
Runoff Curve Number: ............. CN = 73
Time of Concentration: ........... Tc = 0.29
Storm Type :....................... = II
Pond and swamp areas spread
10 -Yr 24 -hr Event
Runoff Curve Number and Runoff
Project: SWB -6 By: B Langenfeld Date: 05/23/12
Location: Revenue Checked: Date:
Developed
1. Runoff Curve Number (CN)
Cover description CN Soil Group Area(Acre)
Mined Land, Disturbed (Poor) 87 C 8.131
CN (weighted): 87.0
Total Area: 8.131 Acre
2. Runoff
Return Period: 10 -Year
Rainfall, P: 2.20 in
Runoff, Q: 1.0645 in
Runoff Volume: 0.7213 Acre -Ft
Revenue Mine August 2012 6 -3
throughout watershed ............... =
0.00 percent of A
0.0000 Acres
2.
Frequency ........................yr
=
100
3.
Rainfall ,P(24 - hour) ..............
in =
3.30
4.
Initial abstraction, Ia............
= 0.7397
5.
Compute Ia /P .......................
= 0.2242
6.
Unit peak discharge, qu
...... csm /in
= 630.71
7.
Runoff ,Q .........................in
= 1.0473
8.
Pond & swap adjustment
factor .... Fp
= 1.00
9.
Peak Discharge,gp ...............cfs
= 4.5464
10 -Yr 24 -hr Event
Runoff Curve Number and Runoff
Project: SWB -6 By: B Langenfeld Date: 05/23/12
Location: Revenue Checked: Date:
Developed
1. Runoff Curve Number (CN)
Cover description CN Soil Group Area(Acre)
Mined Land, Disturbed (Poor) 87 C 8.131
CN (weighted): 87.0
Total Area: 8.131 Acre
2. Runoff
Return Period: 10 -Year
Rainfall, P: 2.20 in
Runoff, Q: 1.0645 in
Runoff Volume: 0.7213 Acre -Ft
Revenue Mine August 2012 6 -3