1987-12-01_PERMIT FILE - C1981017 ‎(110)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/1/1987
• Doc Name: Mine Portal Areas
• Section_Exhibit Name: Chapter II Attachment 1 to Appendix II-B-7
• Media Type: D
• Archive: No

12, 1979
0437-102
Page -3-
2. :-iYDRC.LOGIC DATA cent'd
d.) Ruoff LTait Depths in Inches
C. N. 100 Yr. 25 Yr. 10 Yr.
90 1.98" 1.62" 1.09"
92 2.161" 1.79" 1.24"
93 2.25" 1.87" 1.31"
94 2.35" 1.97" 1.40"
95 2.45" 2.06" 1.11811
3. RUNOFF VOLT-"�S AIM FL0v'S
a.) Runoff Volun e
Mire Area C. N. Runoff Volime (Acre Feet)
Sub Area Acres Sq. Mile 100 Yr. 5 Yr. 10 Yr.
3-1 2.29 0.0035 90 0.38 0.31 0.21
3-2 2.57 0.0040 90 0.41 0.34 0.23
4-1 1.00 0.0031 95 0.41 0.34 0.24
4-1A 0.34 0.00053 90 0.06 0.04 0.03
4-2 0.80 0.0013 95 0.16 0.14 0.10
5-1 2.84 0.0044 90 0.48 0.38 0.26
5-2 5.16 0.0081 90 0.85 0.70 0.47
b.) Runoff Flows - Type II Storm
L
Unit
Mine Average Area Disc;-.arge Peak
Sub Area % Slope C. N. &�cres CFS,11n Discharges (LFS
100 Yr 25 Yr 10 Yr
3-1 9 90 2.29 3. 7 7.3 6 00
3-2 15 90 2. 57 6. 3 12.5 10.2 6.7
4-1 2.5 95 1.99 3.0 7.35 4. 9 3.3
4-LA 50 90 0.34 1.1 2.70 2.3 1.5
4-2 2.0 95 0.80 1.7 4.16 3. 5 2.5
5-1 8.4 90 2. 84 5.1 i0. 1 8.3 5.6
5-2 15 90 5. 16 12 25.9 ??.4 16.8
A-3
SF