2021-12-29_PERMIT FILE - M2021009 ‎(2)‎

• Permit No: M2021009
• IBM Index Class Name: Permit File
• Doc Date: 12/29/2021
• Doc Name Note: Appendix 4 - Hyrdrology
• Doc Name: Adequacy Review Response
• From: Lewicki & Associates/Young Ranch Resource, LLC
• To: DRMS
• Email Name: AME
• Email Name: MAC
• Media Type: D
• Archive: No

Change in Drainage Direction Area
Sum of Area (acres) North South Total
Pre-Mine 313.3 188.4 501.7
Post Mine 327 174.9 501.9
Mine 327 174.9 501.9
Total 967.3 538.2 1505.5
Pre-Mining Runoff Values
Basin Curve Total 100-YR Total Area Sum 100-YR Peak
Number Runoff(ac-ft) (acres) Discharge(cfs)
1 79 12.4 64.0 233
2 79 2.9 15.1 55
3 79 12.2 63.0 229
4 79 5.6 29.1 106
5 79 3.3 17.2 63
6 79 6.5 33.3 121
7 70 6.2 45.3 115
8 70 1.3 9.3 24
9 70 8.7 63.9 163
10 70 1.4 10.0 25
11 70 7.5 55.3 141
12 70 2.3 16.9 43
13 70 10.8 79.3 202