1981-11-13_PERMIT FILE - C1981013 ‎(48)‎

• Permit No: C1981013
• IBM Index Class Name: PERMIT FILE
• Doc Date: 11/13/1981
• Doc Name: Surface Water Control Design Data
• Section_Exhibit Name: Volume 2 Exhibit 16
• Media Type: D
• Archive: No

TABLE 3
MAXWELL MINE DISTURBED DRAINAGES
BASIN COEFFICIENTS TIME OF 10Y-PEAK RUNOFF
LABEL DESCRIPTION AREA LENGTH SLOPE RUNOFF RET CN CONCENT INTENS IOY-24H PEAK
ACRES FT y MIN IPH Ac-FT CFS
POND 003 DRAINAGE BASINS
003-1 GRAVEL PARKING LOT 3.3 450 1 0.50 0.e2 89 24 2.84 0.52 4.69
003-2 1 /2 GRAVEL & 112 REVEL 2.2 260 18 0.35 0.03 74 11 4. 10 0. 17 3. 15
003-3 9/ 10 GRAVEL & 1 / 10 REVEL 10.3 1080 1 0.50 0.02 89 31 2.48 1 .63 12.77
003-4 2/3 GRAVEL & 113 REVEL 6.6 370 13 0.50 0.02 88 7 4.79 1 .00 15.80
003-5 GRAVEL RAILROAD YARD 2.4 1575 2 0.50 0.02 89 33 2.42 0.38 2.90
POND 004 DRAINAGE BASINS
004-1 9/ 10 SPOILS & 1 / 10 REVEG
SPOILS LATER REVEG 9.9 360 10 0.35 0.03 75 13 3.80 0.79 13. 15
004-2 112 SPOILS & 112 REVEG
SPOILS LATER REVEG 3.4 455 15 0.35 0.03 75 12 3.94 0.27 4.68
004-3 GRAVEL RAILROAD YARD 1 . 1 880 2 0.50 0.02 89 25 2.80 0. 17 1 .54
21