GENERAL40564

• Permit No: M1989065
• IBM Index Class Name: General Documents
• Doc Name: PRE MINING CONDITIONS
• Media Type: D
• Archive: No

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Table 2-2d.-Bumf[ curve numbers for grid and xmiarid rangelands' .
Curve numbers for
Cover description hydrologic soil group-
Cover type mnditiorP As B C D
Herbaceous-mixture of grsss, weeds, and Poor 80 93
low-growing brush, with brush the FaQ 71 ~
1 89
minor element. Cood GL 4 85
Oak•aspen-mountain brush mixture of oak brush, Poar 66 7 79
aspen, mountain mahogany, bitter brush, maple, Fau• 48 ~ . 63
and other brush Caad 30 41 48
Pinyon juniper-pinyon, juniper, or both; Poor 75 85 89
grass understory. Fav 58 73 80
Good 41 61 71
Sagebrush with grass unde[story. Poor 67 80 85
Fair 51 63 70
Goad 35 47 ai
Dexrt shrub-major plants include saltbush, Poor 63 77 85 88
greaxwood, amsotebush, blackbrush, bursage, Fair a5 72 Al 86
palo verde, mesquite, and cactus. Cood 49 68 79 84
'Avenge runoS condition, and I, = OYS. For range in humid regionq use table 2.2c.
'1'wr. <304 ground mver (litter, graves, and brush oven[ury}
Fair. JO to 70'~ ground mver.
(w~ul: > 70Ar ground mver.
'Cw~'e numbers fur group A have been developed only for dexrt shrub.
2$
(210-VI-TR-55, Second Ed., June 1986)