_REPORT - M1977448

• Permit No: M1977448
• IBM Index Class Name: Report
• Doc Name: BLACK HOLDINGS & PA
• From: BLM
• To: PETE KILBOURNE
• Media Type: D
• Archive: No

i
I _ IDi La Sal #1 Page 10
ENVIPONMEN' [. INDEX SCORZSF1EEf
Comment
Land Surface Impacts Acres** Number Reference
W/o w w/o w W/o w
Cuts (total contour or rim strips,
I - highwalls, and dozen cuts)
Avg height x length < 1000 ft2 1 1 x 3 pts - 3 3 11
I — Avg height x length between 1000 ft2
and 2500 ft2 0 0 x 6 pts - 0 0
Avg height x length > 2500 ft2 0 0 x 10 pts - 0 0
openings (shafts, adits, etc. ) 7 8 x 2 pts - 14 16 12
Blocked drainage 1 1 x 10 pts - 10 10
Less severe disruption of a
_ natural drainage 0 0 x 4 pts - 0 0
I— W/o w
Pits (intentional depressions) 0 0 acres x 12 pts/acre - 0 0
Subsidence .1 .1 acres x 20 pts/acre - 2 2
Erosion (total area affected)
I ` Severe (rill and gully) 2 2.5 acres x 30 pts/acre - 60 75
Less severe (sheet wash/rill) 1 1.3 acres x 20 pts/acre - 20 30
Instability (total area affected
by failure of road cuts/fills,
stockpiles, dumps, etc.) .2 .2 acres x 30 pts/acre - 6 6
Stockpile/Waste dump 3 4 acres x 6 pts/acre - 18 24
= Total site area 4 acres x 2 pts/acre - 8 10 13
Land Surface Impacts Score 141 176
}_ Total volume of material in stockpile/%iastes dtm!ps - 25,000 yd3 30,000 yd3
(350L 130W 25D)(1/2)(1/27) ;(80L 60W 70D)(1/3)(1/27);(400L 40W 10D)(1/2)(1/27)
Onsite Water Quality
C
0
n
`! t
S E a
i u C m
II U 1 t h i
n t r e n
k a o m a
li n t p i t
o i h c i
w 0 i a o
n n c 1 n*
No Water 0 0 0 0 0
Artificial impoundment
< 1/2 acre and/or < 5 ft deep 1 2 4 6 0
I` > 1/2 acre and/or > 5 ft deep 1 4 6 8 0
—i Natural impoundment
< 1/2 acre and/or < 5 ft deep 1 4 6 9 0
> 1/2 acre and/or > 5 ft deep 1 6 8 10 0
I_ Stream 1 5 3 9 5 14
Intermittent stream 1 3 2 8 0
I Water flowing from mane 3 4 4 9 4
lJ Onsite Water Score 9