GENERAL55971

• Permit No: C1981010
• IBM Index Class Name: General Documents
• Doc Date: 5/25/1983
• Doc Name: Letter on criteria to determine revegetation success with Stip 1
• From: TRAPPER MINING INC
• To: MLRD
• Permit Index Doc Type: VEGETATION
• Media Type: D
• Archive: No

Table 5.-Cos[ ca use the cemoa rf son area and hl5m ric record
e oneep[T .`or _ r,v%.:e radon ~~cess scan da rd Sa sed on cvo
e ompa risen ara.as per vu.eca[LOr. cor :unl.y ar.d one year of
hose line data m llectlor..
Cox na rl se' area oce¢~a~l NS sto ric to cord oro¢raml
Yea r2 Ac:es sco le d' ~9c^ Go 1'_.rs Cos[ At res ;a-t led 1987 Cellars Cost
3981 (0,500 S%0,900 10,500 551,100
1982 -0- -0- 10,500 48,100
1983 -0- -0- 10,500 46,100
1984 -0- -o- 10,500 46,100
1985 -p- -0- 10,500 46,100
1986 -0- -0- 10,500 46,100
1987 -p- -0- 10,500 46,100
1986 -0- -0- -0- -0-
1989 -0- -0- -D- -0-
1990 300 19,300 30G ~ 9,500
1991 ]00 29,300 300 9,500
1992 300 29,300 300 9,500
1993 300 29,300 300 9,500
1994 600 38,800 600 19,000
1995 900 48,300 900 28,500
to
2025
(1,497,300)4
(883,500)4
2026 600 38,800 600 19,000
2027 600 38,800 600 19,000
2028 600 38,800 60D 19,000
2029 600 38,800 600 19,000
2030 300 29,300 300 9,500
TOTAL $1,908,700 51,357,700
(Based on actual 1960 baseline ve getatfon survey Costs with 2 compa rtson areas per
vege[~[1on type.
Assumes that mining operations vlll begin Sn 1984, anJ that baseline ve ge tattoo
data wile ctlon begins three years prior [o scar[-up. Schedule [he entire re ve gelation
responsl bilf ty period (i. e., the life of the mine (35 yea rsj plus the bonding period
(10 yrSa rsl)•
Assumes [he operator evaluates each reclaimed area in }ear 5 of 1[s liability
period [o determine if success is likely or if remedial ire a[ment may be needed. Areas
are evaluated agal^ in years 8 and 9 of [heir lia bi llty periods.
the figure within the brackets is [he total. cosC associated vd th [he program
from year 10 to year 40, with [he annual tort of the program lmmedia[ely above.
E s[ima led Cos [s for cvo years of baseline
data and two comparison areas per plant coomun-
1ty, vc re 593,200 less than for the historic
record baseline data costs (Table 6). 6a~p11ng
mats for testing re ve gelation success 1990-?030
were estimated to be $186,250 less for [he
compa rl son area approach. 'Che total life of
project costs for [he historic record program fn
[hie lns[ance vas 593,050 less than for [he com-
parison area program.
These Chrec comparisons, hove ve r, use
constant ]990 dollars. They do not consider the
effect of when money !s spent, i.e. [he [f me
value of money. Ool lays spc ~[ early 1n the life
of a project are more costly because they can't
Dc used for alternative Inve st me n[s (Ste raole,
1974). In order [o consider this cf me value of
money, .the total program casts 1n Tables 4-6 were
rotalw laced [o dote calve [he effe c[Ive rate of
to turn [hat would result in eG ual net present
values for [he costs of the two programs. (Ta blc
7). IF [he effe cif vc rate of return Is greater
Chan [ha[ resu (Clog in equl valen[ nee present
value costs, [he comparison area program is [he
leas[ expensive. If the effective ra [e of return
is less, [he historic record program is less
expensive.
These analyses show that [he com pa rl son area
program oL,y be less costly in [hc short and long
term vi ch low to moderate of Cec[ice ra [es of
return. This is because 24S of the life of
project costs for a his[orlc record program ve re
estimated co occur in the fl rst seven years. In
Contrast, even vlth cvo years bas rune data
collection and cvo Comparison areas per plant
tonmuni~y, only 77: of the total casts occurred Ln
the first seven years of [hc compa rf son area
program.
If use of the hlsto rit record program
requt res nonl[o rf ng other pa ra me [e rs, such as
soil mols[ure, its cos[ will be even greater. A
change In the yea re of bascli ne data con ec[1 on
at [he number of comparison areas per plan[
- ']
.~_