i sw

457%
(WOLF MOUNTAIN LOOKOUT)

UNITED STATES

SPRING CREEK RANCH QUADRANGLE

DEPARTMENT OF THE INTERIOR MONTANA-BIG HORN CO.

GEOLOGICAL SURVEY 7.5 MINUTE SERIES (TOPOGRAPHIC)

107°

26

‘
Nee
ws
Pi OPEN FILE REPORT 79-777
& PLATE 12 OF 13
¢
ep an? OPEN-FILE REPORT

This report has not been edited for conformity with
US. Geological Survey editorial standards or
stratigraphic nomenclature.

35

EXPLANATION

WA

NON-FEDERAL COAL LAND—Land for which the
Federal Government does not own the coal rights.

a oe

STRIPPING-LIMIT LINE—Boundary for surface mining
of the coal bed (in this quadrangle, the 500-foot
overburden isopach). Arrows point toward the area
suitable for surface mining. Recovery factor of 85 per-
cent within that area of this quadrangle.

a

BOUNDARY OF COAL 5 FEET OR MORE THICK—
Drawn along the outerop of coal bed and/or the inferred

Yi yy
UE ay Hyg yy
Uy
4 4 iy

\
\N\\

yyy

contact between burned and unburned coal, and/or the
5-foot coal isopach. Arrows point toward area of coal
5 feet or more thick.

+
POINT OF MEASUREMENT ON COAL BED

yi
yy i
Yj Ye
Yj Wy a4 YE,
7

iy
Uys Wee Uig f

Ss
-

i = 2 = oS
s SEN ee SS = SESSA SVEN =: ~ Res Se
<: SESS Ve SS RN SSS SS ASSESS SSS
REN SES NS = SSN : . SENS . 5
> SNS Nh SN xs SN SSSeasse =.
oe Sat = | SS eee SO a <y eS x ss “
SV Ss = ~ x SS SS . S
= Se a , NSS os a S
} eon 4 : SS
Se WK = S 4 SS RN SESS } SS
SS a . : SSS SSS Nase SS 8S ssa
SS RRS SS . SSRs . SSREESS St STK Se
fs SS = S ISS 3 a Se
es SS SNS » : = fs Se S S
SSK : : SAN SSS
SS SS SSS >» < S: iS = <e Ss ~: S =
= S ~ SS SS & : = i
= Ss Soe S ies

SS

S

DIAGRAM SHOWING COMPONENT AREAS OF
IDENTIFIED COAL RESOURCES—Shows arcuate
boundary lines enclosing areas of measured, indicated,

and inferred coal resources. Boundaries of areas are
dashed where projected from an adjacent quadrangle.
Areas of measured, indicated, or inferred resources
may be present on this map without their outer
boundaries being shown.

RB R(85%)

— - (Measured resources)
13.77 W741 (Indicated resources)
1.63 1.38 (Inferred resources)

IDENTIFIED COAL RESOURCES-—Showing totals for
Reserve Base (RB) and Reserves (R). in millions of short
tons, for each section or part(s) of a section of Federal
coal land within the stripping-limit line. Dash indicates
no resources in that category. Reserve Base (RB) X the
Recovery Factor (85 percent) = Reserves (R).

, oe ee
Gi Ye ye iy
emmmaamaan ee y ae of EG, i ME gE ae BGs i RB
i Wie be eg j Ged 2 i 41 (Indicated
Ly | LL .- S soo
ty Lyne UY, Yj Uy Ys 5 / | Yi Yi, ey Hy Wey yes — im | eee IDENTIFIED COAL RESOURCES—Showing totals for
Yip Yy Liye Lif Y ty Yj, yy MOLE, Yh = = | Reserve Base (RB), in millions of short tons, for each
is YH i Yj ty ty iy, yes ‘ ay section or part(s) of a section of Federal coal land outside
Mie CN LU Zi f LL ee aap, : = the stripping-limit line. Dash indicates no resources in
es // Ys Seat Ye ENG RR RI 7; ai — LE 16.31___13.87 dab aaheengy.
yy yy Yj y vy Wy YY y a Yj t q RB RB est
Y yy ; Yi ] Y ye = Se} = = = NOTE: Recovery factors have not been established for
75 Cae a fi LE cf SILLS: [ y Ly - “ ‘ wt coal in thi 2
*oro7'a0" cam c= oe E. +. cam (BAR V RANCH NE) — aa ALAA ZA 3 om na del Therefore eserves (Rt) were nt calelated for theca
& Base map from U.S. Geological Survey, 1967 , Siar i eaeee Caetienic eat Pa = tact asain a
es 2 0 1 MILE %
or aoe Ln a a a ee oe ie To ome short tons to metric tons, multiply short tons by
—_ = — 1 KILOMETER ge ° ‘

ister
276 MILS
MILs
UTM GRID AND 1967 MAGNETIC NORTH
DECLINATION AT CENTER OF SHEET

QUADRANGLE LOCATION

COAL RESOURCE OCCURRENCE MAP OF THE SPRING CREEK RANCH
QUADRANGLE BIG HORN COUNTY, MONTANA

BY COLORADO SCHOOL OF MINES RESEARCH INSTITUTE
1979

ie
To convert feet to meters, multiply feet by 0.3048.

To convert miles to kilometers, multiply miles by 1.61.

PLATE 12

AREAL DISTRIBUTION AND TONNAGE
MAP OF IDENTIFIED RESOURCES.
OF THE WALL COAL BED