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GEO ECHNICAL INVESTIGATION
<br />LOG ,WEXPLORATORY HOLES
<br />RADO COAL MINEk,'(
<br />Chen and associates, inc.
<br />CONSULTING ENGINEERS
<br />96 5. ZUNI DENVER, CO. 50227
<br />Job Numb6r Do U.
<br />20,932 NOV. 7980 F'9. A_6
<br />4 -81 -47-
<br />Hole
<br />S -22
<br />(Topography)
<br />(Topography)
<br />—
<br />LEGEND;
<br />Undisturbed drive sample. The symbol 30/12 indicates that
<br />30 blows of a 140 -pound hammer falling 30 inches were
<br />required to drive the sampler 12 inches,
<br />5850
<br />5850
<br />®
<br />Topsoil,
<br />`
<br />Standard Split Spoon Sample,
<br />ti
<br />®
<br />Fill -pad for drill rig -sand, silt,
<br />�'=
<br />5845
<br />100 /1 �
<br />5845
<br />Sample location,
<br />�l
<br />�
<br />©
<br />Clay (CL) silty, fine sand, angular gravel rock fragments,
<br />r
<br />Approximate
<br />very stiff, slightly moist, light brown,
<br />}
<br />Indicates practical rig refusal,
<br />Building
<br />Pad Elevation
<br />Silt (ML), fine sand, clayey, scattered angular gravel
<br />5840
<br />50 /t
<br />5840
<br />®
<br />rock fragments, very stiff, dry, light brown.
<br />m
<br />Indicates test hole advanced with NX diamond core,
<br />. %•
<br />68
<br />Silt (ML) sandy and sand (S11) silty, clayey, scattered
<br />69°1 indicates RQD, 89 indicates percentage of core recovered,
<br />.,
<br />angular gravel, very stiff, dry to light moist, light
<br />I
<br />brown,
<br />50/1
<br />UL
<br />Gravel (GM) silty, angular, hard, dry,
<br />Undisturbed thin wall sample hydraulic pressed into soil,
<br />c
<br />5835
<br />5835
<br />o
<br />c
<br />NOTES:
<br />m
<br />0
<br />ID
<br />o
<br />Sand and gravel (SM/GM), silty, some cobbles, angular
<br />1.
<br />The information presented on these figures should not be
<br />w
<br />w
<br />o
<br />rock fragments, dense to
<br />a t d very dense dry.
<br />utilized without reading the accompanying report,
<br />5830
<br />70/3
<br />5830
<br />2,
<br />Test holes were drilled September. 9 through 20, 1980
<br />7o/6
<br />©
<br />Underclay and overclay, carbonaceous to very carbon-
<br />with a 4 -inch diameter continuous flight power auger,
<br />aceous clay, moist to very moist,
<br />rotary rock bit and NX core,
<br />3.
<br />Test borings, elevations and locations were provided by
<br />®
<br />Claystone -silty to very silty, carbonaceous to very
<br />Ford, Bacon and Davis Utah, Inc. The elevation of
<br />5825
<br />75/2
<br />5 825
<br />carbonaceous near coal beds, gray to black.
<br />Test hole 22 was obtained from topography provided,
<br />4,
<br />WC - Water Content M;
<br />®Sandstone
<br />- Claystone- interbedded, fine grained, light
<br />DD - Dry Density (pcf);
<br />to medium gray.
<br />-200 - Percent Passing No, 200 Sieve;
<br />LL - Liquid Limit (;;);
<br />5820
<br />80 /iq
<br />5820
<br />Sandstone, fine grained, silty, well cemented, thick
<br />P1 - Plasticity Index M;
<br />UA - Uniaxial Compressive Strength (psi);
<br />bedded,
<br />WSS IN Water Soluble Sulfates (7);
<br />pH - pH;
<br />®
<br />Siltstone -fine grained, clayey, gray to black,
<br />K IN Permeability (cm/sec);
<br />PL - Unconfined Compressive Strength Based on
<br />Point Load Test (psi)
<br />Coal- fractured, blocky,
<br />IIIIIIIIIIIIIIIIIIII
<br />003644
<br />GEO ECHNICAL INVESTIGATION
<br />LOG ,WEXPLORATORY HOLES
<br />RADO COAL MINEk,'(
<br />Chen and associates, inc.
<br />CONSULTING ENGINEERS
<br />96 5. ZUNI DENVER, CO. 50227
<br />Job Numb6r Do U.
<br />20,932 NOV. 7980 F'9. A_6
<br />
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