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X
<br />Dep AP
<br />T6
<br />ro?
<br />: - °o •C 7600
<br />-.s 16e0
<br />. •: L 5s:p
<br />ro.•o ?� �5p;0
<br />1 p� ,'ffl 'O
<br />iJ
<br />• 0:;!4 :• ...Mi
<br />VkOF
<br />o:•o� ' , ••' •SAND ° ..y- r-- :,gAN� R�
<br />CONTORTED COAL• U C
<br />EXPOSED
<br />0 . � t'Q�j .:'��• 'mss, ` ' �•
<br />3
<br />a
<br />CONTORTED COAL _ _
<br />/AND SHALE EXPOSED -- _ - -- 850 724o
<br />(> 100
<br />-DH -78 -2A 7200 i
<br />"• __ ( >104) i
<br />`•:6_a X520 ; ��G� ;;�0`DGKQ 71� /
<br />�o.., • °.•o .e� Q ° °5P J� •'. •... •o. .J _ 7160_
<br />140
<br />�O 112
<br />'0;, :• °�Or'GµQ. :�' ..• • . •...: ' ' a :° , 7100 �
<br />Y•ir ti O �� �• •• •r•y. f� • .l'* .0
<br />OB 0
<br />d ( •
<br />TOAO
<br />. 4
<br />e t • •• ` •.• j 12.9) r. .. �.. r. o.e. •: ..
<br />�T P -
<br />(>13J
<br />P11 DH-85
<br />0
<br />.o,
<br />O
<br />'., :..Oaf t'� •• ?..,�•. f.f SM -I
<br />SEEPS ' • :. • },.,.., o: --.� � �
<br />DH 4C
<br />Sm• •1 • • : ••' • • . ••• • • • ••' d. '.
<br />�i
<br />NOTES
<br />OyF.e
<br />OeF,e
<br />C fl
<br />° (44)
<br />06le
<br />y
<br />DH
<br />�iir•y.SEEP
<br />1C 1p20
<br />1) Borings in the vicinity of East Roatcap
<br />Creek indicate that well- sorted, sandy
<br />alluvium is present at least 80 feet from
<br />the center of the drainage. Such allu-
<br />vium is obscured by colluvium (see TP -3,
<br />Sheet 3).
<br />2) Landslides east of East Roatcap Creek are
<br />attributed in part to road construction.
<br />3) Pediment gravels in the site vicinity are
<br />comprised of poorly sorted, basaltic
<br />gravels, cobbles, and boulders deposited
<br />on a gently - sloping bedrock surface.
<br />These materials are typically in a cal-
<br />careous silt and clay matrix of variable
<br />cementation. Basaltic colluvium at the
<br />site is a mixture of soil and rock debris
<br />which is interpreted to primarily result
<br />from gradual slope wash and mass wasting
<br />of pediment gravels. Such colluvium has
<br />been transported a relatively short
<br />distance.
<br />�DH-5C
<br />/ (76)f
<br />l �
<br />�S
<br />It
<br />t
<br />nu-82r dl -� ''_ !
<br />4) Borings DH -81, OH -81S, DH-82C, DH -825,
<br />DH -83C, DH-835, DH-84C, DH -85C, OH-86,
<br />OH -87, SM -10, SM -11, and SM -12 were com-
<br />pleted as piezometers under the super-
<br />vision of Golder Associates (see Sheet
<br />3).
<br />5) Geotechnical soil borings /piezometers
<br />DH -81S, DH-825, and OH -83S are located
<br />approximately 7 feet from the associated
<br />deep borings.
<br />6) All geotechnical coreholes and soil
<br />borings were drilled by Himes Drilling
<br />Co. under the supervision of Golder
<br />Associates. HQ (2.5 -inch diameter) core
<br />was obtained using air, foam, or water
<br />mist as the drilling fluid. Soil samples
<br />were obtained using a 2.5- inch-I0
<br />California sampler.
<br />7) Rotary exploration borings were drilled
<br />by Himes Drilling Co. under the super-
<br />vision of Colorado Westmoreland, Inc.
<br />•sR1�al�ld{r�'ns�CN r�l �• _ 4 'lti.Tk .yq.,.,c�, j. •
<br />% i/...+� �V',. F•4I���������y �1 �.�•. '�Sr •. 1i1}.1i. F. �Gl•'!� �.� +}F ••
<br />DH -86SC
<br />(8)
<br />DH -83C
<br />•'o'
<br />i
<br />Lo_
<br />D
<br />•; :•
<br />��
<br />>11.7
<br />LEGEND
<br />.
<br />Is
<br />•.
<br />:x
<br />a
<br />Road Fill. Nearby soils and imported gravel
<br />�T P -
<br />(>13J
<br />P11 DH-85
<br />0
<br />.o,
<br />O
<br />'., :..Oaf t'� •• ?..,�•. f.f SM -I
<br />SEEPS ' • :. • },.,.., o: --.� � �
<br />DH 4C
<br />Sm• •1 • • : ••' • • . ••• • • • ••' d. '.
<br />�i
<br />NOTES
<br />OyF.e
<br />OeF,e
<br />C fl
<br />° (44)
<br />06le
<br />y
<br />DH
<br />�iir•y.SEEP
<br />1C 1p20
<br />1) Borings in the vicinity of East Roatcap
<br />Creek indicate that well- sorted, sandy
<br />alluvium is present at least 80 feet from
<br />the center of the drainage. Such allu-
<br />vium is obscured by colluvium (see TP -3,
<br />Sheet 3).
<br />2) Landslides east of East Roatcap Creek are
<br />attributed in part to road construction.
<br />3) Pediment gravels in the site vicinity are
<br />comprised of poorly sorted, basaltic
<br />gravels, cobbles, and boulders deposited
<br />on a gently - sloping bedrock surface.
<br />These materials are typically in a cal-
<br />careous silt and clay matrix of variable
<br />cementation. Basaltic colluvium at the
<br />site is a mixture of soil and rock debris
<br />which is interpreted to primarily result
<br />from gradual slope wash and mass wasting
<br />of pediment gravels. Such colluvium has
<br />been transported a relatively short
<br />distance.
<br />�DH-5C
<br />/ (76)f
<br />l �
<br />�S
<br />It
<br />t
<br />nu-82r dl -� ''_ !
<br />4) Borings DH -81, OH -81S, DH-82C, DH -825,
<br />DH -83C, DH-835, DH-84C, DH -85C, OH-86,
<br />OH -87, SM -10, SM -11, and SM -12 were com-
<br />pleted as piezometers under the super-
<br />vision of Golder Associates (see Sheet
<br />3).
<br />5) Geotechnical soil borings /piezometers
<br />DH -81S, DH-825, and OH -83S are located
<br />approximately 7 feet from the associated
<br />deep borings.
<br />6) All geotechnical coreholes and soil
<br />borings were drilled by Himes Drilling
<br />Co. under the supervision of Golder
<br />Associates. HQ (2.5 -inch diameter) core
<br />was obtained using air, foam, or water
<br />mist as the drilling fluid. Soil samples
<br />were obtained using a 2.5- inch-I0
<br />California sampler.
<br />7) Rotary exploration borings were drilled
<br />by Himes Drilling Co. under the super-
<br />vision of Colorado Westmoreland, Inc.
<br />•sR1�al�ld{r�'ns�CN r�l �• _ 4 'lti.Tk .yq.,.,c�, j. •
<br />% i/...+� �V',. F•4I���������y �1 �.�•. '�Sr •. 1i1}.1i. F. �Gl•'!� �.� +}F ••
<br />DH -86SC
<br />(8)
<br />DH -83C
<br />�•
<br />.'o,p "� '. �• � Mesaverde Formation. (Overlain by variable
<br />°:� • °ROLLINS
<br />colluvial thicknesses.) Interbedded Upper
<br />SANDSTONE „• - Cretaceous shale, coal, siltstone, and sand -
<br />c}� { OUTCROP s _- S stone. Degree of weathering and cementation
<br />_ is extremely variable; calcareous in part.
<br />Major outcrops and other exposures are shown.
<br />The unit is typically covered by reddish
<br />°• o
<br />brown to brown colluvium consisting of silt
<br />__� - o:,. ° °• and sand with abundant angular sandstone
<br />\ LEASE AREA fragments. Colluvial thicknesses are gen-
<br />Od �a •Oi? °•• : BOUNDARY erally less than 10 feet on steep slopes and
<br />outcrops shown. in the vicinity of the outcr
<br />.ice '•'. Y
<br />-_ Rollins Sandstone. Cliff -
<br />forming, fine -
<br />grained basal member of the Mesaverde Forma-
<br />tion.
<br />SANDSTONE SANDSTONE -
<br />OUTCROP •. OUTCROPS -
<br />C
<br />•. Contact between geotechnical units.
<br />Approximately contact between geotechnical
<br />units (queried where inferred).
<br />• ,.e off -esc
<br />Location of geotechnical corehole /piezometer
<br />° •' ° °•• showing the depth of Mesaverde Formation in
<br />(76) parentheses (see Note 6).
<br />SIM Location of hydrologic borehole /piezometer
<br />< showing the depth to Mesaverde Formation in
<br />•'' (46 )
<br />parentheses (see Note 5 and 5)
<br />DH-86 Location of rotary exploration borehole show-
<br />{ (85)• ing the depth to Mesaverde Formation in
<br />parentheses (see Note T).
<br />� Test pit location (Mesaverde units not en-
<br />(> I31 r countered
<br />Location of seep.
<br />° s '•,°- �Uftl VIED
<br />"V 1
<br />O -'•>,� ••
<br />x \tUtUlllllllll°°I re
<br />z
<br />pttME
<br />ST
<br />Mj a'l L N \� pe ^
<br />Rip* 28ai
<br />N �iT•'• :::�'Pp`�
<br />COLORADO WESTMORELAND INC.
<br />NOR= s F .. " . P.O. BOX 1299
<br />8) Base map by Intermountain Technical
<br />Services, Grand Junction, Colorado.
<br />Photography dated 6/27/86.
<br />SCALE IN FEET
<br />0 50' I00 200'
<br />PAONIA, COLORADO 81428
<br />DATE CHECKED REVISION CiACIl VAA-Cy l PO.e7,9LS �E`! = " ✓5
<br />1 S�'l NO. �;z CF 10
<br />GEOTECHNICAL CONDITIONS
<br />(I)
<br />Designed by: RSM DATE: x/ 15166 J H M Golder Associates SHEET NO
<br />QDrawn by: CONSULTING GEOTECHNICAL ENGINEERS
<br />Chocked by: RSM SCALE: AS NOTED a 17301 WEST COLFAX AVE. SUITE H0.275 20F10
<br />Approved by: M6 GOLDEN, wLORADO 80401
<br />•'o'
<br />i
<br />Lo_
<br />D
<br />LEGEND
<br />.
<br />m
<br />•.
<br />a
<br />Road Fill. Nearby soils and imported gravel
<br />associated with major road construction.
<br />(1J
<br />Minor fills on roads in the vicinity of the
<br />East Roatcap Creek valley are not shown.
<br />Alluvium. Poorly to moderately sorted silt,
<br />saand, and gravel. Abundant basaltic boulders
<br />and cobbles are also present in the narrow
<br />°
<br />East Roatcap Creek drainage (see Note 1).
<br />�•
<br />..
<br />:. ;•;.
<br />Landslide Deposits. Non - sorted, unconsoli-
<br />dated mixtures of soil and rock debris formed
<br />o�P
<br />by the combined downward and outward movement
<br />of such materials. The direction of movement
<br />and location of head scarps (hatched pattern)
<br />Y
<br />are indicated (see Note 2).
<br />gbpOq Q.�
<br />Basaltic Col luvium and Pediment Gravels.
<br />0
<br />Rounded su angu ar basaltic grave cob-
<br />bles, bles, and boulders in a silt and clay matrix
<br />'
<br />with varying percentages of sand. Typically
<br />;;•;�
<br />dark brown to brown; often draped by rocky
<br />topsoil of varying thickness, particularly
<br />west of East Roatcap Creek. Shaded where
<br />colluvium estimated to be less than 10 feet
<br />thick (see Note 3).
<br />�•
<br />.'o,p "� '. �• � Mesaverde Formation. (Overlain by variable
<br />°:� • °ROLLINS
<br />colluvial thicknesses.) Interbedded Upper
<br />SANDSTONE „• - Cretaceous shale, coal, siltstone, and sand -
<br />c}� { OUTCROP s _- S stone. Degree of weathering and cementation
<br />_ is extremely variable; calcareous in part.
<br />Major outcrops and other exposures are shown.
<br />The unit is typically covered by reddish
<br />°• o
<br />brown to brown colluvium consisting of silt
<br />__� - o:,. ° °• and sand with abundant angular sandstone
<br />\ LEASE AREA fragments. Colluvial thicknesses are gen-
<br />Od �a •Oi? °•• : BOUNDARY erally less than 10 feet on steep slopes and
<br />outcrops shown. in the vicinity of the outcr
<br />.ice '•'. Y
<br />-_ Rollins Sandstone. Cliff -
<br />forming, fine -
<br />grained basal member of the Mesaverde Forma-
<br />tion.
<br />SANDSTONE SANDSTONE -
<br />OUTCROP •. OUTCROPS -
<br />C
<br />•. Contact between geotechnical units.
<br />Approximately contact between geotechnical
<br />units (queried where inferred).
<br />• ,.e off -esc
<br />Location of geotechnical corehole /piezometer
<br />° •' ° °•• showing the depth of Mesaverde Formation in
<br />(76) parentheses (see Note 6).
<br />SIM Location of hydrologic borehole /piezometer
<br />< showing the depth to Mesaverde Formation in
<br />•'' (46 )
<br />parentheses (see Note 5 and 5)
<br />DH-86 Location of rotary exploration borehole show-
<br />{ (85)• ing the depth to Mesaverde Formation in
<br />parentheses (see Note T).
<br />� Test pit location (Mesaverde units not en-
<br />(> I31 r countered
<br />Location of seep.
<br />° s '•,°- �Uftl VIED
<br />"V 1
<br />O -'•>,� ••
<br />x \tUtUlllllllll°°I re
<br />z
<br />pttME
<br />ST
<br />Mj a'l L N \� pe ^
<br />Rip* 28ai
<br />N �iT•'• :::�'Pp`�
<br />COLORADO WESTMORELAND INC.
<br />NOR= s F .. " . P.O. BOX 1299
<br />8) Base map by Intermountain Technical
<br />Services, Grand Junction, Colorado.
<br />Photography dated 6/27/86.
<br />SCALE IN FEET
<br />0 50' I00 200'
<br />PAONIA, COLORADO 81428
<br />DATE CHECKED REVISION CiACIl VAA-Cy l PO.e7,9LS �E`! = " ✓5
<br />1 S�'l NO. �;z CF 10
<br />GEOTECHNICAL CONDITIONS
<br />(I)
<br />Designed by: RSM DATE: x/ 15166 J H M Golder Associates SHEET NO
<br />QDrawn by: CONSULTING GEOTECHNICAL ENGINEERS
<br />Chocked by: RSM SCALE: AS NOTED a 17301 WEST COLFAX AVE. SUITE H0.275 20F10
<br />Approved by: M6 GOLDEN, wLORADO 80401
<br />
|