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:...' :-;. 9 .. U" f,} ANGLE FROM VERT 380 BEARING N. c- DH 402 : E1.4763.7 ANGLE FROM VERT. 330 PROJ. I BEARING N. DH 117 'fDH402A EJ.4763.4""~1 . .. E1.4763.7 :")0" ANGLE FROM VERT. 280 4800 \ I BEARING N. PROJ.;' ~/DH 402 B PROJ PROJ DH 116~. /~ E1.4763.5 DH 419 DH I EL4761. 2 I \ ! / EI.4763.7 EI.4764.4 WL 4750 I~i ~~ I I 4-20:66~r0 I 10-29'68 I I I _WJ" >y .w I J.t /. ANGLE F~~(ilvERT 5001 I I 11-20-66 ;. <f II BEARING N. I I I I '{ EID~7~~56 I I I 4700i.J III I r- -I I III PROJ- ,ANGLE FROM VE RT 380 I I I III \ BEARING N I I I Ii : -~,H4~~25t U I I I 10'16'68 J I 4650 I~-. I I ; I 'f ANGL~EFARR~~G V~.RT 430 f- I':' DH 402 C I I ~ I Q EL4763.8 I I W I I I ~ 4600, I ANGL~:~~~Nci'EN~T, 380 ~ 1-- I DH 402 D I I ~ E1.4763.8 I I .i-> ANGLE FROM VERT 300 U ~ BEARING N. 5-13-48 4550----"---. DH 402 E E1.4763.0 PROJ. DH 418 EI.4762.6 w. L. -.J I- ~I I I I I I I ---J ~ I I I I I I U 10-8.68 ~ Match line Owg, 382-0-803______ ANGLE FROM VERT. 280 BEARING N. DH 402 B E1.4763.5 "'y....'.............................................0; >,~!~~s :_ 5(]'" "-. JJ:s' ...:..... >'19'68 PART 28 OF SECTION A-A 50 0 50 100 1" j I, ,I I I SCALE OF FEET 1 ., I ~ t I 1 ~Match line Dwg. 382- 0-805 PROJ. DH 116 EI4761.2 Ii I I I I I I I I w. L I EL 4739.2 I! ~ 279'Y 4~12~66 318'W I I I I I I I I 1 I I I I I 11 67'1d 70.6'1';-'1 1,1 1.1 1;'1 87'iI 93.3'~ ~ 1075,0 4-12-66 ANGLE FROM VERT 430 BEARING N. DH 402 C EI.4763.8 0-33.61 SANDSTONE: Hardness 6-7, fine to medium grain, sugary, porous, siliceous, somewhat weathered to 28', brown co lored and wea thered to 33.61, crossbedded 350_400, irregular bedding at about 400, carbonaceous coating and vuggy along open bedding planes, small vugs up to (1/4") Some filled with carbonaceous material. Slightly limonite-stained throughout, dirty gray to buff, several open steep angled open joints limonite--stained. Max. core length: 3.2', average 1.3' PROJ. ANGLE FROM VERT. 3Bo BEARING N DH 405 A E14762,5 0-32.81 SANDSTONE: Hardness 7, fine to medium grain, sugary, porous, siliceous, 0 sli~htly weath~red, I cross- bedded at 650, beds dip 30 -40 , beds 0.4 -5.0 , carbonaceous- coating and vuggy lllong open bedding..,p..J.anes, slightly limonite-stained throughout, vuggy areas gra~ to buff color, few open joints limonite-stained (1/10 ') severa 1 steep angled frac tures. Max. core length: 5.1', average 1.21. 32.8'-77.9' SANDSTOr:m: Hardne~s 7! fine ~o medium, grain I sugary, ~orousl slllceous, llmonlte-stalned 32.8 ~35.0 I and 54.5 -67.0 ; weathered rusty brown color 35.0 -54.5 and 67.0'-77.9', cross bedded at 500, beds 0.2'-5.0', carbonaceous coatings and laminae along open bedding planes, open joints limonite~coated, dip 350, several tight irregular fractures, sandstone with alternating thin shale beds (0.2) 75.01-75.6', sandstone very vuggy, dirty gray 75.6'-76.3'. Max. core length: 5.1', average 1.4'. 0-27.9' AIR - drilled frOO! bridge deck 27 . 9 ' - 31. 8 ' WATER 31.8'-67.0' SAND: 70% med. sand, poorly graded, 20'70 coarse sand, 1070 med. gravel, hard, sub-rounded., sl. limy, soft non cm., max. size 1", color: tan, (SP), wash sample. 67.0'-70.6' SANDSTONE: Fine grain, 51. mod. porous, siliceous, cm.,sl. limy, beds 0.8'! and crossbedded dips from core axis 50 _300, few carbonaceous thin laminae, 0Den fractures near vertical @ 701; color It. gray~ Max.'core length: 1.11, avg. 0.5' (Interpreted rock ledge) 70.6'-87.0' SANDY GRAVEL: 90% fine and coarse gravel, hard, sub-rd. to sub-ang., skip graded, 10% coarse sand, max. size 1-3/4", color tan (GP) wash sample. 87.0-93.3' SANDSTONE: Fine grain, s1. porous, siliceous, em. many carbonaceous laminae, vy. thin-med. bedded 0.1'-1.2', and crossbedded, from core axis dip ranges from 50_300, tight vt. fracture @ 88'; color It. gray and dk gray banded; Max. core length; 1.2', avg. 0.3', air - s lakes along bedding planes. 93.3'-107.5' SHALE: Silty, poorly fissile, soft-compact but brittle upon drying~ vy. weathered, thin-med. bedded 0.1'-1.0' thick) dips 3 ! to core axis, few open vert. fractures, broken in part; color: dull dk. gray; open joint dips 450 to core axis at 101.8', Max. core length: 0.5', air-slakes about every 0.2', cCJIlplete1y deteriorates after 10 min. in water. NOTE: Artestlon seep - Water level de..., obove ground surfoce 4161,2 + January, 1970. 0-33.0' SANDSTONE: Hardness 7, fine to medium grain, sugary, porous, siliceous, slight ly weathered to 26.0', weathered with some limonite staining 261-13.0', beds (0.1'-2.1') dip 400, crossbedded at 650, carbonaceous coating and vuggy along open bedding planes, several steep angled open joints limonite coated, occasional steep angled fracture. Max. core length: 2.1', average 1.4'. 33.0'-63.4' SANDSTONE: Hardness 7, fine to medium grain, sugary, porous, siliceous, weathered with some limonit~ staining 33.0'-40.0', badly weathered rusty brown 49.0 - 54.0' beds (0.3'-5.2') dip 400, crossbedded at 450, carbo~aceous -- coa ting and vuggy a long open bedding planes several steep angled open joints with limonite (0.01') coating, fractured 55.5'-55.8', gray to buff except weathered zones. Max. core length: 5.2', average 1.7'. PROJ DH 419 EJ.4763.7 0-90 SI SANDSTONE: With carbonaceous partings and streakings several shale beds 83' -90'; sandstone is composed p;imarily of fine to medium quartz grains, sugary texture, porous, water drops ~laced on core are quickly absorbed, noncalcareous. Drlll water left partial coating on core which has a high reaction to HC1; numerou8 small vugs (1/16"-1/8'10-34.0', 1/8"-1/4" vugs 72'-81.0', crossbedded 0-25 measured frClIl a line normal to core axis.; hardness 6-7, slightly friable on broken surface, grayish white; numerous carbonaceous streak8 0.02 at 13.3' and 0.01 at 61.6'; shale is fissile, clayey, noncalcareous, several shrinkage cracks after drying core damaged br drill water during drillill! 1 it occurs' at: 68.1'-68.6, 69'-69.2', 0.01 at SO.2', /:li0.3' and 804' 83.2'-83.4' 84.8'-85' 87'-87.7',89'-90.2'. (89.45:90: 2' to Chief tngineer' s iab prior to 10~ging); rusty, 0.05' pyrite replaced carbon seam at 32.0 ; open 9(J.~~~n~~9V1a~;;;.Jr:i~g~:ee~~~\)~~5' thick, light gray, brittle, silty, fine-grained sandstones; ~hale is fissile, clayey, waxy luster when polished, noncalcareous except for occasional paper thin calcite laminae) hardness 5, can be cut with knife when fresh, scratched with knife when dry; core breaks readily along bedding planes; shrinkage cracks develop during drying, core eroded by drill water during drilling. W. L E1.4745.5 --------v~ 10-29-68 PROJ. DH 117 E147634 0'1' I I I I I I I : EIW4~39.8 I I ~26.<>+-, 4-20-66 I I '5'r-J I: I I I I I II I I 6"W 1.'1 I- 1-,1 80'b, 82.7~ :;~f~ 95.8'~ R ~ ~ 114'~ 4 -20- 66 ANGLE FROM VERT 380 BEARING N. D H 402 D E1.4763.8 0- >". e,> '6e PROJ. DH I E14764.4 a'n II II 1,1 T ~~1 I'.' II II II 91,6' b2I 96_8,a R ~ ~ ~ q Ej ~ E3 @ 171.3'8 II 178'Ed 182,1'~ 1.1 I::J II 197,L] 5-13-48 ~;;~~;~;5.~fR WA~lIed from bridge deck 35.0'-65.0' SAND: 907. poorly graded fine medium sllld l~% coarse sand and small gravel, hard, sub-rd., 81: llIDX.. sl. micaceous) clean, soft, few decayed limbs 1/2 - diam. Max. size I"; color tan (SP) 65.0' -80.0' SANDY GRAVEL: d5t med. gravel (s iI iceous and s~ndstone), sub-an~. to sub-rd., 151 fine-medium sand wlth trace nonplastic fines, limYl soft but dense Max. Size 1 1/2"; color brownish gray (GP-SP) , 80.0'-82.7' SANDST(llE: Fine gr.,cm., siliceous, s1. limy, weathered, mod. porous, med. bedded 0.5'-1.01 and cr08S- bedded dips 150 -250 to core axis, limonite-stained in part and along bedding planes, vert. fracture at 82.4'; color rusty brown and gray, Max. core length 1.0 I, average 0.51. 82.7'-87.0' GRAVEL, 1007. med.-hrge gravel hard sub-rd Max. Size: 2":f:; color mottle gray (Gf'-Qd (wa~h sampl~' believed to contain sane fine-med. sand). ' , 87.0: -87 .7: SANDSTONE: Same description as depth 80' -82.7' . 87.7,-89.8, GRAVEL: Same description as depth 82.7'-87'. 89.8 -95.8 SANDSTONE: Fine-vy. fine gt:., siliceous, well em., s1. weathered~ s1. porous, thin-bedded 1/2 to 6" crossbedded 100 -20 dip to core axis, carbonaceous se~s along bedding planes (-1/16") and laminae interbedded more shaly w/depth) shale transition 94.5'-95.81, ne~r vert. fractures and broken at 89.8' -91. 91, and 92.3 I w/minute pyrite crystals; c0lor grar and blk. banded) Max. Core Length: 0.5', average 0.2 . 95.8'-1I4.0' SHALE: Silty, fissile, canpact but brittle, upon drying, vy. weathered to 104.01 and mod. weathered 104'-114', thin-med. bedded 0.41-1.0', dips 50.:f: to core axis, few fine sandstone lenses interbedded (1/4".:f:) in lower 10 I; color dull dk gray; few open near vert. fractures some 51. calcite~healed (1/10" seams) bearing some minute pyrite crystals, few oven j ts. dip 450 to core axi~ at 101') 103 I, 107.4' and 112 , Max. Core Length: 0.8 , air-slakes about every 0.2', cOOlpletely deteriorates in water after about 10 min. 0-31.0' SANDSTONE: Hardness 7, fine to medium grain, sugary, porous, siliceous, sligh t ~y wea thered to 13.0', weathered with carbonaceous materlal scattered through the sandstone 13.0'-25.0', crossbedded at 55", beds (0.05'-3.6') dip 350, several steep angled fra~tures, carbonaceous-coating and vuggy along open beddlng planes steep angled open joints limonite--coated, vugg:t (up to 1/3") sometimes filled with carbonaceous mate::::-lal, gray to buff. Max. core length: 3.6', average 1.4'. 31.01-73.0' SANDSTONE: Hardness 7, fine to medium grain, sugary porous, siliceous, slightly weathered0311-34',. 43'(-49', 64.6'-70.0', some crossbedding at 50 , bed~ dlp 350 carbonaceous coating and buggy along open beddlng pla~es several steep angled joints limonite coated (1/10") dirty with carbonaceous material 43'-49', gray to buff. Max. core length 3.1', average 1.2'. 73.0' SAND, alluvial, no sample. PROJ DH 418 EL4762.6 0'('"3 II 1.1 w. L. I:' 1 EI4','5()j I 10-29-68 1:::.1 1:1 :: 1.1 II II II !i 1...1 II II II 92.4'8 ~ IOI.8'~ 10.8-68 0-91'10" SANDSTONE 91' 10"_%' 10" SANDSlVNE and SHALE 96110"-17113" SHALE; black 96'10"-11913"; bl.eck l3l19"-1.36'; l7l~~~~1}~~'-~ll~~6N~laok 13"6"-142'; black 150'9"-161'. 178'-182'1" SANDSTONE and SHALE 182'1"-197' SANDSTONE NO Water level do to available ANGLE FROM VERT 380 BEARING N DH 402 E14763.7 ANGLE FROM VERT. 300 BEARING N DH 402 E E1.4763.0 0-30.91 SANDSTONE: Hardness 6-7, fine to medium grain, sugary, porous, siliceous, somewhat weathered cross- bedded 450_~50, irregular bedding at about 50~, carbon- aceous coatlog and vuggx along open bedding planes several small vugs (1/4 '), slightly limonite-stain~d ~hroughout, dirty gray to buff; few steep angled open Joints limonite-stained, healed joint at 22.0'. Max. core length: 4.5', average 1.4'. 0-8.0' SANDSTONE: Hardness 6-7, fine-medium grain, sugary texture, ~orous, siliceous, slightly weathered, cross- bedded 45 _600, beds 0.6'-2.6' thick, top 0.5' limy, Fe stained, 81ightly limy and vuggy along bedding and joint planes, buff ~ray; vertical open fractures with two open joints dip 55 7.0'-8.0'. Max. core length 2.3', average 0.8'. S.0'-72.5' SANDSTONE: Hardness 7, fine-medium grain su~ary texture) porous, siliceous, fresh, crossbedded 45 _600, beds 0.4'-4.8 thick, most bedding planes coat.ed with carbonaceous material, several carbon laminae aad stained bands, Fe stained 44.0'-47.0' and 56.4'-59.1', light gray with dark bands; few 700 to vertical fractures, open and mostly Fe stained above 48', broken and Fe stained 24.5'-25.7', 10 joints are open dip 600_750, Fe stained above 48.0'. Max. core length 4.8' , average 1.3'. 72.5'-73.5' SAND and GRAVEL: (No sample) Void along Hde river gorge. 73.5'-76.5' SILTSTONE and SHAlE: Hardness 7 and 5, silty to fine sandy, with mRny sholy laminae dnd are wavy, shale is silty-clayey, blocky, bottom 0.5' is bentonitic, interbedded, beds dip 350 and arc 0.1'-0.81 thick, silt- stone medium gray. shale very dark gray; steep irregular and open fracture 75.61-76.3'. Shale air-slakes along bedding planes. Max. core length 0.8', average 0.31. 0-92.4' SANDSTONE, cOOlposed predominantly of fine-medh.m grained quartz sand with occasional carbonaceous streaks and bedding and some shale seams; alternating shale and sandstone layers 88.0' -92.4', sugary texture and appearance, porous - water dropped on core surface absorbed rapid ly, nanca lcareous except 15. I' -18.6 I , 30.1'-32.11, and 44.8'-45.6' had low reaction to HCl, hardness 7) friable on fresh broken surface, core breaks readily along shale and carbonaceous bedding; 82.3~-82.5' is very friable and porous, possibly a solution zone; crossbedded 5u_300 nonnal tu the core axis, individual beds 0.11-3.0' thick, light gray with apparent oil stains at 4.0',4.51,5.8',6.3',7.8',8.3',9.0', and l8.S' and limonite staining 26.7 -30', carbonaceous l_inae vary from paper thin to 0.05', occur as 1/2" chunks at 52', a few thin l_inae appear to have deposition or cOOlpaction contortions; occasional 1/8" vugs occur to 89', vugs 1/4 to 1/2" occur 5D.4'- 52.71 and 67.0'-69.6', several bedding planes are vuggy and rusty 26.5'-27.3'; shale layers occur at 22.5'-22.S5', 0.02' at 86.5' and 88.9', 89'-89.21, 0.041 at 89.9', 91.31-91.7', liihalt-ball at 58.9', numerous paper thin laminae 88.91-92.4', shalE" laYf'Ts above 89.0' are ai...Lt:y, brittle) dark gray, hardness 6, and do not air-ur water- slake; shale below 89' is clayey, hardness 5-6, can be f~~e w;;~d~n;f~ts~:~ ~~~~, -~1~9 ~7d h::~~~;:l~;e~a~e:~ilY, scratched with knife, does not air-or water-slak.e, light gray. Maximum core length 5.2', average core length 1.5'. 92.4'-101.8' SHALE, clayey, thinly bedded (0.01) occasional 0.05' hard brittle siltstones which occur at average 0.5' intervals, shrinkage cracks develop in shale shortly after exposure to air, core eroded during drilling, low reaction to Hel, hardness 5, can be cut with knife, waxy luster when polished, core breaks readily along bedding planes, dark gray, no joints. ~ 77ZDJ 110 ANGLE FROM VERT. 330 BEARING N. DH 402 A E14763.7 0-33.41 SANDSTONE: H,,:,-rdness 6-7, fine to medium grain, sugary, porous, sillceous, somewhat weathered to 30', brown colored and weathered 30'-33.4',_ crossbedded 400_ 500, irregular bedding at about 450, carbonaceous~ coating and vuggy along open bedding planes, small vugs up to (3/S") some filled with carbonaceous material, slightly limonite--stained throughout, dirty gray to buff; few steep angled, open joints, limonite- stained. Max. core length: 2.2 I, average 1.4'. NOTE: Driller reported sand and gravel at 33.4'. This is sand and gravel in the Arkansas River Channel. PROJ. ANGLE FROM VERT. 500 BEARING N. DH 405 EL4762.6 /') ~~~>.t /<<)>/ lSl .t~ /:::::)';/ ~.:..::::-.:./ 0-32.2' SANDSTONE: Hardness 7, fine to medium grain, -(:,::,/ sugary, porous, siliceous, slightly weathered, cross- .{:::',y' bedded at 700, beds 0.4'-4.0' thick, carbonaceous- ('.<:/ coating and vugs along open bedding planes, slightly cS'" /..(.:.:..::/ limonite"stained throughout, vuggy, gray to buffi few ~.fI'((.::.::)/ open joints limonite-stained (1{10"), dip 400-50 , few ~fI'V' steep angled fractures. Max. core length: 3.5', 'c5'o> average 1.5'. 32.2'-63.4' SANDS'IDNE: Hardness 6-7, fine to medium grain, sugary, porous, siliceous, somewhat weathered, buff, limonite~stained 32.2'-40.0' and 57.0'-63.4'._ Weathfred rusty brown 40.0'-57.0', crossbedded 600_700, beds 0.2'-4.0', carbonaceous--coating and laminae along open bedding planes, several slightly vuggy areas, an occasional open joint, limonite-coated to 55.01, dip 400_500, several tight irregular fractures. Max. core length: 3.5', average 1.1'. NOTE For explanation and notes, see Dwg. 382-D-802. @ ALWAYS TlllnK SAfETY UNITED STATES DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION FRYINGPAN ~ ARKANSAS PROJECT- COLORADO PUEBLO DAM LOGS OF EXPLORATION SECTION A-A DRAWN_ ~:... c. -.......:.R.:..~..:._ TR/l CEO WA P CHECKED_Ir:),--p ~ ~":.~_- SUBM'TTEO~~:' (_~________ RECOMMENDED~ _ _ K - _ _ _ _ __ _APPROVED~_&...:.~_ .~_______~ A" '": CHI~F. ~1V(i"(i_ (J~oj6GY OlVI510N DENVER, COLORADO, JANUARY 20. '970 SHEET", OF 6 382-D-804