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5000 " 'I' 4900 D H 423 EI48124 z o DH 9 EI,48206 ~ ;;. 4800 w -' w . IlL __w~=-_ l.J I I 4-6-50 :;; I I I I 4700' I U-- 4-6-50 ~). . , t ~-.JV._ TP 1235 E I. 4849.:t DH 107 EI 482138 10-13-66 I u,__1 I 4~1-~6 1 I I I u- 4~-1-66 Match line Dwg 382- D-806 / 4600 r.:--n- P ROJ DH 107 EI. 4821.38 On 5'H ,o'b;. 11';_1 I I I [-J '4 bJ 11 f i t] 'N.L. --- EI_~~6_I~h 4-1-66 I I Ii I J fl Vi 11 t03'H II I. I I II 130'8 136.5,LJ 4 -1-66 PROJ TP 1267 EI,4906:t 0',.-., 3.5'LJ 11~9-66 0-5.0' SILTY SAND: About 50/Q very fine-fine sand, about 35/Q nonplastic fines, S/~ coarse sand and gravel, hard, subrounded, very limy, s lightly cemented, dirty, soft many hairline roots, maximum size: (-1/2"L color brown. (SM) 5.01-10.01 SANDY SILT: About 60;0 nonplastic fines, about 40/Q very fine-fine sand, trace ca liche nodules (-1/8"), very limy, slightly cemented, dirty, soft, Maximum Size: fine sand, color light brown. (ML-SM) 10.0'-11.0' CLAYEY GRAVEL: About 70% gravel, hard, sub- rounded-subangular, about 20% low plastic fines, 10/0 fine sand, very limy, low cementation, firm, Maximum Size: 1-1/211, color light brown. (GC) 11.0'-34.01 SHALE: Clayey, silty, fissile, compact but b.(ittle in part, very weathered, very thin-thin bedded dip 30+, moderately fractured with steep seams in part that are slightly healed with gypsum, few limonite stains; color dull dark grarr' Maximum core length: 0.21, average core length 1/2', core very broken to depth 23.6', from fractures, very thin beds, and drill action. 34.01-103.01 SHALE: Silty, clayey, fissile, poorly indurated, lower 15' more indurated, medium bedded, dip 3"1:, few bentonitic beds (0.1'-1-), many silty laminae 48 '_761, few near vertica 1 fractures and low angled seams healed with calcite (_1/1611), Color dark gray- black; open jointed angle of dip 45"+, three between 40.01-41.8', one joint about everr 6' between 44.0'- 96.01, Maximum core lengths: 0.9, core air- slakes about every 0.2' along bedding planes and planes of fissility deteriorates after 10 minutes in water. 103.0'-130.0' SANDSIDNE: Fine grain, silty, many wavy carbanaceow; laminae, hard, thin-thick bedded, dip J"I, few bentonitic beds (O.lf), interbedded shale, fissile, indurated, [rom 112.0'-117.0' and 0.1' beds spaced about 1.0' apart [rom 120.0'-130.0', Color: light gray and black, M'lximum core length: 2.0', average core length 0.6' . 130.0' -136.5' SANDSTONE: Fine gra in, more medium gra in with depth, slight-moderately porous, siliceous, well cemented hal:d, lower 3' has solution vugs (_1/811), few carbonaceolls laminae, medium bedded and crossbedded, dip ranges [rom 3-15"; calor light gray with slight orange stain in part. Maximum core length: 11-2' average core length 0.5'. NOTE: HOle block.:od at 56.6' unable to obtain water level elev., January, 1970 0-3.51 LEAN CLAY. Approx. 85iQ fines with medium plasticity, medium toughness, slow dilatancy, medium to high dry strength. Approx. 15iQ predominantly fine sand. A trace of hard, angular gravel. Gravel and coarse sand sizes are limestone chips. Medium reaction to HCl. Maximum size 1 inch; color - tan to brown; mois ture - dry. In-Place Condition - firm, dry, dense, slightly laminated ground surface covered with limestone chips, grass roots in top 1. 0 foot. Refusal on limestone. .. L E14874,3 4-1~" TP 1235 E I t~:. ... 6.5' '6' \0-13-66 PROJ. DH 108 EI49098 O:~ 0.5~ 37'h~ 14.8'R --~. r" [J "11 fj ~ '=l 67.6'~ ~ "1r 100,8'~ 1033'~ 8- I-j 205,1 I I I II I 2305 ti II 243,8,0 "'-14-66 DH 10 EI48589 T P 1266 E 14860..:1:. " '--' 11-8-66 4 -72~-2Q-~ 4-12-50 0-31 SILTY SAND, approx. 50% hard -:nd brittle, subrounded to flat and angular, coarse to f1ne sand. Approx. 40/0 fines with slight plasticity, slight toughness, slow to medium dilatancy, medium dry strength. Approx. 10/0 hard and brittle, subrounded to flat and angular, coarse to fine gravel with some calcareous surface coatings. These were limestone and granitic. Rapid reaction to HC1. Max. size 3 incLes; color - tan; moisture - dry. In-Place Condition - firm, dry, dense, mottled-heterogeneous. Grass roots top 1.5 feet. 3' -6.5' WELL GRADED GRAVEL with COBBLES and BOULDERS A trace of boulders. Approx. 10% of S- t(1 12 inch, and 10'70 of 3 to 5 inch cobbles. Approx. 55io hard, rounded to subrounded coarse to fine gravel with some calcareous su;face coatings. Approx. 40'7" hard.l rounded to subro unded coarse to fine sand. Approx. 570 non- plastic fines: slight reaction to HCl. Max. size 12 inches; color - multicolor; moi~ture - dry. In-Place Condition - medium to high dens1ty, dry, dense, 6.5~=~6~g?en~~E, Weathered. Only enough was screened through the #40 sieve to perform the hand tests; approx. 90;0 fines with medium to high plasticity, medium to high toughness, none to slow dilatancy, high dry strength. Approx. 10% predominantly fine sand. MeditIII reaction to HCl. In-Place Condition Damp, dense, tan to brown, laminated, homogeneous (highly weathered shale at 6.5 feet to slightly weathered at 16.0') Refusal on hard shale at 16.0 feet. 0-0.5' SANDY SILT: 45% nonplastic fines, 45% very fine sand, 101" limestone gravel, subangular, few hairline roots, very limy, soft, Max. size 3/4", color - grayish brown. (ML-SC) 0.5'-3.7' LIMESTONE: Chalky with interbedded limy shale, little fine sandy, extremely weathered, very broken, soft-compace, color: chalky white and tan. 3.7 I -14.8 I LIMESTONE: Cha lky, hard, weathered, thin- medium beds (0.2 I -1. 0') dips 30! to core axis, a lter- nating limy shale beds (0.21), broken in part, indur- ated, few steep fractures, (?pen) and limonite-stained at 8.4', few psuedomorphs of limonite after pyrite (-114") at 7', color; gray and dark gray; tight joint dips 750 to core axis and calcite healed at 12.4', maximum core length: 1.51, average 0.21. 14.8'-32.7' SHALE: Silty, limy, plat);', poorly indursted, weathered, thinbedded O.l'!, dips 3 ! to core axis, few bentonite beds (1/2"), some limy laminae, few dissem- inated calcite crystals (-1/16") l vertical fractures broken and limonite-stained 25.3 -32.01, color: dirty gray, maximwn core length: 0.3', average 0.1', air- slakes about every 1". 32.7'-67.6' SHALE: Silty, limYl platy, indurated, fresh, medium bedded (0. 7':t), dips 3 !), few limy laminae, color: black-dark gray; vertical open fracture at 67' with pyrite nodule (1/211) at 67.61, maximum core length: 1.31, air-slakes about 0.3', water-slakes after 10 minutes into 1/411:t plates with slight hand pressure. 67.6'-100,8' SHALE: Silty, clayey, limy, platy-fissile, petro11ferous, indurated, medium beds l.01!, dips 30! to core axis, many limy laminae and limy beds ~1"), wavy in part 67.6' to 80.5', bentonitic bed (0.7 ) at 79.5', color: black-dark gray; few open fractures 450 to vertical bearing few slickensides, open joints dip 450 to core axis bearing few slickensides, max. core length: 1.21, air-slakes about 0.2', water-slakes after 10 minutes to 1/411i plates with slight hand pressure. 100.8' -103.3' COQUINA: Cha lky, very limy, modera te ly- very porous (solutioned appearance); soft-compact and poorly-slightly em., granualar (1/8"-t~ 1011-102'; many fossils with solution vugs (-1/4') 101.71-101.9' and 103.01-103.31; bentonite 102.01-102.9', color: creamy light brown. PROJ PROJ AD 6 TP 1270 '--EI4885 __EI4889" LJ 8 27 47 II 9 66 PART 4 OF SECTION A-A '00 I, '00 , HORIZONTAL SCALE OF FEET 200 , DH 10 El4858.9 0' . b " 15' 0_7' SAND, GRAVEL, and ROCK, few boulders 7'-15' SILTY CLAY, brown 15'-22.61 SHALE, hard, clayey 22.6'-27.6' CLAY, bentonite 27.6'-69' SHALE; hard 27.61-32.4'; weathered 32.4'-46.4'; blue, badly seamed and broken 46.4 '-51.41, hard 51.4'- '69.0 69'-70.4' LIMESTONE, not too hard 70.4'-136.9' SHALE; blue 70.4'-76.4', hard 71.4'-76.4'; black with streaks of white clay 76.4'-101.9'; blue 101.9'-136.91, hard and soft layers 101.9'-116.9', hard 116.9'-136.9'. 136.9' -151. 7' SANDSTONE and SHALE, gray and black 151.7'-161.7' SANDSTONE, gray 2.2.6' 276' W.L. EI. 4814.9 'c 4-12-50 69' 704' 1369' 1517'. \61.7' 4-12- 50 -00-108 - continued 103.31-205.71 SHALE: Silt~, fissile-platy, indurated, medium beds 1.0':t dips 3 + to core axis, top 5 I is limy, few calcite veinlets (1/16"), few bentonite beds (0.2 +), many limy laminae, wavy in part 163'-1891, color: dark gray-black, many steep open fractures 104'-110' and 1 about every 8' from 114'-205.71, few open joints 45n~ to core axis, few are calcite, healed and slickensided, maximum core length: 1.6', average 0.81, air-slakes about every 0.3', water-slakes into 1/8" fragments after 5 minutes. 205.7'-230.51 SANDSTONE: Silty-fine grain, many carbon- aceous laminae, wavy in part, slightly porous, well cm.-hard1 sha1y with few bentonitic beds (0.1 ) from 114' -120 th in- thick bedded 0.3' - 3,0' and crossbedded, dips 0-20n to core axis, color: light-dark gray and black banded, near vertical open fracture, 3 between 220'-223.5', broken at 227'! and tight in part 228.4' to 230', open joints dip 30 to core axis at 215.6', maximum core length: 2.8', average 0.8', more shaly core. 230.5'-243.8' SANDSTONE: Fine grain, slightly-moderately porous, siliceous, wellcem.-hard, few solution vugs (-1/8") medium bedded (0.7 'i) and crossbedded 3 to 200, Color: gray; tight vertical fractures 233'-237', color: gray; maximum core length 0.71, average 0.5'. NOTE: Water level elev 4797.8, JanuarYI 1970 PROJ. DH 108 EI. 49098 PROJ TP 1267 E14906" _.Iio-2-___r-l___ 11-9-66 _~" I I 4-12-661 I I I I I I I I I I I LJ 4-14-66 PROJ T P 1266 E I. 4B60:i 0' '5'R r 'O,.W F.JiI 19.B'~ 11-8-66 PRQJ. AP 1206 EI.4936.:t 0' 3'Q 6'8 9''"'' 9-\4-66 ANGLE FROM VERT. 300 PROJBEAR~~G 4~O'5. W ~~~;~~ EI494170 0-3.~' SAND~ CLAY. Approx. 70"/0 fines with medium plasti- c~ty, medulm toughness, slow dilatancy, medium to high dry strength. Approx. 25% predominantly fine sand. Approx. 5% ~rittle and hard, angular to subangular, coarse to f1ne gravel. Gravel and coarse sand sizes a:e limestone chips. Medium reaction to HCl. Maximum s:lze.- .not no~ed; color - tan; moisture - dry. In-Place Cond~t1on - ~1rm to very firm, dry, dense, homogeneous, I?rass ;oots 1n top 1.5 feet. 3.5 -10.7 LEAN CLAY. Approx. 85% fines with medium p la ~ tici ty, . medium toughness, none to slow dila taney, m7d~um to h1gh dry strength. Approx. 15;0 predominantly f~n~ sand: A trace. of fine gravel (limestone chips). Max1mum s~ze -:- ~/2 '~nc~; color - tan, moisture - dry. In-Place Cond1t10n - f~rm to very firm, dry, dense, homogeneous. 10.7'-19.8' WELL GRADED GRAVEL with COBBLES and BOULDERS, A trace of boulders, approx. 5% of 5 to 12 inch and 10% of 3 to 5- inch cobb les . Approx. 70% ha rd, ~ounded to subrounded, coarse to fine gravel with occasional gypsum surface coatings. Approx. 30'/0 hard, rounded to s,-!brounded, coar~e to fine sand. A trace of nonplastic f ~nes. No reac t 10n to HC 1. Maximum size - 13 inches' col:>r - mul~i-color; moisture - dry. In-Place Condition _ med1um to h~gh density, dry, loose to dense, heter- ogeneous. Stopped at limit of backhoe. 0-3' GRAVELLY SILT, approx. 607. fines of s light plasticity, slight toughness, slow dilatancy, slight to medium dry strength. Approx. 25"/0 soft and brittle, flat and angular, fine gravel (some gravel might break down to pass the #4 screen) (Jimestone and shale chips). Approx. 15'- predominantly fine sand. Rapid reaction to HC1. Maximum Size 1 inch; color tan; moisture - dry. Ill-Place Condition Finn, dry, dense. 3'_6' SHALE, ~ly enough was screened through the #40 sieve to perfonn the hand tests; approx. 90'70 fines of medium plasticity, medium toughness, slow dilatancy, mediun to high dry strength. Approx. 10io predominantly fine sand. Rapid reaction to HCl. In-Place Condition Firm, dry, dense, laminated, tan. (highly weathered at 3.0' to medium weathered at 6.0') 6' -9' SHALE (Slightly Weathered) Refusal on shale at 9. 0 ~ 9 \4-66 \ \ \\ \\ o PROJ DH 423 EI.4BI2A o' n r j ~ 1 l 19":-.J 23'H f J 32,6'[1 :1 49,d 11-22-68 1-6-69 PROJ. AD 6 EI 4885 O'pc) 6'~ an I I 22,ld 8-27-47 0-19.0! SANDY CLAY with LENSES OF GRAVEL 19.0.:!:-23.01 SHALE: Hardness 5, clayey-Silty, moderately to highly weathered, blocky, bedding less than 0.2' 0_50 dlp'otop 0.21 limy, gypsum seams (-1/16") thr~~ghout dip 15-25 , and along bedding; yellow-brown becoming gray with depth; irregular blocky fractures r,airline to open, air-slakes dnd water-sl.:__..;(es into 1/4" fragments in 5 minutes. Hax. core length C.3', av=rage mostly less than 0.2' and fra~ents. 23.01-32.61 SHALE: Hardn~ss 5, clayey-silty, lightl~ weath~red, blocky, bedd1ng planes spaced -0.1'-0.2 , dip 0 , scattered gypsum seams (1/16") dip 20-250 , widely scattered bedding planes coated with calcite, medium gray with widely scattered Fe staining, apparent fracturing from drill action?, air-slakes, water-slakes into 1/411 fragment~ in 5 minutes. Max. core length 0.2', average mostly 0.1 and less, core conunonly under sized from drill water action. 32.6 I -49.0' SHALE:: Hardness 5 -6, c layey-s ilty, fresh, mostly brittle, vlaty to poorll' fissile, beddin? planes laminated to 0.33 apart, dip 0 , bentonite 32.6 -32.8' and 45.2'-45.6' (recovery 0.1', drill action suggests about 0.4')'lmedli~ to dark gray, gray bentonite; fractured 40 -41l.5 (recovered as irregular fragments) j oint at 32.1', dip 200, healed with gypsum (-1/16"), . air-slakes to poker chips and bedding planes 0.2 I apart, water-slakes into 1/411 fragments in 5 minutes. Max. core length 0.5", average 0.3'. Water level not dietermined ..L EI.4792.6 ~6i"0" 0-6.01 SANDY LOAM, Topsoil 0-1.0' i wery dry shale chips. 6.01-8.0' SHALE, very soft. . 8.0' - 22.0' SHALE . ClAY, and SANDY LOJAM, sma 11 pieces of .s9ft shale, some clay, lime streakcs, 50'70 sandy loam. 22.0 SHALE, very tight. NO water level data available PROJ ANGLE FROM VERT 300 BEARING S,ISoW DH 410 EI. 494170 0(\ \ \\ ,.,~~ ,,~ '<.'\. \'\ '(:\ ~:~ \:;~ \~ bb.i~ \ \ \\ \- \: \\ \..> , ' ,0 t- 6~69 PROJ T P 1270 EI,4B89:l:: ~:~ 5'W 11-9-66 0-18.4' SAND, silty: with small amounts of _111 limestone gravel (no sample reta~ned) 18.41-24.8' LIMESTONE: Hardness 6, with alternating limy shale beds, hardness 4-5, very weathered limestone blocky and chalky, shale platy and silty with trace fine sand beds dip 300 and 0.7' thick, four beds of limestone ' limonite-sttaining along bedding planes, 0.3' bed Fe' stained bentonite at 24.1', medium gray limestone and dark gray shale; shale air-slakes into -3/4" plates. Max. core length 0.3', average -0.1'. 24.81 -66.2 I ILIMESTONE: Hardnes s 7) wi th a 1 ternat ing limy shale beds, hardnes:; 6, fresh, limestone blocky ana chalky shale platy to E'oorly fissile with many limy laminae, siilty beds dip '30 , 22 limestone beds 0.7'-2.0' thick, shale beds 0.7' -1. 3' thick, beds of bentonite range in fhickness 0.1' -1. 0' becoming more thick with depth at 34.41, 35.91, 44.8', 47.3', 55.01 and 61.41, broken 61.0'-61.4', medium gray limestone and dark gray shale; trace +2" fossils, shale air-slakes about 0.11-0.2' apart to 35.01, below 35' does not air-slake. Max. core nength 2.01, average 1.0'. 66.2'-102.4' SHALE: Hardness 5-6, fresh, silty, limy, platy to pcoorly fissile, beds dip 30" and open beddi.ng planes 1.0" thick, many limy laminae wavey and broken below 88.0", bentonitic 91.41-92.2' and 94.81-95.31 trace +2" fossils, 1/4" calcite seam at 84 I, diss~inated druse pyritte crystals along bedding planes at 96.7',100' and 100.9' u black with light gray laminae; one open joint dips 500 att 90.11, core air-slakes along bedding planes about everjy 0.5', Max. core length 1.4', average 0.8'. Water levell not determined. .. 77Zr;:. 113 PROJ DH 9 EI 48206 0' '1 1.01 116'f. I j fl fl ~ fj P3 fJ II I J Fj [ ~ n f=l 963'~ ~d 1063:g 112r1 II 0-11.6' SAND, GRAVEL and ROCK; few boulders 0-10', some clay 10'-11.6' 11.6'-96.3' SHALE, blue, badly weathered 11 6'-281. black, white streaks of claYl 28'-51.31; biue, ha;d 51.3'-56.31, soft 56.3 -61.3 , hard and soft layers 61.3'-71.31, streaks of sandstone and soft gray shale ~i:~:=~t~:' hard with soft layers 76.3'-81.3'; black 96.3'-106.31 SHALE and SANDSTONE hlack and gray 106.3'-112.0' SHALE; black. 106.3'-111.3" blue 111.3'-112' 112.0'-126.3' SANDSTONE, hard ' 126.3.LJ 4-6-50 o~ 1', TOPSOIL (No samples taken), grass roots throughout. 1 -5 SHALE, Weathered (Lean Clay), only enough was screened through the #40 seive to perform the hand tests, approx. 85% fines with medium plasticity, medium toughness, slow dilatancy,medium to high dry strength, approx. 15% pre~ dominantly fine sand, slight to medium reaction to HCl. In-Place Condition, Very firm to hard, dry, tan with brown streaks, dense, laminated, gypsum crystals throughout, 3 inch seam of bentonite at 2.5', with lesser seams to 5.0'. (Shale is moderately weathered at 1.0' to slightly weathered at 5.0'). Refusa 1 on sha Ie. NOTE For explanation and notes,see Dwg 382-D-802. ~ ALWAYS TlUnK SAfETY UN/TED STATES DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION FRYINGPAN-ARKANSAS PROJECT-COLORAOO PUEBLO DAM LOGS OF EXPLORATION SECTION A-A C L -N R W SUBMI T TEO #.d..At~-, /-~;d TRACED. _ -'!..~'-"":' RECOMMENDED_~K.~ --=-=-_-__ CHECKEcRl.~"-r--, _ _ -APPROVED_ ~ ~ ~~ ACT' C""~-", ~NG"'G '1:Jo-ZOy-g';VI.'ON - DE::NVER. COLORADO. JANUARY 20, 1970 SHEET 6 OF 6 382 0 807