Attachment___2_00_00_02_AVC_Boone_Reach_2_-_Drawings_-_11x17___Geodata.pdf

38°20' 38°19' 38°18' 38°17' 38°16' 38°15' 38°14' 38°13'

38°20' 38°19' 38°18' 38°17' 38°16' 38°15' 38°14' 38°13'

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P im a

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RRRR

t D ril l H ol e t D ril l H tt

DCo nt ou rs

US

F ee t rs

US

DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDAr tif ici al

F ill

(a f) ll (a

f) Qu at er

Qu

Ra ilw ay Co m pa ny St at e

H w y

Ya tz e R d

TP

-2

0-

D H

-2 0-

38°15'25" 38°15'20" 38°15'15" 38°15'10" 38°15'5"

38°15'25" 38°15'20" 38°15'15" 38°15'10" 38°15'5"

-1

°1 7'

-1

°1 8'

-1

°1 8'

5" -1

°1

8'

-1

°1

8'

-1

°1

8'

-1

°1

8'

-1

°1

8'

-1

°1

8'

-1

°1 7'

-1

°1 8'

-1

°1 8'

5" -1

°1

8'

-1

°1

8'

-1

°1

8'

-1

°1

8'

-1

°1

8'

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8'

-1

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8'

F R

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IN

G P

A N

-A R

K A

N S

A S

P R

O

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C T, A R

K A

N S

A S

V A

L L

E Y

C O

N D

U

IT

B o o n e R e a ch

S u rf a ce G e o lo g y

U

SB

R

M B

G

IS

M

B G

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LO

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N or th A m er ic an

D at um

(2

1) S ca le

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U

S Fe et

Fi el d s u rv ey d a ta p o in ts a n d g eo lo g ic m a p p in g f ro m U

SB

R w it h N

A

IP

im a g er y.

D

EM

g en er a te d v er ti ca l c o nt o u r p ro fi le b y M

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IS

Le ge nd

AV

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B o on e Re ac h f t D ril l H ol e

Te st

P it

Co nt ou rs

U

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Ar tif ic ia l F ill af

Q ua te rn ar y

Al lu vi um

Q al

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6:

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VC

B oo ne

R ea ch a lig nm en t s ur fa ce g eo lo gy

R ai lw ay

Co m pa ny

St at e H w y

D H

-2 0-

Bo on e Cr k gr ab s am pl e

38°15'20" 38°15'15" 38°15'10" 38°15'5" 38°15'

38°15'20" 38°15'15" 38°15'10" 38°15'5" 38°15'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

-1

°1 7'

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-1

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F R

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IN

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-A R

K A

N S

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P R

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JE

C T, A R

K A

N S

A S

V A

L L

E Y

C O

N D

U

IT

B o o n e R e a ch

S u rf a ce G e o lo g y

U

SB

R

M B

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M

B G

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LO

G Y

N or th A m er ic an

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(2

1)

S ca le

1:

5, in ch

6.

fe et

U

S Fe et

Fi el d s u rv ey d a ta p o in ts a n d g eo lo g ic m a p p in g f ro m U

SB

R w it h N

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im a g er y.

D

EM

g en er a te d v er ti ca l c o nt o u r p ro fi le b y M

B G

IS

Le ge nd

AV

C

B o on e Re ac h f t D ril l H ol e

G ra b Sa m pl e

Co nt ou rs

U

S Fe et

Ar tif ic ia l F ill af

Q ua te rn ar y

Al lu vi um

Q al

M ap

7:

A

VC

B oo ne

R ea ch a lig nm en t s ur fa ce g eo lo gy

R ai lw ay

Co m pa ny

I L Ranch Rd

St at e H w y

10 4480

TP

-2

0-

D H

-2 0-

D H

-2 1-

38°15'15" 38°15'10" 38°15'5" 38°15' 38°14'55"

38°15'15" 38°15'10" 38°15'5" 38°15' 38°14'55"

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 7'

-1

°1 7'

5"

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 6'

-1

°1 7'

-1

°1 7'

5" -1

°1

7'

F R

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IN

G P

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-A R

K A

N S

A S

P R

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C T, A R

K A

N S

A S

V A

L L

E Y

C O

N D

U

IT

B o o n e R e a ch

S u rf a ce G e o lo g y

U

SB

R

M B

G

IS

M

B G

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LO

G Y

N or th A m er ic an

D at um

(2

1) S ca le

:5 ,0 in ch

.6 fe et

U

S Fe et

Fi el d su rv ey d a ta p o in ts a n d g eo lo g ic m a p p in g fr o m

U

SB

R w it h

N A

IP

im a g er y.

D

EM

g en er a te d ve rti ca lc o nt o u r p ro fi le b y M

B G

IS

Le ge nd

AV

C

Bo on e Re ac h f t D ril l H ol e

Te st

P it

Co nt ou rs

U

S Fe et

Ar tif ic ia l F ill af

Q ua te rn ar y

Al lu vi um

Q al

Al lu vi al

T er ra ce

Q at

Cr et ac eo us

Pi er re S ha le

Kp

Sh al e

Pi er re S ha le

Kp

Li m es to ne

M ap

8:

A

VC

B oo ne

R ea ch a lig nm en t s ur fa ce g eo lo gy

Ra ilw ay Co m pa ny

M ai n St

E 1s t St

Church Ave

Higgins St

St at e H w y

TP

-2

2-

D H

-2 2-

TP

-2

2-

38°15'5" 38°15' 38°14'55" 38°14'50" 38°14'45"

38°15'5" 38°15' 38°14'55" 38°14'50" 38°14'45"

-1

°1 5'

-1

°1 5'

-1

°1 5'

-1

°1 5'

-1

°1 6'

-1

°1 6'

5" -1

°1

6'

-1

°1

6'

-1

°1

6'

-1

°1 5'

-1

°1 5'

-1

°1 5'

-1

°1 5'

-1

°1 6'

-1

°1 6'

5" -1

°1

6'

-1

°1

6'

-1

°1

6'

-1

°1

6'

F R

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IN

G P

A N

-A R

K A

N S

A S

P R

O

JE

C T, A R

K A

N S

A S

V A

L L

E Y

C O

N D

U

IT

B o o n e R e a ch

S u rf a ce G e o lo g y

U

SB

R

M B

G

IS

M

B G

EO

LO

G Y

N or th A m er ic an

D at um

(2

1) S ca le

:5 ,0 in ch

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U

S Fe et

Fi el d s u rv ey d a ta p o in ts a n d g eo lo g ic m a p p in g f ro m U

SB

R w it h N

A

IP

im a g er y.

D

EM

g en er a te d v er ti ca l c o nt o u r p ro fi le b y M

B G

IS

Le ge nd

AV

C

Bo on e Re ac h f t D ril l H ol e

Te st

P it

Co nt ou rs

U

S Fe et

Ar tif ic ia l F ill af

Q ua te rn ar y

Al lu vi um

Q al

Al lu vi al

T er ra ce

Q at

Cr et ac eo us

Pi er re S ha le

Kp

Sh al e

Pi er re S ha le

Kp

Li m es to ne

M ap

9:

A

VC

B oo ne

R ea ch a lig nm en t s ur fa ce g eo lo gy

R ai lw ay

C om pa ny

M ai n St

E 1s t St

E R ai lro ad

S t

St at e H w y

SBoone Ave

N Wilson Ave

NGerard Ave

S Higgins Ave

NBoone Ave

N Highland Ave

Sigler Ave

NBakerAve

S HighlandAve

Church Ave

SRussell Ave

SCollege Ave

SHughesAve

Higgins St

R ai lro ad

St

R us se llA ve

S Higgins Ave

D H

-2 2-

TP

-2

2-

D H

-2 2-

D H

-2 2-

D H

-2 2-

TP

-2

2-

D

H -2

2-

D H

-2 2-

38°15' 38°14'55" 38°14'50" 38°14'45" 38°14'40"

38°15' 38°14'55" 38°14'50" 38°14'45" 38°14'40"

-1

°1 5'

-1

°1 5'

5" -1

°1

5'

-1

°1

5'

-1

°1

5'

-1

°1

5'

-1

°1

5'

-1

°1

5'

-1

°1

5'

-1

°1 5'

-1

°1 5'

5" -1

°1

5'

-1

°1

5'

-1

°1

5'

-1

°1

5'

-1

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5'

-1

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-1

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5'

F R

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K A

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P R

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C T, A R

K A

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A S

V A

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E Y

C O

N D

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IT

B o o n e R e a ch

S u rf a ce G e o lo g y

U

SB

R

M B

G

IS

M

B G

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N or th A m er ic an

D at um

(2

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Fi el d s u rv ey d a ta p o in ts a n d g eo lo g ic m a p p in g fr o m U

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R w it h N

A

IP

im a g er y.

D

EM

g en er a te d v er ti ca l c o nt o u r p ro fi le b y M

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IS

Le ge nd

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C

Bo on e Re ac h ft

D ril l H ol e ft

D ril l H ol e ft

D ril l H ol e

Te st

Pi t

Co nt ou rs

U

S Fe et

Ar tif ic ia l F ill af

Q ua te rn ar y

Al lu vi um

Q al

Al lu vi al

T er ra ce

Q at

Cr et ac eo us

Pi er re Sh al e

(K p)

Sh al e

Pi er re Sh al e

(K p)

D ia ge ne si s an d Co nc re tio ns

M ap

0:

A

VC

B oo ne

R ea ch a lig nm en t s ur fa ce g eo lo gy

Qal

0.0 to 40.3 ft.

QUATERNARY ALLUVIUM (Qal):

0.0 to 0.35 ft. SANDY LEAN CLAY s(CL): Topsoil;

approximately 35% fine to medium sand, predominantly fine, subangular to subrounded;

approximately 65% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; dark brown; hard; weak HCl reaction; contains vegetation.

0.35 to 1.45 ft. SANDY LEAN CLAY s(CL):

Approximately 35% fine to medium sand, predominantly fine, subangular to subrounded;

approximately 65% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; dark brown; hard; 0.35 to 1.0 ft. weak HCl reaction, 1.0 to

1.45 ft. strong HCl reaction; contains trace woody organics/charcoal; 0.65 ft. 1/2-inch-thick lens of Clayey Sand SC.

1.45 to 3.8 ft. SANDY LEAN CLAY s(CL):

Approximately 40% fine to medium sand, predominantly fine, subangular to subrounded;

approximately 60% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; light brown; firm; strong HCl reaction.

3.8 to 4.7 ft. LEAN CLAY WITH SAND (CL)s:

Approximately 20% fine to medium sand, predominantly fine, subangular to subrounded;

approximately 80% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist;

brown; hard; no HCl reaction.

4.7 to 5.25 ft. CLAYEY SAND SC: Approximately 65% fine to medium sand, predominantly fine, subangular to subrounded; approximately 35% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; light brown; moderate cementation; strong HCl reaction.

s(CL)

(CL)s

SC

CL

SC

SP

SC

(CL)s

SM

SC

SM

SC

SP-SC

CL

SP-SC

CL

SP-SM

LOCATION:

CO-96, 0.6 mi west of N. Avondale Blvd, south ROW, N. Avondale, CO.

PURPOSE OF HOLE:

To collect geotechnical data for proposed Arkansas Valley Conduit (AVC) alignment and install an observation well.

DRILLED BY:

USBR - MB Drill Crew (MB-2300) Cody Kelly - Driller Pete Shawver - Helper Ryan Dedeker - Helper

DRILLING EQUIPMENT:

Truck Mounted CME-85 drill.

4.25-inch ID, 9.0-inch OD Heavy Duty Hollow Stem Augers (HSA).

4-inch OD split spoon core barrel with 2.63-inch ID, 4-inch OD core barrel shoe and metal catcher, mounted on NWJ rods via 4-inch OD bearing head.

CME automatic hammer with 2-feet-long, 1.5-inch ID, 2-inch OD SPT barrel with 1.375-inch ID SPT shoe and plastic catcher on NWJ rods.

CME automatic hammer with 1-foot-long, 2-inch ID, 2.5-inch OD California Sampler with 2-inch OD by 4-inch long brass liners and 1.93-inch ID shoe on NWJ rods.

DRILLING METHODS:

0.0 to 3.8 ft. - HSA with 3.8-feet continuous sample per ASTM D5784 and D6151. Performed SPT per ASTM D1586 and USBR 7105 at interval listed below.

3.8 to 40.3 ft. - HSA with 2.5-feet continuous samples per ASTM D5784 and D6151. Performed SPT or California Sampler test per ASTMs D1586 and D3550 and USBR 7105 at intervals listed below.

Coordinate System:

Colorado State Plane South (0503) US Survey Feet, NAD83

Continued next pageCOMMENTS:

All depths are feet below ground surface (bgs).

ID = inside diameter OD = outside diameter

ft. = feet depth HSA = Hollow Stem Auger SPT = Standard Penetration Test

CLASSIFICATION AND

NOTES

SHEET 1 OF 5

GROUND ELEVATION: 4522.2COORDINATES: N 1,583,193.9 E 3,329,094.1

STATE: Colorado

D E

P T

H

PHYSICAL CONDITION

DEPTH AND ELEV OF WATER

G E

O L.

U N

IT

S

Y M

S P

T

B

LO

W S

/F T

LEVEL AND DATE MEASURED: 20.2 (4542.43) 11/2/2022

C

O R

E R

E C

O V

E R

Y

PROJECT: Fryingpan-Arkansas

ANGLE FROM HORIZONTAL: -90 AZIMUTH: None

F

LD

C

LA

S

S /L

IT

H

GEOLOGIC LOG OF DRILL HOLE: DH-22-106

FEATURE: Arkansas Valley Conduit - Boone Reach

DEPTH TO BEDROCK: not encountered

LOCATION: CO-96, west of Avondale Blvd, N. Avondale, CO

BEGUN: 8/6/22 FINISHED: 8/6/22 TOTAL DEPTH: 40.3

HOLE LOGGED BY: E. Hammers

REVIEWED BY: C. Clark

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9DRAFT

Qal

5.25 to 5.35 ft. LEAN CLAY CL: Approximately 10% fine to medium sand, predominantly fine, subangular to subrounded; approximately 90% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; brown; hard; strong HCl reaction.

5.35 to 5.8 ft. CLAYEY SAND SC: Approximately 65% fine to medium sand, predominantly fine, subangular to subrounded; approximately 35% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; light brown; moderate cementation; strong HCl reaction.

5.8 to 6.0 ft. POORLY GRADED SAND SP:

Approximately 95% fine to medium sand, subangular to subrounded; approximately 5% nonplastic fines;

maximum size medium sand; moist; tan; weak cementation; strong HCl reaction.

6.0 to 6.5 ft. CLAYEY SAND SC: Approximately 85% fine to medium sand, predominantly fine, subangular to subrounded; approximately 15% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; light brown; moderate cementation; strong HCl reaction; contains micas.

6.5 to 7.3 ft. LEAN CLAY WITH SAND (CL)s:

Approximately 25% fine to medium sand, predominantly fine, subangular to subrounded;

approximately 75% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist;

brown; hard; strong HCl reaction.

7.3 to 9.45 ft. SILTY SAND SM: Approximately 85% fine to medium sand, predominantly fine, subangular to subrounded; approximately 15% nonplastic fines;

maximum size medium sand; moist; tan; weak cementation; strong HCl reaction; contains micas and CaCO3 precipitation.

9.45 to 9.75 ft. CLAYEY SAND SC: Approximately 70% fine to medium sand, predominantly fine, subangular to subrounded; approximately 30% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; tan; moderate cementation;

strong HCl reaction; contains micas.

9.75 to 14.6 ft. SILTY SAND SM: Approximately 85% fine to medium sand, predominantly fine, subangular to subrounded; approximately 15% nonplastic fines; maximum size medium sand; moist;

tan; weak cementation; strong to weak HCl reaction;

contains micas.

BOTTOM OF HOLE

SP-SM

s(CL)

SC

s(CL)

SC

(CL)s

SC

SM

CH

SPT & CALIFORNIA SAMPLER

INTERVALS AND RECOVERY:

3.8 to 5.3 ft. SPT No.1: 97%

6.3 to 7.8 ft. SPT No.2: 100%

8.8 to 10.3 ft. SPT No.3: 100%

11.3 to 12.8 ft. SPT No.4: 100%

13.8 to 15.3 ft. SPT No.5: 100%

16.3 to 17.8 ft. California No.1: 93%

18.8 to 20.3 ft. SPT No.6: 93%

21.3 to 22.8 ft. SPT No.7: 100%

23.8 to 25.3 ft. California No.2: 100%

26.3 to 27.8 ft. California No.3: 73%

28.8 to 30.3 ft. SPT No.8: 100%

31.3 to 32.8 ft. California No.4: 87%

33.8 to 35.3 ft. SPT No.9: 100%

36.3 to 37.8 ft. SPT No.10: 100%

38.8 to 40.3 ft. California No.5: 73%

SPT & CALIFORNIA SAMPLER

INTERVALS WITH BARREL SINK

PRIOR TO TESTING:

11.3 to 12.8 ft. SPT No.4: sank 0.1 ft.

13.8 to 15.3 ft. SPT No.5: sank 0.05 ft.

21.3 to 22.8 ft. SPT No.7: sank 0.05 ft.

23.8 to 25.3 ft. California No.2: sank

0.1 ft.

26.3 to 27.8 ft. California No.3: sank

0.2 ft.

28.8 to 30.3 ft. SPT No.8: sank 0.3 ft.

33.8 to 35.3 ft. SPT No.9: sank 0.3 ft.

36.3 to 37.8 ft. SPT No.10: sank 0.3 ft.

38.8 to 40.3 ft. California No.5: sank

0.1 ft.

SPT SAMPLES SUBMITTED TO

LAB:

11.3 to 12.8 ft. SPT No.4

33.8 to 35.3 ft. SPT No.9

DRILLING FLUID:

No water added during HSA drilling.

HOLE COMPLETION:

Installed observation monitoring well per ASTM D5092, D5521, and D5784.

Observation well developed utilizing surging and dual air-lift techniques in accordance with ASTM D5521.

40.3 to 22.6 ft. - Backfilled hole with 10/20 silica sand.

22.6 to 22.0 ft. - Installed well sump using blank 2-inch SCH 40 PVC.

22.0 to 17.0 ft. - Installed .010 screen 2-inch SCH 40 PVC.

17.0 to 0.18 ft. - Installed blank 2-inch

SCH 40 PVC.

22.6 to 15.0 ft. - Backfilled hole with 20/40 silica sand for screening.

15.0 to 3.0 ft. - Backfilled hole with medium bentonite chips.

CLASSIFICATION AND

NOTES

SHEET 2 OF 5

GROUND ELEVATION: 4522.2COORDINATES: N 1,583,193.9 E 3,329,094.1

STATE: Colorado

D E

P T

H

PHYSICAL CONDITION

DEPTH AND ELEV OF WATER

G E

O L.

U N

IT

S

Y M

S P

T

B

LO

W S

/F T

LEVEL AND DATE MEASURED: 20.2 (4542.43) 11/2/2022

C

O R

E R

E C

O V

E R

Y

PROJECT: Fryingpan-Arkansas

ANGLE FROM HORIZONTAL: -90 AZIMUTH: None

F

LD

C

LA

S

S /L

IT

H

GEOLOGIC LOG OF DRILL HOLE: DH-22-106

FEATURE: Arkansas Valley Conduit - Boone Reach

DEPTH TO BEDROCK: not encountered

LOCATION: CO-96, west of Avondale Blvd, N. Avondale, CO

BEGUN: 8/6/22 FINISHED: 8/6/22 TOTAL DEPTH: 40.3

HOLE LOGGED BY: E. Hammers

REVIEWED BY: C. Clark

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24DRAFT

Lab Test Data: 11.3 to 12.8 ft. 12.0% fines, 88.0% sand, nonplastic, Cu=5.38, Cc=1.38, MC=2.8%, Lab Classification = Poorly Graded Sand with Silt

SP-SM.

14.6 to 16.65 ft. CLAYEY SAND SC: Approximately 75% fine to medium sand, subangular to subrounded; approximately 25% fines with medium dry strength, no dilatancy, low to medium plasticity, and medium toughness; maximum size medium sand; moist; brown; moderate cementation; strong HCl reaction; contains micas.

16.65 to 17.0 ft. CLAYEY SAND SC: Approximately 70% fine to coarse sand, predominantly medium, hard, subangular to subrounded; approximately 30% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size coarse sand; moist; light brown; moderate cementation; no HCl reaction.

17.0 to 17.25 ft. POORLY GRADED SAND WITH CLAY SP-SC: Approximately 90% fine to coarse sand, predominantly medium, hard, subangular to subrounded; approximately 10% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size coarse sand;

moist; tan; weak cementation; no HCl reaction.

17.25 to 17.45 ft. LEAN CLAY CL: Approximately 10% fine to medium sand, predominantly fine, subangular to subrounded; approximately 90% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; brown; firm; strong HCl reaction.

17.45 to 18.1 ft. POORLY GRADED SAND WITH CLAY SP-SC: Approximately 90% fine to coarse sand, predominantly medium, hard, subangular to subrounded; approximately 10% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size coarse sand;

moist; tan; weak cementation; no HCl reaction; 17.85

ft. 1/2-inch-thick lens of Lean Clay with Sand (CL)s.

18.1 to 18.3 ft. LEAN CLAY CL: Approximately 10% fine to medium sand, predominantly fine, subangular to subrounded; approximately 90% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; brown; firm; strong HCl reaction.

18.3 to 21.5 ft. POORLY GRADED SAND WITH SILT SP-SM: Approximately 5% fine gravel, hard, subangular to subrounded; approximately 85% fine to coarse sand, predominantly medium, hard, subangular to subrounded; approximately 10% nonplastic fines; maximum size 3/8-inch; moist; light brown; weak cementation; no HCl reaction.

3.0 to 1.0 ft. - Backfilled hole with 10/20 silica sand.

1.0 to 0.0 ft. - Concrete with observation well flush mount vault.

11 bags 50lb 10/20 silica sand.

6 bags 50lb 20/40 silica sand.

6 bags 50lb medium bentonite chips.

2 bags 80lb concrete.

6-inch by 10-inch flush mount and locking well cap.

DRILLING CONDITIONS &

COMMENTS:

None.

WATER LEVELS:

8/6/2022 - 23.1 ft. bgs during drilling.

8/7/2022 - 18.2 ft. bgs before observation well installation.

8/9/2022 - 20.05 ft. bgs during well development.

11/2/2022 - 20.2 ft. bgs during random sounding.

CLASSIFICATION AND

NOTES

SHEET 3 OF 5

GROUND ELEVATION: 4522.2COORDINATES: N 1,583,193.9 E 3,329,094.1

STATE: Colorado

D E

P T

H

PHYSICAL CONDITION

DEPTH AND ELEV OF WATER

G E

O L.

U N

IT

S

Y M

S P

T

B

LO

W S

/F T

LEVEL AND DATE MEASURED: 20.2 (4542.43) 11/2/2022

C

O R

E R

E C

O V

E R

Y

PROJECT: Fryingpan-Arkansas

ANGLE FROM HORIZONTAL: -90 AZIMUTH: None

F

LD

C

LA

S

S /L

IT

H

GEOLOGIC LOG OF DRILL HOLE: DH-22-106

FEATURE: Arkansas Valley Conduit - Boone Reach

DEPTH TO BEDROCK: not encountered

LOCATION: CO-96, west of Avondale Blvd, N. Avondale, CO

BEGUN: 8/6/22 FINISHED: 8/6/22 TOTAL DEPTH: 40.3

HOLE LOGGED BY: E. Hammers

REVIEWED BY: C. Clark

LO

G

A V

C B

R D

H

2.

G P

J L

O G

_2 .G

D T

/6

/2

3 DRAFT

21.5 to 23.9 ft. SANDY LEAN CLAY s(CL):

Approximately 30% fine sand, subangular to subrounded; approximately 70% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size fine sand; 21.5 to

23.1 ft. moist, 23.1 to 23.8 ft. wet; brown; firm; strong HCl reaction.

23.9 to 24.8 ft. CLAYEY SAND SC: Approximately 65% fine to medium sand, predominantly fine, subangular to subrounded; approximately 35% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; wet; brown; moderate cementation;

strong HCl reaction; contains micas.

24.8 to 25.15 ft. SANDY LEAN CLAY s(CL):

Approximately 45% fine to medium sand, predominantly fine, subangular to subrounded;

approximately 55% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; wet; brown;

firm; strong HCl reaction; contains micas.

25.15 to 28.5 ft. SANDY LEAN CLAY s(CL):

Approximately 40% fine sand, subangular to subrounded; approximately 60% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size fine sand; moist;

brown; 25.15 to 26.3 ft. hard, 26.3 to 28.5 ft. firm;

strong HCl reaction; contains micas.

28.5 to 28.9 ft. CLAYEY SAND SC: Approximately 65% fine to coarse sand, predominantly medium, hard, subangular to subrounded; approximately 35% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size coarse sand; wet; brown; moderate cementation;

weak HCl reaction.

28.9 to 35.4 ft. LEAN CLAY WITH SAND (CL)s:

Approximately 20% fine sand, subangular to subrounded; approximately 80% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size fine sand; moist;

gray-brown; firm; strong HCl reaction; contains micas.

Lab Test Data: 33.8 to 35.3 ft. 97.0% fines, 3.0% sand, LL=32.7, PI=18.7, MC=22.9%, Lab Classification = Lean Clay CL.

35.4 to 36.0 ft. CLAYEY SAND SC: Approximately 55% fine to medium sand, predominantly fine, subangular to subrounded; approximately 45% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; wet; light brown; moderate cementation; weak HCl reaction.

CLASSIFICATION AND

NOTES

SHEET 4 OF 5

GROUND ELEVATION: 4522.2COORDINATES: N 1,583,193.9 E 3,329,094.1

STATE: Colorado

D E

P T

H

PHYSICAL CONDITION

DEPTH AND ELEV OF WATER

G E

O L.

U N

IT

S

Y M

S P

T

B

LO

W S

/F T

LEVEL AND DATE MEASURED: 20.2 (4542.43) 11/2/2022

C

O R

E R

E C

O V

E R

Y

PROJECT: Fryingpan-Arkansas

ANGLE FROM HORIZONTAL: -90 AZIMUTH: None

F

LD

C

LA

S

S /L

IT

H

GEOLOGIC LOG OF DRILL HOLE: DH-22-106

FEATURE: Arkansas Valley Conduit - Boone Reach

DEPTH TO BEDROCK: not encountered

LOCATION: CO-96, west of Avondale Blvd, N. Avondale, CO

BEGUN: 8/6/22 FINISHED: 8/6/22 TOTAL DEPTH: 40.3

HOLE LOGGED BY: E. Hammers

REVIEWED BY: C. Clark

LO

G

A V

C B

R D

H

2.

G P

J L

O G

_2 .G

D T

/6

36.0 37.15 ft. SILTY SAND SM: Approximately 85% fine to coarse sand, predominantly medium, hard, subangular to subrounded; approximately 15% fines with low dry strength, rapid dilatancy, low plasticity, and low toughness; maximum size medium sand;

wet; light brown; weak cementation; no HCl reaction.

37.15 to 40.3 ft. FAT CLAY CH: Approximately 10% fine sand, subangular to subrounded; approximately 90% fines with high dry strength, no dilatancy, high plasticity, and high toughness; maximum size medium sand; moist; gray-brown with gray and red mottling; firm; strong HCl reaction.

CLASSIFICATION AND

NOTES

SHEET 5 OF 5

GROUND ELEVATION: 4522.2COORDINATES: N 1,583,193.9 E 3,329,094.1

STATE: Colorado

D E

P T

H

PHYSICAL CONDITION

DEPTH AND ELEV OF WATER

G E

O L.

U N

IT

S

Y M

S P

T

B

LO

W S

/F T

LEVEL AND DATE MEASURED: 20.2 (4542.43) 11/2/2022

C

O R

E R

E C

O V

E R

Y

PROJECT: Fryingpan-Arkansas

ANGLE FROM HORIZONTAL: -90 AZIMUTH: None

F

LD

C

LA

S

S /L

IT

H

GEOLOGIC LOG OF DRILL HOLE: DH-22-106

FEATURE: Arkansas Valley Conduit - Boone Reach

DEPTH TO BEDROCK: not encountered

LOCATION: CO-96, west of Avondale Blvd, N. Avondale, CO

BEGUN: 8/6/22 FINISHED: 8/6/22 TOTAL DEPTH: 40.3

HOLE LOGGED BY: E. Hammers

REVIEWED BY: C. Clark

LO

G

A V

C B

R D

H

2.

G P

J L

O G

_2 .G

D T

/6

NP

Q a

1-

1-

0.0

2.3

C S

S P

T C

S S

P T

C S

S P

T C

S S

P T

NP

23.8

89.8

76.2

7.9

4.2

(CL) Lean CLAY with Sand; brown (10YR 4/3); dry; firm; 76% very high dry strength, slow dilatancy, medium toughness, high plasticity fines; 24% fine to medium, well-rounded, quartz, quartzose, lithic, carbonate sand; strong reaction to HCl;

laminated to very thinly bedded; very thin poorly graded sand interbeds from 1.8' to 2.0' (0.0' to 4.2') Maximum Size: coarse sand

(SP-SM) Poorly Graded SAND with Silt; pale brown (10YR 6/3); dry; medium dense;

90% fine to coarse, well-rounded, quartz, quartzose, lithic, carbonate sand; 2% fine to coarse, well-rounded, quartz, quartzose, lithic, carbonate gravel; 8% non-plastic fines; weak reaction to HCl; massive (4.2' to 10.2') Maximum Size: fine gravel

LLW

at er G ra ph ic D ep th

, f t

(b gl

Latitude (°): 38.2618

Longitude (°): -104.3500

G eo lo gi c U ni t

Client:

Location:

Bureau of Reclamation

Colorado

HardnessAtterberg Limits

R ec ov er y, R Q

D

Date Commenced:11/9/2013

Date Completed: 11/9/2013

Date Backfilled: 11/9/2013

Checked by: K. Adams

Project:

Project No.:

Arkansas Valley Conduit

04.79224200

BOREHOLE LOG

S am pl e

N um be r

G ra ve l (

Inclination/Bearing: 90

Depth to Bedrock (ft): >50

Surface Level (ft): 4547

Total Drill Depth (ft): 50

D ril l T im e (m in ) Lab Results

H

H

H

H

H

H

H

Discontinuity Description and Additional Data

Hole Id:

Drill Rig: CME 850

Notes:

Coordinates and ground surface elevations were collected in the field with a hand-held GPS. Latitude and longitude are reported as Geographic Coordinate System NAD 1983.

A companion drill hole was advanced about 5 feet from this drill hole to install a groundwater monitoring well. Refer to well completion information for more detail.

Fugro Consultants, Inc.

S P

T R ec or d

N -V al ue

S am pl e

T yp e

Depth to Water (ft): 38.5

PI

Drilling Type: H.S.A/NQ

Drilled by: N. McVay

Logged by: T. Glidden

G ra ph ic

L og

M oi st ur e

S an d

F in es

D ep th to

C on ta ct ft)

Material Description

A V

C L

O G

E

N G

LI

S

H

A V

C

-S

C H

3.

G

P J

F U

G R

O

.G

D T

/2

6/

Sheet: 1 of 5

Q a

1-

1-

0.0

0.0

C S

S P

T C

S S

P T

C S

S P

T C

S S

P T

36.1

17.9

63.9

82.1

10.2

13.6

14.3

16.0

(CL) Sandy Lean CLAY; pale brown (2.5Y 7/4); moist; firm; 64% very high dry strength, slow dilatancy, medium toughness, medium plasticity fines; 36% fine, well-rounded, quartz sand; no reaction to HCl; laminated to very thinly bedded;

very thin silty sand beds at 11.5' and 11.7' (10.2' to 13.6') Maximum size: medium sand

(CL) Lean CLAY with Sand; light yellowish brown (2.5Y 6/3); moist; firm; 82% very high dry strength, no dilatancy, high toughness, high plasticity fines; 18% fine, well-rounded, quartz, quartzose, lithic sand;

weak reaction to HCl; laminated (13.6' to 14.3') Maximum size: medium sand

(CL) Sandy Lean CLAY as above (14.3' to 16.0')

(SP) Poorly Graded SAND; light yellowish brown (10YR 6/4); moist; loose; 95-100% fine, well-rounded, quartz, quartzose sand;

trace non-plastic fines; no reaction to HCl;

laminated (16.0' to 24.3') Maximum Size:

fine sand

LLW

at er G ra ph ic D ep th

, f t

(b gl

Latitude (°): 38.2618

Longitude (°): -104.3500

G eo lo gi c U ni t

Client:

Location:

Bureau of Reclamation

Colorado

HardnessAtterberg Limits

R ec ov er y, R Q

D

Date Commenced:11/9/2013

Date Completed: 11/9/2013

Date Backfilled: 11/9/2013

Checked by: K. Adams

Project:

Project No.:

Arkansas Valley Conduit

04.79224200

BOREHOLE LOG

S am pl e

N um be r

G ra ve l (

Inclination/Bearing: 90

Depth to Bedrock (ft): >50

Surface Level (ft): 4547

Total Drill Depth (ft): 50

D ril l T im e (m in ) Lab Results

H

H

H

H

H

H

H

Discontinuity Description and Additional Data

Hole Id:

Drill Rig: CME 850

Notes:

Coordinates and ground surface elevations were collected in the field with a hand-held GPS. Latitude and longitude are reported as Geographic Coordinate System NAD 1983.

A companion drill hole was advanced about 5 feet from this drill hole to install a groundwater monitoring well. Refer to well completion information for more detail.

Fugro Consultants, Inc.

S P

T R ec or d

N -V al ue

S am pl e

T yp e

Depth to Water (ft): 38.5

PI

Drilling Type: H.S.A/NQ

Drilled by: N. McVay

Logged by: T. Glidden

G ra ph ic

L og

M oi st ur e

S an d

F in es

D ep th to

C on ta ct ft)

Material Description

A V

C L

O G

E

N G

LI

S

H

A V

C

-S

C H

3.

G

P J

F U

G R

O

.G

D T

/2

6/

Sheet: 2 of 5

Q

C S

S P

T C

S S

P T

24.3

29.5

(CH) Fat CLAY; light olive brown (10YR 5/3);

moist; firm; 100% no dilatancy, high toughness, high plasticity fines; weak reaction to HCl; laminated (24.3' to 29.5') Maximum Size: fines

(CL) Lean CLAY; yellowish brown (10YR 5/4); moist; soft; 95-100% high dry

LLW

at er G ra ph ic D ep th

, f t

(b gl

Latitude (°): 38.2618

Longitude (°): -104.3500

G eo lo gi c U ni t

Client:

Location:

Bureau of Reclamation

Colorado

HardnessAtterberg Limits

R ec ov er y, R Q

D

Date Commenced:11/9/2013

Date Completed: 11/9/2013

Date Backfilled: 11/9/2013

Checked by: K. Adams

Project:

Project No.:

Arkansas Valley Conduit

04.79224200

BOREHOLE LOG

S am pl e

N um be r

G ra ve l (

Inclination/Bearing: 90

Depth to Bedrock (ft): >50

Surface Level (ft): 4547

Total Drill Depth (ft): 50

D ril l T im e (m in ) Lab Results

H

H

H

H

H

H

H

Discontinuity Description and Additional Data

Hole Id:

Drill Rig: CME 850

Notes:

Coordinates and ground surface elevations were collected in the field with a hand-held GPS. Latitude and longitude are reported as Geographic Coordinate System NAD 1983.

A companion drill hole was advanced about 5 feet from this drill hole to install a groundwater monitoring well. Refer to well completion information for more detail.

Fugro Consultants, Inc.

S P

T R ec or d

N -V al ue

S am pl e

T yp e

Depth to Water (ft): 38.5

PI

Drilling Type: H.S.A/NQ

Drilled by: N. McVay

Logged by: T. Glidden

G ra ph ic

L og

M oi st ur e

S an d

F in es

D ep th to

C on ta ct ft)

Material Description

A V

C L

O G

E

N G

LI

S

H

A V

C

-S

C H

3.

G

P J

F U

G R

O

.G

D T

/2

6/

Sheet: 3 of 5

38.5' to 43.5' overcore recovery is single 3.5-inch gravel

C S

S P

T C

S S

P T

33.2

38.5 strength, slow dilatancy, medium toughness, high plasticity fines; trace fine sand; weak reaction to HCl; laminated (29.5' to 33.2') Maximum Size: fine sand

(CH) Fat CLAY as above from 24.3' to 29.5' (33.2' to 38.5')

(SP) Poorly Graded SAND; brown (10YR 3/3); wet; medium dense; 95% fine to coarse, well-rounded, quartz, quartzose, lithic, carbonate sand; trace fine, well-rounded, quartz, quartzose, lithic, carbonate gravel; trace non-plastic fines;

no reaction to HCl except at carbonate

LLW

at er G ra ph ic D ep th

, f t

(b gl

Latitude (°): 38.2618

Longitude (°): -104.3500

G eo lo gi c U ni t

Client:

Location:

Bureau of Reclamation

Colorado

HardnessAtterberg Limits

R ec ov er y, R Q

D

Date Commenced:11/9/2013

Date Completed: 11/9/2013

Date Backfilled: 11/9/2013

Checked by: K. Adams

Project:

Project No.:

Arkansas Valley Conduit

04.79224200

BOREHOLE LOG

S am pl e

N um be r

G ra ve l (

Inclination/Bearing: 90

Depth to Bedrock (ft): >50

Surface Level (ft): 4547

Total Drill Depth (ft): 50

D ril l T im e (m in ) Lab Results

H

H

H

H

H

H

H

Discontinuity Description and Additional Data

Hole Id:

Drill Rig: CME 850

Notes:

Coordinates and ground surface elevations were collected in the field with a hand-held GPS. Latitude and longitude are reported as Geographic Coordinate System NAD 1983.

A companion drill hole was advanced about 5 feet from this drill hole to install a groundwater monitoring well. Refer to well completion information for more detail.

Fugro Consultants, Inc.

S P

T R ec or d

N -V al ue

S am pl e

T yp e

Depth to Water (ft): 38.5

PI

Drilling Type: H.S.A/NQ

Drilled by: N. McVay

Logged by: T. Glidden

G ra ph ic

L og

M oi st ur e

S an d

F in es

D ep th to

C on ta ct ft)

Material Description

A V

C L

O G

E

N G

LI

S

H

A V

C

-S

C H

3.

G

P J

F U

G R

O

.G

D T

/2

6/

Sheet: 4 of 5

43.5' to 48.5' no recovery in overcore final blow count likely inflated by gravel in shoe; no recovery in 48.5' to 50' overcore

C S

S P

T C

S S

P T clasts (38.5' to 50') Maximum Size: fine gravel

Boring terminated at 50.0 ft.

LLW

at er G ra ph ic D ep th

, f t

(b gl

Latitude (°): 38.2618

Longitude (°): -104.3500

G eo lo gi c U ni t

Client:

Location:

Bureau of Reclamation

Colorado

HardnessAtterberg Limits

R ec ov er y, R Q

D

Date Commenced:11/9/2013

Date Completed: 11/9/2013

Date Backfilled: 11/9/2013

Checked by: K. Adams

Project:

Project No.:

Arkansas Valley Conduit

04.79224200

BOREHOLE LOG

S am pl e

N um be r

G ra ve l (

Inclination/Bearing: 90

Depth to Bedrock (ft): >50

Surface Level (ft): 4547

Total Drill Depth (ft): 50

D ril l T im e (m in ) Lab Results

H

H

H

H

H

H

H

Discontinuity Description and Additional Data

Hole Id:

Drill Rig: CME 850

Notes:

Coordinates and ground surface elevations were collected in the field with a hand-held GPS. Latitude and longitude are reported as Geographic Coordinate System NAD 1983.

A companion drill hole was advanced about 5 feet from this drill hole to install a groundwater monitoring well. Refer to well completion information for more detail.

Fugro Consultants, Inc.

S P

T R ec or d

N -V al ue

S am pl e

T yp e

Depth to Water (ft): 38.5

PI

Drilling Type: H.S.A/NQ

Drilled by: N. McVay

Logged by: T. Glidden

G ra ph ic

L og

M oi st ur e

S an d

F in es

D ep th to

C on ta ct ft)

Material Description

A V

C L

O G

E

N G

LI

S

H

A V

C

-S

C H

3.

G

P J

F U

G R

O

.G

D T

/2

6/

Sheet: 5 of 5

LOGGED BY: Nate McVay PROJECT:

DRILLER: Nate McVay LAT: BORING ID:

DRILL RIG: 850 CME LONG: MW ID:

METHOD: HSA 24' DATE COMPLETED:

DEPTH TO WATER (FT)

1. Specification of all Materials Used

2. Depths of backfill material

3. Quantities of backfill used (# of bags OK)

4. Size of bolts that secure man-hole lid and other

5. Instructions to open the well

TOC = Top of Casing; ID = Inner Diameter, GS = Ground Surface

MW-511

Arkansas Valley Conduit - Well Completion Form Arkansas Valley Conduit

B511

5/8/2014

COORDINATES (WGS 84) ELEVATIONS (FEET)

GROUND SURFACE:

PVC CASING (TOP):

DATE/TIME MEASURED

WATER LEVEL

TOTAL DEPTH OF WELL (FT):

Arkansas Valley Conduit

MW - 511

SKETCH OF COMPLETED WELL

*NOT TO SCALE

Required Details:

10"

11"

Bentonite chips

Screen

Bentonite Pellets

Filter Pack Sand

Well Casing

Manhole and cover

Concrete

10'10"

22' 7" 24'

9"

Bentonite Pellets 8'2"

Materials List 1). Concrete: 2 80lb bags 2). Sand: 11 bags 3). Bentonite Chips: 3 bags 4). Bentonite Tablets: 1 bucket 5). 10'x2" Sch 40 Well Pipe: 1 6). 10'x2" Sch 40 Well Pipe: 1 7). Well Cap: 1 8). Wellpoint Bottom: 1 9). Manhole and Cap: 1

Well Cap bolt size = 9/16"

No special instructure to open well

21' 2" 21' 10"

Qal

0.0 to 23.7 ft.

QUATERNARY ALLUVIUM (Qal):

0.0 to 4.7 ft. No Recovery: No recovery during pilot bit drilling to align HSA.

4.7 to 20.8 ft. Silty Sand SM: Approximately 80 to 85% fine to medium, predominantly fine, subangular to subrounded sand, max size medium sand;

approximately 15 to 20% nonplastic fines with low dry strength and slow to rapid dilatancy; moist, tan, soft, no HCl reaction.

Lab Test Data: 4.7 to 6.2 ft. 9.0% fines, 91.0% sand, nonplastic, MC=2.1%, Lab Classification = Poorly Graded Sand with Silt SP-SM.

Lab Test Data: Sample No. 72D-178 8.2 to 8.7 ft.

9.1% fines, 90.9% sand, Coefficient of Uniformity=3.59, Coefficient of Curvature=1.23, nonplastic, MC=2.4%, Dry Unit Weight (pcf)=109.6, Lab Classification = Poorly Graded Sand with Silt

SP-SM.

Lab Test Data: 9.7 to 11.2 ft. 17.0% fines, 83.0% sand, nonplastic, MC=3.1%, Lab Classification = Silty Sand SM.

Lab Test Data: 11.7 to 12.2 ft. 7.0% fines, 93.0% sand, nonplastic, MC=1.5%, Lab Classification = Poorly Graded Sand with Silt (SP-SM).

Lab Test Data: 12.2 to 13.7 ft. 13.0% fines, 87.0% sand, nonplastic, MC=1.9%, Lab Classification = Silty Sand SM.

Lab Test Data: 14.7 to 16.2 ft. 23.0% fines, 77.0% sand, nonplastic, MC=3.4%, Lab Classification = Silty Sand SM.

Lab Test Data: 17.2 to 17.7 ft. 17.0% fines, 83.0% sand, nonplastic, MC=2.4%, Lab Classification = Silty Sand SM.

BOTTOM OF HOLE

nr

SM

CH

LOCATION:

CDOT ROW on CO-96 0.2 mi. west of N. Avondale Rd, south side, Avondale, CO.

PURPOSE OF HOLE:

To collect geotechnical data for proposed Arkansas Valley Conduit (AVC) pipe alignment.

DRILLER:

USBR - CPN Region Kyler Wallin Josh Leader Jeff Carrick

DRILLING EQUIPMENT:

Track Carrier Mounted CME-850X drill.

6.25" ID, 10.5" OD Hollow Stem Augers

(HSA).

5.38" ID, 6" OD split spoon core barrel with 5" ID, 6" OD core barrel shoe and metal catcher, mounted on NWJ rods via 6" OD bearing head.

CME automatic hammer with 2' long, 1.5" ID, 2" OD SPT barrel with 1.375" ID SPT shoe and plastic catcher on NWJ rods.

CME automatic hammer with 2' long, 2" ID, 2.5" OD California Sampler with 2" OD by 6" long brass liners and 1.87" ID shoe on NWJ rods.

DRILLING METHODS:

0.0 to 4.7 ft. - Pilot bit drilled hole to align augers.

4.7 to 23.7 ft. - HSA with continuous sampler per ASTM D5784 and D6151.

Performed SPT or California Sampler test per ASTMs D1586 and D3550 and USBR 7105 at intervals listed below.

Coordinate System:

Colorado State Plane South (0503) US Survey Feet, NAD83

Continued next pageCOMMENTS:

All depths are feet below ground surface (bgs).

ID = inside diameter OD = outside diameter pr = poor recovery nr = no recovery HSA = Hollow Stem Auger SPT = Standard Penetration Test

CLASSIFICATION AND

NOTES

SHEET 1 OF 2

GROUND ELEVATION: 4522.1COORDINATES: N 1,583,106.1 E 3,329,444.2

STATE: Colorado

D E

P T

H

PHYSICAL CONDITION

DEPTH AND ELEV OF WATER

G E

O L.

U N

IT

S

Y M

S P

T

B

LO

W S

/F T

LEVEL AND DATE MEASURED: not encountered

C

O R

E R

E C

O V

E R

Y

PROJECT: Fryingpan-Arkansas

ANGLE FROM HORIZONTAL: -90 AZIMUTH: None

F

LD

C

LA

S

S /L

IT

H

GEOLOGIC LOG OF DRILL HOLE: DH-20- 9

FEATURE: Arkansas Valley Conduit - Boone Reach

DEPTH TO BEDROCK: not encountered

LOCATION: CO-96 0.2mi W of N. Avondale Rd, Avondale, CO

BEGUN: 10/13/20 FINISHED: 10/13/20 TOTAL DEPTH: 23.7

HOLE LOGGED BY: E. HAMMERS

REVIEWED BY: C. Clark

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Lab Test Data: 17.2 to 18.7 ft. 14.0% fines, 86.0% sand, nonplastic, MC=2.2%, Lab Classification = Silty Sand SM.

Lab Test Data: 19.7 to 20.8 ft. 9.0% fines, 91.0% sand, nonplastic, Cu=4.50, Cc=1.24, MC=2.3%, Lab Classification = Poorly Graded Sand with Silt

SP-SM.

20.8 to 23.7 ft. Fat Clay CH: Approximately 95% fines with high dry strength, no dilatancy, medium to high toughness, and medium to high plasticity;

approximately 5% fine, subangular to subrounded sand, max size fine sand; moist, moderate brown with oxidized stringers, homogeneous, hard, contains translucent to white microcrystals (no HCl reaction), strong HCl reaction.

Lab Test Data: 20.8 to 21.2 ft. 70.0% fines, 30.0% sand, LL=27.9, PI=9.0, MC=16.9%, Lab Classification = Sandy Lean Clay s(CL).

Lab Test Data: 21.7 to 22.2 ft. 97.0% fines, 3.0% sand, LL=64.7, PI=43.6, MC=21.7%, Lab Classification = Fat Clay CH.

SPT & CALIFORNIA SAMPLER

INTERVALS:

4.7 to 6.2 ft. SPT No.1

7.2 to 8.7 ft. California Sample No.1

9.7 to 11.2 ft. SPT No.2

12.2 to 13.7 ft. SPT No.3

14.7 to 16.2 ft. SPT No.4

17.2 to 18.7 ft. SPT No.5

19.7 to 21.2 ft. SPT No.6

22.2 to 23.7 ft. California Sample No.2

SPT & CALIFORNIA SAMPLER

INTERVALS WITH BARREL SINK

PRIOR TO TESTING:

4.7 to 6.2 ft. SPT No.1 - sank 0.05 ft.

7.2 to 8.7 ft. California Sample No.1 -sank 0.15 ft.

12.2 to 13.7 ft. SPT No.3 - sank 0.1 ft.

14.7 to 16.2 ft. SPT No.4 - sank 0.1 ft.

17.2 to 18.7 ft. SPT No.5 - sank 0.15 ft.

19.7 to 21.2 ft. SPT No.6 - sank 0.05 ft.

22.2 to 23.7 ft. California Sample No.2 -sank 0.1 ft.

DRILLING FLUID:

No water added to hole during drilling.

HOLE COMPLETION:

23.7 to 0.0 ft. - Backfilled hole with cuttings.

No observation well installed due to not encountering groundwater within 15 ft.

bgs.

DRILLING CONDITIONS &

COMMENTS:

7.2 to 8.7 ft. - California Sample No.1 brass liners damaged due to excessive radial and linear clearances within sampler barrel.

WATER LEVELS:

Not encountered.

CLASSIFICATION AND

NOTES

SHEET 2 OF 2

GROUND ELEVATION: 4522.1COORDINATES: N 1,583,106.1 E 3,329,444.2

STATE: Colorado

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PHYSICAL CONDITION

DEPTH AND ELEV OF WATER

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LEVEL AND DATE MEASURED: not encountered

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PROJECT: Fryingpan-Arkansas

ANGLE FROM HORIZONTAL: -90 AZIMUTH: None

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GEOLOGIC LOG OF DRILL HOLE: DH-20- 9

FEATURE: Arkansas Valley Conduit - Boone Reach

DEPTH TO BEDROCK: not encountered

LOCATION: CO-96 0.2mi W of N. Avondale Rd, Avondale, CO

BEGUN: 10/13/20 FINISHED: 10/13/20 TOTAL DEPTH: 23.7

HOLE LOGGED BY: E. HAMMERS

REVIEWED BY: C. Clark

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Qal

0.0 to 40.3 ft.

QUATERNARY ALLUVIUM (Qal):

0.0 to 0.3 ft. LEAN CLAY WITH SAND (CL)s:

Approximately 15% fine to medium sand, predominantly fine, subangular to subrounded;

approximately 85% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist;

brown; firm; strong HCl reaction.

0.3 to 1.2 ft. SILTY SAND SM: Approximately 75% fine to medium sand, subangular to subrounded;

approximately 25% nonplastic fines; maximum size medium sand; moist; tan; weak cementation; no HCl reaction.

1.2 to 3.9 ft. SANDY LEAN CLAY s(CL):

Approximately 30% fine to medium sand, predominantly fine, subangular to subrounded;

approximately 70% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist;

brown; firm; strong HCl reaction.

3.9 to 12.95 ft. CLAYEY SAND SC: Trace fine gravel, hard, subangular to subrounded;

approximately 80% fine to coarse sand, predominantly medium, hard, subangular to subrounded; approximately 20% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size 1/2-inch; moist;

tan; moderate to predominantly weak cementation;

variable weak to strong HCl reaction; contains CaCO3 precipitation.

Lab Test Data: 8.8 to 10.3 ft. % fines, % sand, LL=, PI=, MC=%, Lab Classification = .

12.95 to 14.2 ft. CLAYEY SAND SC: Approximately 75% fine to medium sand, predominantly fine, subangular to subrounded; approximately 25% fines with medium dry strength, no dilatancy, medium plasticity, and medium toughness; maximum size medium sand; moist; brown; weak to moderate cementation; strong HCl reaction.

(CL)s

SM

s(CL)

SC

CL

SP

CL

SP

CL

s(CL)

CL

LOCATION:

CO-96, 325 ft east of N. Avondale Blvd, north ROW, N. Avondale, CO.

PURPOSE OF HOLE:

To collect geotechnical data for proposed Arkansas Valley Conduit (AVC) alignment and install an observation well.

DRILLED BY:

USBR - MB Drill Crew (MB-2300) Cody Kelly - Driller Ryan Dedeker - Helper

DRILLING EQUIPMENT:

Truck Mounted CME-85 drill.

4.25-inch ID, 9.0-inch OD Heavy Duty Hollow Stem Augers (HSA).

4-inch OD split spoon core barrel with 2.63-inch ID, 4-inch OD core barrel shoe and metal catcher, mounted on NWJ rods via 4-inch OD bearing head.

CME automatic hammer with 2-feet-long, 1.5-inch ID, 2-inch OD SPT barrel with 1.375-inch ID SPT shoe and plastic catcher on NWJ rods.

CME automatic hammer with 1-foot-long, 2-inch ID,…