DRAFT_140R4025R0016_Attachment_5_-_00_00_02A_GeologyLogs-B_G1-G34_02-14-2025_2.pdf

PDF 5 MB Posted May 16, 2025

Attached to: NGWSP PUMPING PLANT 1
Solicitation number: 140R4025R0016
Issued by: Department of the Interior Bureau of Reclamation

About this file

Written by GovTribe AI · May 16, 2025

This file contains detailed geologic drill logs and test pit reports for the Navajo Gallup Water Supply Project (NGWSP) Pumping Plant 1 located in New Mexico. The logs document geological investigations across multiple drill holes (DHPP1-24-1 through DHPP1-24-5, MWPP1-24-6) and test pits (TPPP1-24-1 through TPPP1-24-5, TPR2-22-13 through TPR2-22-14, HA-PP1-PERC).

The geological investigation focused on characterizing subsurface conditions, with drill holes typically reaching depths of 49-50 feet and identifying two primary geological units: Quaternary Alluvium (Qal) in the upper layers and Cretaceous Lewis Shale (Kl) in the lower layers. Soil classifications varied but predominantly included clayey sand, sandy lean clay, and poorly graded sand with gravel, with detailed particle size, moisture content, and consistency measurements recorded for each sample. The comprehensive logs include information on drilling methods, core recovery, soil stratification, groundwater levels, and laboratory test results, providing a thorough geotechnical assessment of the site for the upcoming pumping plant construction.

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Qal

TPPP1-24-3

TPPP1-24-2

TPPP1-24-1

TPPP1-23-4

TPPP1-23-5

DHPP1-23-1

DHPP1-23-2

DHPP1-23-3

DHPP1-24-4

DHPP1-23-5

MWPP1-24-6

HA-PP1-PERC-24-1

TPR2-22-13

TPR2-22-14

0 60'30'

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER -

Beyer, Christopher R

D. Thornburg

Graham, Kris

Beyer, Christopher R

Gladden, Ryan L P.E.

Deputy Construction Engineer

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

-5

-6

-R D

-1 .D

W G

S T

S A V

D A

-0 9-

S T

S A V

B Y

O R N

B U

R G

N A V A

-G A

U P

W A

R S

R O

C T

S A N

J U

A N

L A

R A L

ÉT

A A K ’Á

Á N

P U

N G

N T

SURFACE GEOLOGY AND

LOCATION OF

EXPLORATION

FARMINGTON, NM

1695-529-60413

2024-09-27

Coordinates based on New Mexico State Plane West Zone, feet. (NAD83).

The Ground to New Mexico State Plane West Zone Grid conversion factor is 0.999713762328.

Contour interval is 2 feet.

GENERAL NOTES

General Map 1695-529-60414.

For Location Map see drawing 1695-529-60415.

For Geologic Sections A-A' & B-B' see drawing 1695-529-60435.

For Geologic Sections C-C' & D-D' see drawing 1695-529-60436.

For General Geologic Legend, Explanation, and Notes see drawing 1695-529-60421.

REFERENCE DRAWINGS

O N

DISTANCE IN FEET

GEOLOGIC SECTION A-A'

0 100 200 300

O N

DISTANCE IN FEET

GEOLOGIC SECTION B-B'

0 100 200

7.0

TD 13.0'

(SP)sc

-3 El

Pr oj

R t.

TD 12.0'

(SP)g

-4 El

Pr oj

2.5

TD 13.5'

-5 El

Pr oj

10.0 9.0

(SP)gc

(SP)g

(SP)gc

4.5

11.0 11.5

TD 12.0'

(SP)g

-4 El

Pr oj

(SP)gc

4.5

11.0 11.5

7.0

TD 13.0'

(SP)sc

-3 El

Pr oj

R t.

D H

-2

7.5

15.0

30.3 30.7

48.6

TD 50.0'

(SP)g

(CL)s

SHALE

D H

-3

.7 6.5

9.0

11.5

TD 50.2'

(SP)g

SHALE

D H

-4

9.0

11.5

TD 49.0'

39.0

s(CL)

(SP)g

CLSTNE

SHALE

D H

-3

6.5

9.0

11.5

TD 50.2'

(SP)g

SHALE

M W

-6

6.6 6.8 7.3 9.2

TD 50.2'

(SC)g

(CL)s s(CL)g

(SP)g

0.0

0.0 0.0 0.0

0.0 0.0

0.0 0.0 0.0 s(CL)

s(CL)

23.8 19.6

24.0

Qal/Qtg

Qal/Qtg Qal/Qtg

19.6 16.5

KlKl Kl Kl

Qal/Qtg

0 60'30'

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER -

Chris Beyer

D. Thornburg

Kris Graham

Beyer, Christopher R

Gladden, Ryan L

Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

-5

-6

-R D

-1 .D

W G

S T

S A V

D A

-0 9-

S T

S A V

B Y

O R N

B U

R G

N A V A

-G A

U P

W A

R S

R O

C T

S A N

J U

A N

L A

R A L

ÉT

A A K ’Á

Á N

P U

N G

N T

GEOLOGIC SECTIONS

A-A' & B-B'

FARMINGTON, NM

1695-529-60435

2024-09-27

GENERAL NOTES

General Map 1695-529-60414.

For Location Map see drawing 1695-529-60415.

For Surface Geology, Location of Explorations and Geologic Sections see drawing 1695-529-60413.

For General Geologic Legend, Explanation, and Notes see

O N

DISTANCE IN FEET

GEOLOGIC SECTION C-C'

0 100 200 300

O N

DISTANCE IN FEET

GEOLOGIC SECTION D-D'

0 100 200 300 400

7.0

TD 13.0'

(SP)sc

-3 El

Pr oj

TD 12.0'

(SP)g

-4

Pr oj

R t.

(SP)gc

4.5

11.0 11.5

2.5

TD 13.5'

-5 El

Pr oj

R t.

10.0

9.0 (SP)g

(SP)gc

2.5

TD 13.5'

-2 El

10.0

9.0 (SP)g

(SP)gc

SM 7.0

TD 13.0'

(SP)sc

-3 El

Pr oj

TD 12.0'

(SP)g

-4 El

(SP)gc

4.5

11.0 11.5

2.5

TD 13.5'

-5 El

Pr oj

10.0

9.0 (SP)g

(SP)gc

D H

-3

6.5

9.0

11.5

TD 50.2'

(SP)g

SHALE

0.0 s(CL)

D H

-1

6.5

9.0

14.0

TD 50.1'

(CL)s

(SP)g

SHALE

0.0 s(CL)

D H

-5

6.9

9.0

TD 50.3'

SHALE

0.0 0.0

0.0 0.00.0 0.0 0.0 0.0

(SP)g

D H

-1

Pr oj

R t.

6.5

9.0

14.0

TD 50.1'

(CL)s

(SP)g

SHALE

0.0 s(CL)

D H

-3

6.5

9.0

11.5

TD 50.2'

(SP)g

SHALE

0.0 s(CL)

D H

-5

Pr oj

6.9

9.0

TD 50.3'

SHALE

0.0

(SP)g

Qal/Qtg

23.5

19.6 20.6

Qal/Qtg Qal/Qtg Qal/Qtg

Kl Kl Kl

23.5

19.6 20.6

Kl Kl

Qal/Qtg

0 60'30'

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER -

Chris Beyer

D. Thornburg

Kris Graham

Beyer, Christopher R

Gladden, Ryan L

Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

-5

-6

-R D

-1 .D

W G

S T

S A V

D A

-0 9-

S T

S A V

B Y

O R N

B U

R G

N A V A

-G A

U P

W A

R S

R O

C T

S A N

J U

A N

L A

R A L

ÉT

A A K ’Á

Á N

P U

N G

N T

GEOLOGIC SECTIONS

C-C' & D-D'

FARMINGTON, NM

1695-529-60436

2024-09-27

GENERAL NOTES

General Map 1695-529-60414.

For Location Map see drawing 1695-529-60415.

For Surface Geology, Location of Explorations and Geologic Sections see drawing 1695-529-60413.

For General Geologic Legend, Explanation, and Notes see

0.0 to 23.5 ft // QUATERNARY ALLUVIUM (Qal)

0.0 to 9.0 ft // SANDY LEAN CLAY: About 70% fines with medium plasticity, medium dry strength, and medium toughness; about 30% fine sand; tan in color, homogeneous, dry; strong reaction with HCl.

LAB TEST DATA: Test interval 4.0 to 5.5 ft;

88.8% fines, 11.2% sand, 0.0% gravel LL= 46.8%, PI= 29.1%, SL= 13.1%, SpG= 2.64, Moisture= 5.5%; lab classification is

LEAN CLAY (CL)

LAB TEST DATA: Test interval 6.5 to 8.0 ft;

85.2% fines, 14.8% sand, 0.0% gravel LL= 39.4%, PI= 24.0%, SL= NA, SpG= 2.63, Moisture= 16.6%; lab classification is

LEAN CLAY (CL)

9.0 to 14.0 ft // LEAN CLAY WITH SAND AND GRAVEL:

about 75% fines with medium to high plasticity, medium dry strength, and medium to high toughness; about 15% fine sand; about 10% fine to medium, hard, subrounded to rounded gravel, max size 30mm; tan to brown in color, moist; strong reaction with HCl; wet at 11.5 ft below ground surface.

LAB TEST DATA: Test interval 9.0 to 10.5 ft;

63.6% fines, 36.4% sand, 0.0% gravel LL= 26.7%, PI= 8.0%, SL= NA, SpG= 2.59, Moisture= 22.5%; lab classification is

SANDY LEAN CLAY

s(CL)

LAB TEST DATA: Test interval 11.5 to 13.0 ft;

60.2% fines, 28.5% sand, 11.3% gravel LL= 24.7%, PI= 6.9%, SL= NA, SpG= 2.64, Moisture= 23.8%; lab classification is

SANDY LEAN CLAY WITH SILT

S(CL-ML)

14.0 to 23.5 ft // POORLY GRADED SAND WITH SILT AND GRAVEL: About 80% fine to coarse, hard, subangular to subrounded sand; about 10% fine to coarse, hard, subrounded, gravel; maximum size 75mm; about 10% nonplastic fines; brown to dark brown in color, wet; no reaction with HCl.

LAB TEST DATA: Test interval 14.0 to 15.5 ft;

3.3% fines, 29.4% sand, 67.3% gravel LL= NA, PI= NP, SL= NA, SpG= 2.76, Moisture= 2.0%; lab classification is

POORLY GRADED GRAVEL WITH SAND

(GP)s

23.5 to 50.1 ft // CRETACEOUS LEWIS SHALE (Kl)

23.5 to 50.1 ft // SHALE: Light to dark gray color with common laminate siltstone and claystone interbeds; shale and siltstone are moderately hard to moderately soft (H4-H5) and moderately weathered to moderately to intensely weathered (W5-W6); claystone is very soft (H7) and intensely weathered (W7); thinly to thickly bedded with dips from 10° to horizontal; easily separates along bedding planes, mechanical breaks and joint sets; core slakes rapidly; no reaction with HCl.

FD5

FD4

FD5

ALL MEASUREMENTS ARE TAKEN

FROM GROUND LEVEL AND

REPORTED IN ENGINEERING FEET

UNLESS OTHERWISE NOTED

DRILLED BY: UCB Provo Drill Crew DRILLER: CJ Weber HELPER(S): Dereck Nate

PURPOSE:

Geotechnical investigations for NGWSP Pumping Plant 1 construction

DRILL EQUIPMENT:

CME 85 Rubber Tire Drilling Rig

DRILL METHOD:

0.0 to 23.5 ft: 4.5" HSA Dry Core (FADC) with intermittent pilot bit

4.0 to 15.5 ft: Standard Penetration Tests (SPT) at 1.5 ft intervals

23.5 to 50.1 ft: HQ3 Outer Core Assembly with 5-foot rods; American Diamond Tool poly-diamond #2 drill bit;

wireline inner core assembly is a 5-foot quad-latch split tube sample barrel.

DRILLING MEDIUM:

0.0 to 23.5: Dry

23.5 to 50.1 ft: Freshwater, no additives

CASING/DRILLING NOTES:

0.0 to 4.0 ft: Pilot Bit

4.0 to 6.5: HSA Dry Core

6.5 to 9.0: HSA Dry Core

9.0 to 11.5: HSA Dry Core

11.5 to 14.0: HSA Dry Core

14.0 to 16.5 ft: HSA Dry Core

16.5 to 19.0 ft: HSA Dry Core

19.0 to 21.5 ft: HSA Dry Core

21.5 to 23.5 ft: Pilot Bit

23.5 to 28.5 ft: HQ3

28.5 to 30.1 ft: HQ3

30.1 to 35.1 ft: HQ3

35.1 to 40.1 ft: HQ3

40.1 to 45.1 ft: HQ3

45.1 to 50.1 ft: HQ3 *All casing removed

HOLE COMPLETION:

Backfill hole with bentonite chips and freshwater

SAMPLING:

SPT#1: 4.0 to 5.5 ft SPT#2: 6.5 to 8.0 ft SPT#3: 9.0 to 10.5 ft SPT#4: 11.5 to 13.0 ft SPT#5: 14.0 to 15.5 ft CORE A: 24.2-25.1 ft CORE B: 30.5-31.2 ft CORE C: 37.3-38.1 ft CORE D: 49.7-50.1 ft

H4-H5

H5 sink sink ref.

Qal

Kl s(CL)

(CL)s

(SP-SM)g

Shale

5059.7

5054.7

5045.2

Bentonite seal with NO pipe

Sandy Lean Clay Lean Clay with Sand

Poorly Graded Sand with Silt and Gravel Shale

SHEET 1 OF 2 DRILL HOLE DHPP1-24-1

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5068.7 ft REVIEWED BY: C. Beyer

BEGUN: 6/7/2024 FINISHED: 6/9/2024

NOTES R

H O

O M

TOTAL DEPTH: 50.1 ft

FEATURE: Pumping Plant 1

G E

U N

D E

P T

S S

A T

CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 6/7/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-1 SHEET 1 OF 2

GRAPHIC LEGEND:HSA= hollow stem auger FADC= flight auger dry core HQ3= coring system SPT= standard penetration test CA= California sample NA= not available ft= feet NE= not encountered N/P= nonplastic NR= no recovery HCl= hydrochloric acid FeOx= iron oxide CaCOx= calcium carbonate MnOx= manganese oxide SpG= specific gravity SL= shrinkage limit O.D.= outside diameter = water level

All angles measured from horizontal axis at zero degrees unless otherwise noted.

The data for the center column and "classification and physical condition" column are based on Bureau of Reclamation Engineering Geology Field Manual and drawings titled Geology for Designs and Specifications as follows "Drawing No. 40-D-6493 Standard Descriptors and Descriptive Criteria for Rock. Drawing No.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

H ar dn es s

G R

A P

F ra ct ur e D en si ty

W ea th er in g

LOCATION: NGWSP PUMPING PLANT 1

E C

O V

E R

DEPTH TO BEDROCK: 23.5 ft

COORDINATES: N 2088987.7 E 2541979.2 GROUND ELEVATION: 5068.7 ft

B lo w s pe r

F oo t (S am pl e In te rv al

DEPTH TO WATER & ELEVATION: 11.5 ft (5057.2)

E L

V A

D O

R O

C K

G W

S P

P P

G S

.G P

J G

S T

D U

S L

A B

.G D

/2 /2

5057.2

BOTTOM OF HOLE

JOINT MEASUREMENTS:

DEPTH INC R T HL TYPE INFILL

27.7' 10° 3 4 5 JT None 29.0' 15° 4 4 5 JT None

STRATIGRAPHY:

0.0 to 23.5 ft // QUATERNARY ALLUVIUM (Qal)

23.5 to 50.1 ft // CRETACEOUS LEWIS SHALE (Kl)

FD5

FD4

Kl Shale

5018.6

Bentonite seal with NO pipe

Sandy Lean Clay Lean Clay with Sand

Poorly Graded Sand with Silt and Gravel Shale

SHEET 2 OF 2 DRILL HOLE DHPP1-24-1

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5068.7 ft REVIEWED BY: C. Beyer

BEGUN: 6/7/2024 FINISHED: 6/9/2024

NOTES R

H O

O M

TOTAL DEPTH: 50.1 ft

FEATURE: Pumping Plant 1

G E

U N

D E

P T

S S

A T

CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 6/7/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-1 SHEET 2 OF 2

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

H ar dn es s

G R

A P

F ra ct ur e D en si ty

W ea th er in g

LOCATION: NGWSP PUMPING PLANT 1

E C

O V

E R

DEPTH TO BEDROCK: 23.5 ft

COORDINATES: N 2088987.7 E 2541979.2 GROUND ELEVATION: 5068.7 ft

B lo w s pe r

F oo t (S am pl e In te rv al

DEPTH TO WATER & ELEVATION: 11.5 ft (5057.2)

E L

V A

D O

R O

G W

S P

P P

G S

.G P

J G

S T

D U

S L

A B

.G D

/2 /2

0.0 to 23.8 ft // QUATERNARY ALLUVIUM (Qal)

0.0 to 7.5 ft // LEAN CLAY WITH SAND AND GRAVEL:

About 80% fines with high dry strength, medium toughness, and no dilatancy; about 10% fine to medium grained, hard, subangular to subrounded sand; about 10% fine to coarse, hard, subrounded to rounded gravel; maximum size 50 mm;

tan to brown in color, homogeneous, dry; strong reaction with HCl.

LAB TEST DATA: Test interval 5.0 to 6.5 ft;

84.1% fines, 14.7% sand, 1.2% gravel LL= 38.9%, PI= 22.3%, SL= 10.2%, SpG= 2.60, Moisture= 6.2%; lab classification is LEAN CLAY WITH SAND (CL)s

7.5 to 23.8 ft // POORLY GRADED SAND WITH SILT AND GRAVEL: About 75% fine to coarse, hard, subangular to subrounded sand; about 15% fine to medium, hard, subrounded gravel; maximum size 30 mm; about 10% nonplastic fines; wet from intermittent water additive for flushing out terrace gravels; brown in color; weak reaction with HCl.

LAB TEST DATA: Test interval 7.5 to 9.0 ft;

9.0% fines, 43.9% sand, 47.1% gravel LL= NA, PI= NP, SL= NA, SpG= 2.60, Moisture= 0.2%; lab classification is

POORLY GRADED SAND WITH SILT AND GRAVEL

(SP-SM)g

LAB TEST DATA: Test interval 13.0 to 14.5 ft;

7.6% fines, 42.0% sand, 50.4% gravel LL= NA, PI= NP, SL= NA, SpG= 2.59, Moisture= 3.5%; lab classification is

POORLY GRADED GRAVEL WITH SILT

(GP-GM)s

LAB TEST DATA: Test interval 23.8 to 24.3 ft;

83.0% fines, 17.0% sand, 0.0% gravel LL= NA, PI= NP, SL= NA, SpG= 2.66, Moisture= 3.6%; lab classification is LEAN CLAY WITH SAND (CL)s

**Material recovered from 15.0 to 23.8 ft is ambiguous due to changeover in rigs, redrill and washout terrace deposits

- top of bedrock is inferred to be at 23.8 ft based on drilling parameters and true recovery at 23.8 ft.

23.8 to 50.0 ft // CRETACEOUS LEWIS SHALE (Kl)

23.8 to 30.3 ft // SHALE: Dark gray in color; highly interbedded with siltstone and claystone; overall material is soft to moderately soft (H6-H5) and slightly to moderately weathered (W4); laminated to thinly bedded with bedding dips horizontal; very easily separates along bedding planes;

common mechanical breaks and bedding plane separations;

joint sets indiscernible; core slakes rapidly; no secondary mineralization observed; no reaction to HCl.

30.3 to 30.7 ft // SANDSTONE: Gray in color, argillaceous, and homogenous; hard (H3) and slightly weathered (W3);

thickly bedded with horizontal strata; no fractures; no secondary mineralization; strong reaction to HCl.

FD3

FD7

FD5

FD3

ALL MEASUREMENTS ARE TAKEN

FROM GROUND LEVEL AND

REPORTED IN ENGINEERING FEET

UNLESS OTHERWISE NOTED

DRILLED BY: UCB Provo Drill Crew DRILLER: CJ Weber HELPER(S): Dereck Nate

PURPOSE:

Geotechnical investigations for NGWSP Pumping Plant 1 construction

DRILL EQUIPMENT:

CME 850 track mounted drilling rig CME 85 rubber tire drilling rig

DRILL METHOD:

0.0 to 24.0 ft: 4.5" HSA Dry Core (FADC) with intermittent pilot bit through terrace deposits

5.0 to 24.3 ft: Intermittent Standard Penetration Tests (SPT)

24.0 to 50.0 ft: HQ3 Outer Core Assembly with 5-foot rods; wireline inner core assembly with 5-foot quad-latch split tube sample barrel;

Syntec Series #6 and #8 drill bits

DRILLING MEDIUM:

0.0 to 24.0 ft: Dry

24.0 to 50.0 ft: Freshwater, no additives

CASING/DRILLING NOTES:

0.0 to 5.0 ft: Pilot Bit

5.0 to 7.5 ft: HSA Dry Core

7.5 to 10.0 ft: HSA Dry Core

10.0 to 12.5 ft: HSA Dry Core

12.5 to 17.5 ft: HQ3

17.5 to 22.5 ft: HQ3 *could not advance with CME 850 due to mechanical issues; MOB out CME 85 from UC region;

15.0 to 23.8 ft: Redrill w/ Pilot Bit;

*TOB 23.8 ft

23.8 to 25.0 ft: HQ3

25.0 to 40.0 ft: HQ3

40.0 to 45.0 ft: HQ3

45.0 to 50.0 ft: HQ3 *All casing removed

HOLE COMPLETION:

Backfill hole with bentonite chips and freshwater

SAMPLING:

CORE A: 26.1 to 26.7 ft CORE B: 34.2 to 35.0 ft CORE C: 40.4 to 41.1 ft CORE D: 48.9 to 49.4 ft SPT #1: 5.0 to 6.5 ft SPT #2: 7.5 to 9.0 ft SPT #3: 10.0 to 11.5 ft (NR) SPT #4: 12.5 to 14.0 ft (NR) SPT #5: 13.0 to 14.5 ft SPT #6: 23.8 to 24.3 ft (NR)

Qal

(CL)s

(SP-SM)g

Shale

5060.1

5043.8

Bentonite seal with NO pipe

Lean Clay with Sand Poorly Graded Sand with Silt and Gravel

Siltstone

SHEET 1 OF 2 DRILL HOLE DHPP1-24-2

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5067.6 ft REVIEWED BY: C. Beyer

BEGUN: 4/10/2024 FINISHED: 4/17/2024

NOTES R

H O

O M

TOTAL DEPTH: 50.0 ft

FEATURE: Pumping Plant 1

G E

U N

D E

P T

S S

A T

CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 4/11/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-2 SHEET 1 OF 2

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

H ar dn es s

G R

A P

F ra ct ur e D en si ty

W ea th er in g

LOCATION: NGWSP PUMPING PLANT 1

E C

O V

E R

DEPTH TO BEDROCK: 23.8 ft

COORDINATES: N 2089060.9 E 2541990.1 GROUND ELEVATION: 5067.6 ft

B lo w s pe r

F oo t (S am pl e In te rv al

DEPTH TO WATER & ELEVATION: 11.5 ft (5056.1)

E L

V A

D O

R O

G W

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P P

G S

.G P

J G

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A B

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/2 /2

5056.1

30.7 to 48.6 ft // SHALE: Dark gray to black in color with intermittent siltstone and claystone interbeds; moderately hard (H4) to moderately soft (H6) and moderately to intensely weathered (W6); laminated to thinly bedded with horizontal strata; common mechanical and bedding plane fractures; no secondary mineralization; strong reaction to HCl.

48.6 to 50.0 ft // SANDSTONE: Light gray in color, argillaceous, and homogenous; hard (H3) and slightly weathered (W3); thickly bedded with horizontal strata; very slightly fractured (FD1); strong reaction to HCl.

STRATIGRAPHY:

0.0 to 23.8 ft QUATERNARY ALLUVIUM (Qal)

23.8 to 50.0 ft CRETACEOUS LEWIS SHALE (Kl)

FD3

FD5

FD1

H4-H6

Kl Shale

5017.6

Bentonite seal with NO pipe

Lean Clay with Sand Poorly Graded Sand with Silt and Gravel

Siltstone

SHEET 2 OF 2 DRILL HOLE DHPP1-24-2

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5067.6 ft REVIEWED BY: C. Beyer

BEGUN: 4/10/2024 FINISHED: 4/17/2024

NOTES R

H O

O M

TOTAL DEPTH: 50.0 ft

FEATURE: Pumping Plant 1

G E

U N

D E

P T

S S

A T

CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 4/11/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-2 SHEET 2 OF 2

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

H ar dn es s

G R

A P

F ra ct ur e D en si ty

W ea th er in g

LOCATION: NGWSP PUMPING PLANT 1

E C

O V

E R

DEPTH TO BEDROCK: 23.8 ft

COORDINATES: N 2089060.9 E 2541990.1 GROUND ELEVATION: 5067.6 ft

B lo w s pe r

F oo t (S am pl e In te rv al

DEPTH TO WATER & ELEVATION: 11.5 ft (5056.1)

E L

V A

D O

R O

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P P

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/2 /2

G10

0.0 to 19.6 ft // QUATERNARY ALLUVIUM (Qal)

0.0 to 6.5 ft // CLAYEY SAND: About 70% fine sand; about 30% fines with medium plasticity, medium dry strength, and medium toughness; trace medium to coarse, hard, subangular to subrounded sand; trace fine to coarse, hard, subrounded to rounded gravel; maximum size, 120mm;

brown in color, homogeneous, dry; strong reaction with HCl.

LAB TEST DATA: Test interval 4.0 to 5.5 ft;

61.5% fines, 38.5% sand, 0.0% gravel LL= 30.4%, PI= 11.6%, SL= NA, SpG= 2.63, Moisture= 3.8%; lab classification is SANDY LEAN CLAY s(CL)

6.5 to 9.0 ft // SANDY LEAN CLAY: About 45% fine sand;

about 55% fines with medium plasticity, medium dry strength and medium toughness; trace fine to coarse, hard, subrounded to rounded gravel; trace hard, subrounded cobbles; maximum size, 120mm; tan, homogenous, dry;

strong reaction with HCl.

LAB TEST DATA: Test interval 6.5 to 8.0 ft;

62.3% fines, 34.0% sand, 3.7% gravel LL= 26.0%, PI= 11.6%, SL= NA, SpG= 2.44, Moisture= 6.0%; lab classification is SANDY LEAN CLAY s(CL)

9.0 to 11.5 ft // NO RECOVERY

11.5 to 19.6 ft // POORLY GRADED SAND WITH GRAVEL: About 80% fine to medium, hard, subangular to subrounded sand; about 15% fine to coarse, hard, subrounded, gravel; about 5% nonplastic fines; trace cobbles; maximum size, 250mm; wet at 12.3 ft; brown to dark brown in color; no reaction with HCl.

LAB TEST DATA: Test interval 11.5 to 13.0 ft;

8.1% fines, 54.3% sand, 37.6% gravel LL= NA%, PI= NA%, SL= NA, SpG= 2.62, Moisture= 4.7%; lab classification is

POORLY GRADED SAND WITH SILT AND GRAVEL

(SP-SM)g

LAB TEST DATA: Test interval 18.5 to 20.0 ft;

26.7% fines, 44.3% sand, 29.0% gravel LL= NA%, PI= NP, SL= NA, SpG= 2.61, Moisture= 1.1%; lab classification is SILTY SAND WITH GRAVEL (SM)g

19.6 to 50.2 ft // CRETACEOUS LEWIS SHALE (Kl)

19.6 to 29.0 // SHALE: Recovered as augured material;

dark gray to black with intermittent claystone interbeds; very soft (H7) and intensely weathered (W7); bedding thickness and fracture orientation are unidentifiable due to pulverized material; trace gravel from up hole cavings; strong reaction with HCl.

29.0 to 35.2 ft // SHALE: Light to dark gray color with common siltstone and claystone interbeds; shale and siltstone are moderately soft (H5) and moderately weathered (W5); claystone is very soft (H7) and intensely weathered (W7); laminated to thinly bedded with dips from 15° to horizontal; easily separates along bedding planes; trace visible mechanical breaks and bedding plane separations;

core slakes rapidly; strong reaction to HCl.

FD5

ALL MEASUREMENTS ARE TAKEN

FROM GROUND LEVEL AND

REPORTED IN ENGINEERING FEET

UNLESS OTHERWISE NOTED

DRILLED BY: UCB Provo Drill Crew DRILLER: CJ Weber HELPER(S): Dereck Nate

PURPOSE:

Geotechnical investigations for NGWSP Pumping Plant 1 construction

DRILL EQUIPMENT:

CME 85 Rubber Tire Drilling Rig

DRILL METHOD:

0.0 to 26.5 ft: 4.5" HSA Dry Core (FADC) with intermittent pilot bit

4.0 to 20.0 ft: Standard Penetration Tests (SPT) at 2.5 ft intervals

29.0 to 50.2 ft: HQ3 Outer Core Assembly with 5-foot rods; American Diamond Tool poly-diamond #2 drill bit;

wireline inner core assembly is a 5-foot quad-latch split tube sample barrel.

DRILLING MEDIUM:

0.0 to 29.0: Dry w/ intermittent freshwater to build natural mud weight

29.0 to 50.2 ft: Freshwater, no additives

CASING/DRILLING NOTES:

0.0 to 4.0 ft: Pilot Bit

4.0 to 6.5: HSA Dry Core

6.5 to 9.0: HSA Dry Core

9.0 to 11.5: HSA Dry Core

11.5 to 13.2: HSA Dry Core

13.2 to 18.5 ft: Pilot Bit

18.5 to 24.9 ft: HQ3

24.0 to 26.5 ft: HAS Overcore

26.5 to 29.0 ft: HQ3

29.0 to 30.2 ft: HQ3

30.2 to 35.2 ft: HQ3

35.2 to 40.2 ft: HQ3

40.2 to 45.2 ft: HQ3

45.2 to 50.2 ft: HQ3 *All casing removed

HOLE COMPLETION:

Backfill hole with bentonite chips and freshwater

SAMPLING:

CORE A: 29.2 to 30.1 ft CORE B: 34.2 to 35.2 ft CORE C: 36.0 to 37.1 ft CORE D: 48.3 to 49.1 ft

SPT#1: 4.0 to 5.5 ft SPT#2: 6.5 to 8.0 ft SPT#3: 9.0 to 10.5 ft SPT#4: 11.5 to 13.0 ft SPT#5: 13.3 to 14.8 ft SPT#6: 18.5 to 20.0 ft SPT#7: 24.0 to 25.5 ft

50/ref.

Qal

Kls s(CL)

(SP)g

Shale

5059.7

5057.2

5049.1

Bentonite seal with NO pipe

Sandy Lean Clay No recovery

Poorly Graded Sand with Gravel Shale

SHEET 1 OF 2 DRILL HOLE DHPP1-24-3

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5068.7 ft REVIEWED BY: C. Beyer

BEGUN: 5/22/2024 FINISHED: 5/24/2024

NOTES R

H O

O M

TOTAL DEPTH: 50.2 ft

FEATURE: Pumping Plant 1

G E

U N

D E

P T

S S

A T

CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 5/25/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-3 SHEET 1 OF 2

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

H ar dn es s

G R

A P

F ra ct ur e D en si ty

W ea th er in g

LOCATION: NGWSP PUMPING PLANT 1

E C

O V

E R

DEPTH TO BEDROCK: 19.6 ft

COORDINATES: N 2089037.8 E 2541870.1 GROUND ELEVATION: 5068.7 ft

B lo w s pe r

F oo t (S am pl e In te rv al

DEPTH TO WATER & ELEVATION: 12.4 ft (5056.3)

E L

V A

D O

R O

G W

S P

P P

G S

.G P

J G

S T

D U

S L

A B

.G D

/2 /2

5056.3

G11

35.2 to 50.2 ft // SHALE: Light to dark gray color with intermittent siltstone and claystone interbeds; shale and siltstone are moderately soft (H5) and moderately weathered (W5); claystone is very soft (H7) and intensely weathered (W7); laminated to thinly bedded with horizontal strata;

easily separates along bedding planes; common mechanical breaks, bedding plane separations, and joint sets; core slakes rapidly; strong reaction to HCl.

DEPTH INCL R T HL TYPE INFILL

37.0' 10° 3 3 6 IF NONE

38.0' 10° 3 0 6 RF NONE

41.0' 10° 3 3 6 BJ NONE

43.5' 10° 3 3 6 BJ NONE

44.2' 10° 3 3 6 BJ NONE

STRATIGRAPHY:

0.0 to 19.6 ft QUATERNARY ALLUVIUM (Qal)

19.6 to 50.2 ft CRETACEOUS LEWIS SHALE (Kl)

FD5

FD6

FD5

Kls Shale

5018.5

Bentonite seal with NO pipe

Sandy Lean Clay No recovery

Poorly Graded Sand with Gravel Shale

SHEET 2 OF 2 DRILL HOLE DHPP1-24-3

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5068.7 ft REVIEWED BY: C. Beyer

BEGUN: 5/22/2024 FINISHED: 5/24/2024

NOTES R

H O

O M

TOTAL DEPTH: 50.2 ft

FEATURE: Pumping Plant 1

G E

U N

D E

P T

S S

A T

CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 5/25/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-3 SHEET 2 OF 2

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

H ar dn es s

G R

A P

F ra ct ur e D en si ty

W ea th er in g

LOCATION: NGWSP PUMPING PLANT 1

E C

O V

E R

DEPTH TO BEDROCK: 19.6 ft

COORDINATES: N 2089037.8 E 2541870.1 GROUND ELEVATION: 5068.7 ft

B lo w s pe r

F oo t (S am pl e In te rv al

DEPTH TO WATER & ELEVATION: 12.4 ft (5056.3)

E L

V A

D O

R O

G W

S P

P P

G S

.G P

J G

S T

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S L

A B

.G D

/2 /2

G12

0.0 to 24.0 ft // QUATERNARY ALLUVIUM (Qal)

0.0 to 9.0 ft // CLAYEY SAND: About 65% fine sand; about 35% fines with medium plasticity, medium dry strength, and medium toughness; trace fine to coarse, hard, subrounded to rounded gravel; maximum size 50mm; tan in color, homogeneous, dry; strong reaction with HCl.

LAB TEST DATA: Test interval 4.0 to 5.5 ft;

42.0% fines, 54.9% sand, 3.1% gravel LL= 27.6%, PI= 8.0%, SL= 19.4%, SpG= 2.28, Moisture= 3.1%; lab classification is

CLAYEY SAND (SC)

LAB TEST DATA: Test interval 6.5 to 8.0 ft;

47.6% fines, 52.4% sand, 0.0% gravel LL= NA, PI= NP, SL= NA, SpG= 2.59, Moisture= 4.7%; lab classification is

SILTY SAND (SM)

9.0 to 11.5 ft // SANDY LEAN CLAY: About 60% fines with medium plasticity, medium dry strength, medium toughness, and slow dilatancy; About 40% fine sand; brown, homogenous, and moist; strong reaction with HCl.

LAB TEST DATA: Test interval 9.0 to 10.5 ft;

58.4% fines, 41.6% sand, 0.0% gravel LL= 25.3%, PI= 9.4%, SL= NA%, SpG= 2.62, Moisture= 3.6%; lab classification is SANDY LEAN CLAY s(SL)

11.5 to 24.0 ft // POORLY GRADED SAND WITH GRAVEL: About 75% fine to coarse, hard, subangular to subrounded sand; about 15% fine to coarse, hard, subrounded gravel; maximum size 70mm; about 10% nonplastic fines; wet at about 14.0 ft; brown to dark brown in color; no reaction with HCl.

24.0 to 49.0 ft // CRETACEOUS LEWIS SHALE (Kl)

24.0 to 39.0 ft // CLAYSTONE: Dark gray to black with intermittent gray to black shale interbeds; soft to very soft (H6-H7) with moderately hard to moderately soft lenses (H4-H5) and moderately weathered to decomposed (W7-W9); laminated to thinly bedded with dips from 20° to horizontal where discernable; easily separates along bedding planes; trace visible mechanical breaks and bedding plane separations; core slakes rapidly; strong reaction to HCl.

39.0 to 49.0 ft // SHALE: Light to dark gray color with intermittent siltstone and claystone interbeds; shale and siltstone are moderately hard to moderately soft (H4-H5) and moderately weathered (W5); claystone is very soft (H7) and intensely weathered (W7); laminated to thinly bedded with dips from 10° to horizontal; easily separates along bedding planes; common mechanical breaks, bedding plane separations, and joint sets; core slakes rapidly; strong reaction to HCl.

STRATIGRAPHY:

0.0 to 24.0 ft: QUATERNARY ALLUVIUM (Qal)

24.0 to 49.0 ft: CRETACEOUS LEWIS SHALE (Kl)

FD7

FD6

FD5

FD6

FD7

W5-W6

W4-W6

ALL MEASUREMENTS ARE TAKEN

FROM GROUND LEVEL AND

REPORTED IN ENGINEERING FEET

UNLESS OTHERWISE NOTED

DRILLED BY: UCB Provo Drill Crew DRILLER: CJ Weber HELPER(S): Dereck Nate

PURPOSE:

Geotechnical investigations for NGWSP Pumping Plant 1 construction

DRILL EQUIPMENT:

CME 85 Rubber Tire Drilling Rig

DRILL METHOD:

0.0 to 24.0 ft: 4.5" HSA Dry Core (FADC) with intermittent pilot bit

4.0 to 13.0 ft: Standard Penetration Tests (SPT) at 2.5 ft intervals

24.0 to 49.0 ft: HQ3 Outer Core Assembly with 5-foot rods; American Diamond Tool poly-diamond #2 drill bit;

wireline inner core assembly is a 5-foot quad-latch split tube sample barrel.

DRILLING MEDIUM:

0.0 to 24.0: Dry

29.0 to 50.2 ft: Freshwater, no additives

CASING/DRILLING NOTES:

0.0 to 4.0 ft: Pilot Bit

4.0 to 6.5 ft: HSA Dry Core

6.5 to 9.0 ft: HSA Dry Core

9.0 to 11.5 ft: HSA Dry Core

11.5 to 14.0 ft: HSA Dry Core

14.0 to 19.0 ft: HSA Dry Core

19.0 to 21.5 ft: HSA Dry Core

21.5 to 24.0 ft: HSA Dry Core

24.0 to 29.0 ft: HQ3

29.0 to 34.0 ft: HQ3

34.0 to 39.0 ft: HQ3

39.0 to 44.0 ft: HQ3

44.0 to 49.0 ft: HQ3 *All casing removed

HOLE COMPLETION:

Backfill hole with bentonite chips and freshwater

SAMPLING:

CORE A: 28.5 to 29.0 ft CORE B: 29.6 to 30.3 ft CORE C: 40.2 to 40.8 ft CORE D: 44.8 to 45.3 ft

SPT #1: 4.0 to 5.5 ft SPT #2: 6.5 to 8.0 ft SPT #3: 9.0 to 10.5 ft SPT #4: 11.5 to 13.0 ft

H5-H6

H4-H5

Qal

s(CL)

(SP-SM)g

Shale

5060.6

5058.1

5045.6

5020.6

Bentonite seal with 1 pipe

Clayey Sand Sandy Lean Clay

Poorly Graded Sand with Silt and Gravel Shale

SHEET 1 OF 1 DRILL HOLE DHPP1-24-4

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5069.6 ft REVIEWED BY: C. Beyer

BEGUN: 6/5/2024 FINISHED: 6/7/2024

NOTES R

H O

O M

TOTAL DEPTH: 49.0 ft

FEATURE: Pumping Plant 1

G E

U N

D E

P T

S S

A T

CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 6/6/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-4 SHEET 1 OF 1

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

H ar dn es s

G R

A P

F ra ct ur e D en si ty

W ea th er in g

LOCATION: NGWSP PUMPING PLANT 1

E C

O V

E R

DEPTH TO BEDROCK: 24.0 ft

COORDINATES: N 2089014.9 E 2541761.6 GROUND ELEVATION: 5069.6 ft

B lo w s pe r

F oo t (S am pl e In te rv al

DEPTH TO WATER & ELEVATION: 19.2 ft (5050.4)

E L

V A

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/2 /2

5050.4

G13

0.0 to 23.5 ft // QUATERNARY ALLUVIUM (Qal)

4.0 to 9.0 ft // SANDY LEAN CLAY: About 70% fines with medium plasticity, medium dry strength, and medium toughness; about 30% fine sand; tan in color, homogeneous, dry; strong reaction with HCl.

LAB TEST DATA: Test interval 4.0 to 5.5 ft;

88.8% fines, 11.2% sand, 0.0% gravel LL= 46.8%, PI= 29.1%, SL= 13.1%, SpG= 2.64, Moisture= 5.5%; lab classification is

LEAN CLAY (CL)

LAB TEST DATA: Test interval 6.5 to 8.0 ft;

85.2% fines, 14.8% sand, 0.0% gravel LL= 39.4%, PI= 24.0%, SL= NA, SpG= 2.63, Moisture= 16.6%; lab classification is

LEAN CLAY (CL)

9.0 to 14.0 ft // LEAN CLAY WITH SAND AND GRAVEL:

LAB TEST DATA: Test interval 9.0 to 10.5 ft;

63.6% fines, 36.4% sand, 0.0% gravel LL= 26.7%, PI= 8.0%, SL= NA, SpG= 2.59, Moisture= 22.5%; lab classification is

SANDY LEAN CLAY

s(CL)

LAB TEST DATA: Test interval 11.5 to 13.0 ft;

60.2% fines, 28.5% sand, 11.3% gravel LL= 24.7%, PI= 6.9%, SL= NA, SpG= 2.64, Moisture= 23.8%; lab classification is

SANDY LEAN CLAY WITH SILT

S(CL-ML)

LAB TEST DATA: Test interval 14.0 to 15.5 ft;

3.3% fines, 29.4% sand, 67.3% gravel LL= NA, PI= NP, SL= NA, SpG= 2.76, Moisture= 2.0%; lab classification is

POORLY GRADED GRAVEL WITH SAND

(GP)s

23.5 to 50.1 ft // CRETACEOUS LEWIS SHALE (Kl)

FD5

FD4

ALL MEASUREMENTS ARE TAKEN

FROM GROUND LEVEL AND

REPORTED IN ENGINEERING FEET

UNLESS OTHERWISE NOTED

DRILLED BY: UCB Provo Drill Crew DRILLER: CJ Weber HELPER(S): Dereck Nate

PURPOSE:

Geotechnical investigations for NGWSP Pumping Plant 1 construction

DRILL EQUIPMENT:

CME 85 Rubber Tire Drilling Rig

DRILL METHOD:

0.0 to 25.7 ft: 4.5" HSA Dry Core (FADC) with intermittent pilot bit

4.0 to 10.5 ft: Standard Penetration Tests (SPT) at 2.5 ft intervals

25.7 to 50.3 ft: HQ3 Outer Core Assembly with 5-foot rods; American Diamond Tool poly-diamond #2 drill bit;

wireline inner core assembly is a 5-foot quad-latch split tube sample barrel.

DRILLING MEDIUM:

0.0 to 25.7: Dry

29.0 to 50.2 ft: Freshwater, no additives

CASING/DRILLING NOTES:

0.0 to 4.0 ft: Pilot Bit

4.0 to 6.5 ft: HSA Dry Core

6.5 to 9.0 ft: HSA Dry Core

9.0 to 11.5 ft: HSA Dry Core

11.5 to 11.7 ft: HSA Dry Core

11.7 to 14.0 ft: Pilot Bit

14.0 to 16.0 ft: HSA Dry Core

16.0 to 19.0 ft: HSA Dry Core

19.0 to 20.6 ft: HSA Dry Core

20.6 to 23.6 ft: HSA Dry Core

23.6 to 24.0 ft: Pilot Bit

24.0 to 25.7 ft: HSA Dry Core

25.7 to 30.3 ft: HQ3

30.3 to 35.3 ft: HQ3

35.3 to 40.3 ft: HQ3

40.3 to 45.3 ft: HQ3

45.3 to 50.3 ft: HQ3 *All casing removed

HOLE COMPLETION:

Backfill hole with bentonite chips and freshwater

SAMPLING:

CORE A: 26.5 - 27.3 ft CORE B: 37.4 - 38.1 ft CORE C: 42.6 - 43.0 ft CORE D: 49.0 - 49.7 ft

SPT#1: 4.0 to 5.5 ft SPT#2: 6.5 to 8.0 ft SPT#3: 9.0 to 10.5 ft

Qal

Kls s(CL)

(SP)g

Shale

5061.6

5059.5

5047.9

Bentonite Seal: 1 pipe group, 1 pipe

Sandy Lean Clay Clayey Sand

Poorly Graded Sand with Gravel Shale

SHEET 1 OF 2 DRILL HOLE DHPP1-24-5

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5068.5 ft REVIEWED BY: C. Beyer

BEGUN: 5/25/2024 FINISHED: 5/27/2024

NOTES R

H O

O M

TOTAL DEPTH: 50.3 ft

FEATURE: Pumping Plant 1

G E

U N

D E

P T

S S

A T

CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 5/26/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-5 SHEET 1 OF 2

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

H ar dn es s

G R

A P

F ra ct ur e D en si ty

W ea th er in g

LOCATION: NGWSP PUMPING PLANT 1

E C

O V

E R

DEPTH TO BEDROCK: 20.6 ft

COORDINATES: N 2089085.8 E 2541766.5 GROUND ELEVATION: 5068.5 ft

B lo w s pe r

F oo t (S am pl e In te rv al

DEPTH TO WATER & ELEVATION: 13.4 ft (5055.1)

E L

V A

D O

R O

G W

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P P

G S

.G P

J G

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A B

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/2 /2

5055.1

G14

JOINT MEASUREMENTS:

DEPTH INC R T HL TYPE INFILL

27.7' 10° 3 4 5 JT None 29.0' 15° 4 4 5 JT None

STRATIGRAPHY:

0.0 to 23.5 ft // QUATERNARY ALLUVIUM (Qal)

23.5 to 50.1 ft // CRETACEOUS LEWIS SHALE (Kl)

FD4

FD5

FD4

FD5

H4-H5

Kls Shale

5018.2

Bentonite Seal: 1 pipe group, 1 pipe

Sandy Lean Clay Clayey Sand

Poorly Graded Sand with Gravel Shale

SHEET 2 OF 2 DRILL HOLE DHPP1-24-5

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5068.5 ft REVIEWED BY: C. Beyer

BEGUN: 5/25/2024 FINISHED: 5/27/2024

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TOTAL DEPTH: 50.3 ft

FEATURE: Pumping Plant 1

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CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 5/26/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. DHPP1-24-5 SHEET 2 OF 2

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

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LOCATION: NGWSP PUMPING PLANT 1

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DEPTH TO BEDROCK: 20.6 ft

COORDINATES: N 2089085.8 E 2541766.5 GROUND ELEVATION: 5068.5 ft

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DEPTH TO WATER & ELEVATION: 13.4 ft (5055.1)

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G15

0.0 to 16.5 ft // QUATERNARY ALLUVIUM (Qal)

0.0 to 6.6 ft // CLAYEY SAND WITH GRAVEL: About 60% fine sand; about 25% fines with low dry strength, low toughness, and rapid dilatancy; about 15% fine to medium, hard, subangular gravel; maximum size 60mm; tan in color, dry; strong reaction with HCl.

LAB TEST DATA: Test interval 4.0 to 5.5 ft;

54.1% fines, 45.9% sand, 0.0% gravel LL= 26.0%, PI= 8.3%, SL= NA, SpG= 2.53, Moisture= 3.2%; lab classification is SANDY LEAN CLAY s(CL)

6.6 to 6.8 ft // LEAN CLAY WITH SAND: About 80% fines with medium plasticity, medium dry strength, and medium toughness; about 20% fine sand; dark brown in color; moist;

and no reaction with HCl.

LAB TEST DATA: Test interval 6.0 to 8.0 ft;

12.2% fines, 32.3% sand, 55.5% gravel LL= NA, PI= NP, SL= NA, SpG= 2.60, Moisture= 0.8%; lab classification is SILTY GRAVEL WITH SAND (GM)s

6.8 to 7.3 ft // NO RECOVERY

7.3 to 9.2 ft // SANDY LEAN CLAY WITH GRAVEL: About 60% fines with medium plasticity, medium dry strength, and medium toughness; about 20% fine to medium, hard, subangular to subrounded sand; about 20% fine to coarse, hard, angular to subrounded gravel; maximum size 75mm.

9.2 to 16.5 ft // POORLY GRADED SAND WITH SILT AND GRAVEL: About 80% medium to coarse, hard, subangular to subrounded sand; about 10% fine to medium, hard, subrounded gravel; maximum size 30 mm; about 10% nonplastic fines; brown in color; moist, wet at 11.5 ft; no reaction with HCl.

LAB TEST DATA: Test interval 9.0 to 10.5 ft;

5.0% fines, 57.7% sand, 37.3% gravel LL= NA, PI= NP, SL= NA, SpG= 2.60, Moisture= 0.3%; lab classification is

POORLY GRADED SAND WITH SILT AND GRAVEL

(SP-SM)g

16.5 to 22.5 ft // CRETACEOUS LEWIS SHALE (Kl)

16.5 to 22.5 ft // SANDSTONE: Presumed to be a hard capstone to the Lewis Shale; light gray in color, argillaceous, and homogenous; hard (H3) and slightly weathered (W3);

thickly bedded with horizontal bedding planes; very slightly fractured (FD1); no secondary mineralization; strong reaction to HCl.

STRATIGRAPHY:

0.0 to 16.5 ft QUATERNARY ALLUVIUM (Qal)

16.5 to 22.5 ft CRETACEOUS LEWIS SHALE (Kl)

FD1

ALL MEASUREMENTS ARE TAKEN

FROM GROUND LEVEL AND

REPORTED IN ENGINEERING FEET

UNLESS OTHERWISE NOTED

DRILLED BY: UCB Provo Drill Crew DRILLER: CJ Weber HELPER(S): Dereck Nate

PURPOSE:

Geotechnical investigations for NGWSP Pumping Plant 1 construction

DRILL EQUIPMENT:

CME 85 rubber tire drilling rig

DRILL METHOD:

0.0 to 19.0 ft: 4.5" HSA Dry Core (FADC) with intermittent pilot bit through terrace deposits

4.0 to 10.5 ft: Intermittent Standard Penetration Tests (SPT)

16.5 to 22.5 ft: HQ3 Outer Core Assembly with 5-foot rods; wireline inner core assembly with 5-foot quad-latch split tube sample barrel;

Syntec Series #6 drill bit

DRILLING MEDIUM:

0.0 to 16.5: Dry w/ intermittent freshwater to build natural mud weight;

16..5 to 22.5 ft: Freshwater, no additives

CASING/DRILLING NOTES:

0.0 to 4.0 ft: Pilot Bit

4.0 to 6.5 ft: HSA Dry Core

6.5 to 6.8 ft: HSA Dry Core *hit refusal at 6.8 ft

6.8 to 7.3 ft: Pilot Bit

7.3 to 9.0 ft: HAS Dry Core

9.0 to 11.5 ft: HSA Dry Core

11.5 to 14.0 ft: HSA Dry Core

9.0 to 11.5 ft: HSA Dry Core

14.0 to 16.5 ft: HSA Dry Core *hit refusal at 16.5 ft

16.5 to 19.0 ft: Pilot Bit *could not advance augers or pilot bit, x/o to HQ3; driller sounded hole at 16.5 ft due to cavings prior to HQ drilling

16.5 to 20.5 ft: HQ3

20.5 to 22.5 ft: HQ3

HOLE COMPLETION:

Installed 0.010 slotted screen from 15'-5' with 1' sump. Used 20/40 sand for pre-pack, 10-20 sand from 16.5'-3'.

Bentonite chips from 3'-0.5'. Installed monument, concrete from 0.5'-surface.

7 bags of 10/20 sand, ½ bag of 20/40, 2 bags of bentonite chips, 1 bag of concrete mix.

SAMPLING:

SPT #1: 4.0 to 5.5 ft SPT #2: 6.5 to 8.0 ft (refusal at 6.8 ft) SPT #3: 6.8 to 8.3 ft (refusal at 7.1 ft) SPT #4: 9.0 to 10.5 ft

Qal

(SC)g

(CL)s

RECOVERY

s(CL)g

(SP-SM)g

5059.9 5059.7 5059.2

5057.3

5050.0

5044.0

Cement: 1 pipe Bentonite seal with 1 pipe

Filter Pack: 1 pipe group, 1 pipe

Field Filter Pack: 1 pipe group, 1 pipe

Slough at bottom of hole

Clayey Sand with Gravel Lean Clay with Sand

No recovery Sandy Clay with Gravel

Poorly Graded Sand with Silt and Gravel Sandstone

SHEET 1 OF 1 DRILL HOLE MWPP1-24-6

HOLE LOGGED BY: K. Graham

TOP OF CASING ELEVATION: 5066.5 ft REVIEWED BY: C. Beyer

BEGUN: 6/9/2024 FINISHED: 6/11/2024

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TOTAL DEPTH: 22.5 ft

FEATURE: Pumping Plant 1

G E

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CLASSIFICATION AND

PHYSICAL CONDITION

WATER DEPTH MEASURED ON: 6/11/2024

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90o

STATE: New Mexico

ENGINEERING PROPERTIES

COMMENTS:

GEOLOGIC LOG OF DRILL HOLE NO. MWPP1-24-6 SHEET 1 OF 1

All angles measured from horizontal axis at zero degrees unless otherwise noted.

40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

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LOCATION: NGWSP PUMPING PLANT 1

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DEPTH TO BEDROCK: 16.5 ft

COORDINATES: N 2089129.9 E 2541882.9 GROUND ELEVATION: 5066.5 ft

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DEPTH TO WATER & ELEVATION: 11.0 ft (5055.5)

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5055.5

G16

0.0 to 1.5 ft SANDY LEAN CLAY: About 60% fines with medium plasticity, hight dry strength, and medium toughness; bout 40% fine sand; maximum size, fine sand;

strong reaction with HCl.

IN-PLACE CONDITION: Grayish brown in color, homogeneous, dry, very difficult to auger by hand.

1.5 to 2.3 ft CLAYEY SAND: About 80% fine sand; about 20% fines with medium plasticity, medium dry strength, and medium toughness, trace fine gravel;

maximum size, 25 mm; strong reaction with HCl.

IN-PLACE CONDITION: Grayish brown in color, homogeneous, dry.

2.3 to 3.4 ft SILTY SAND: About 85% fine sand; about 15% fines with no plasticity, no dry strength and rapid dilatancy; trace fine to coarse hard, subounded gravel;

maximum size, 25 mm; strong reaction with HCl.

Percolation test Conducted conducted from 0.0 to 3.4 feet. 2 gallons of water rapidly added to auger hole.

Time: Water level in feet from surface:

0:30 1.6ft 1:00 1.8ft 2:00 2.3ft 2:30 2.3ft 3:00 2.5ft 3:30 2.6ft 4:00 2.8ft 4:30 2.9ft 5:00 2.9 ft 6:00 3.0 ft 7:00 3.1 ft 8:00 No water detected bottom of hole filled in with slough to 3.1 ft.

s(CL)

1.5 ft (5067.3)

2.3 ft (5066.5)

3.4 ft (5065.4)

Surface vegetated with Russian Thistle. Discontinued auger hole due to refusal in gravel.

5 -in

PLUS

7-1336-A (1-86) Bureau of Reclamation

CLASSIFICATION AND DESCRIPTION OF MATERIAL

(SEE USBR 5000, 5005)D

P T

% PLUS 3 in

(BY VOLUME)

SHEET 1 OF 1

COMMENTS:

LOG OF TEST PIT NO. HA-PP1-24-PERC

CLASSIFICATION

GROUP

SYMBOL

3 -in

PROJECT: Navajo Gallup Water Supply Project

GROUND ELEVATION: 5068.8

METHOD OF EXPLORATION: Hand Auger

LOGGED BY: C. Beyer

DATE EXCAVATED: 6/13/2024

FEATURE: Pumping Plant 1, San Juan Lateral, PNM Option

LOCATION: Pumping Plant 1. Detention Pond

COORDINATES: N 2,089,155.8 E 2,541,593.5

APPROXIMATE DIMENSIONS: 0.26'X3.4'

DEPTH TO WATER: NE DATE: 6/13/2024

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G17

0.0 to 5.0 ft CLAYEY SAND: About 65% fine sand; about 35% fines with medium plasticity, medium dry strength, and medium toughness; trace medium to coarse sand, trace fine to coarse gravel; maximum size, 120mm; strong reaction with HCl.

IN-PLACE CONDITION: Grayish brown in color, homogeneous, dry.

IN-PLACE UNIT WEIGHT AND MOISTURE FROM 4.3 ft.

Total: 75.9 lb/ft³, 14.0% (66.3% compaction) LAB TEST DATA: 52.6 % sand, 47.2% fines, 0% gravel, LL= NA PI = NP

SPG=2.68

Maximum dry density: 114.4 lb/ft³, optimum water content = 14.3 % Laboratory classification is SILTY SAND.

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal).

5.0 to 13.0 ft POORLY…

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File details come from the government source that posted it. Updated May 16, 2025.