Attachment__2_2_00_00_02A_-_Geology.pdf

PDF 8 MB Posted Mar 10, 2023

Attached to: NGWSP SJLWTP Federal contract opportunity
Solicitation number: 140R4023R0016
Issued by: Department of the Interior Bureau of Reclamation

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T H

S A

SHEET

B U

U O

F R

O N

U .S

A R

O F

LAR M TA IOCE N

C A D

A ut oC A D

0s C A D

A M

-5

-6

-R D

-1 .D

W G

S T

S A V

D A

-0 7-

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

W A

R T

A N

GENERAL GEOLOGIC

LEGEND, EXPLANATION

AND NOTES

FARMINGTON, NM 2018-07-26

DHWTP3-17-1

TPWTP3-18-1

BEDROCK ABBREVIATIONS:

CLSTN - CLAYSTONE

GENERAL GEOLOGIC LEGEND

STRATIGRAPHY

GEOLOGIC EXPLANATION GENERAL GEOLOGIC NOTES

Qal

Qtg

Embk

T H

S A

LAR M TA IOCE N

0 400'200'

T H

S A

LAR M TA IOCE N

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

W A

R T

A N

GEOLOGIC SECTIONS

A-A' AND B-B'

FARMINGTON, NM 2018-07-26

0 100' 200'

Vertical Scale 10:1

Vertical Scale 10:1 A

T H

S A

LAR M TA IOCE N

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

W A

R T

A N

GEOLOGIC SECTIONS

C-C' AND D-D'

FARMINGTON, NM 2018-07-26

Vertical Scale 10:1

T H

S A

LAR M TA IOCE N

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

W A

R T

A N

GEOLOGIC SECTIONS

E-E', F-F' AND G-G'

FARMINGTON, NM 2018-07-26

32.0

29.5

34.3

33.8

35.7

33.6

33.8

16.2

13.2

19.6

18.5

21.1

17.3

17.4

4.9

3.3

5.7

5.2

7.0

4.1

2.6

(CL)s

87.8

76.0

90.8

92.3

89.0

86.0

94.4

BOTTOM OF HOLE

5173.3

5167.2

5161.2

5158.9

5130.1

CLSTN

SHALE

CLSTN

SHALE

Qal

12.2

24.0

9.2

7.7

11.0

14.0

5.6

0.0

All measurements are from ground level and are the same as those used by drillers.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: M. Butler

PURPOSE:

Preconstruction soil and bedrock foundation investigations.

DRILL EQUIPMENT:

CME Model 850 track mounted rotary drill rig.

DRILL METHOD:

0.0 to 3.0 ft: 4.25 inch HSA with pilot bit.

3.0 to 26.5 ft: 4.25 inch HSA with dry core system and SPT.

26.5 to 45.0 ft: 4.25 inch HSA with dry core system.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 45.0 ft: None.

HOLE COMPLETION:

Backfilled with bentonite and cuttings.

SAMPLING:

3.0 to 4.5 ft: SPT

5.0 to 6.5 ft: SPT

7.5 to 9.0 ft: SPT

10.0 to 11.5 ft: SPT

12.5 to 14.0 ft: SPT

15.0 to 16.5 ft: SPT

20.0 to 21.5 ft: SPT

25.0 to 26.5 ft: SPT (NR)

0.0 to 1.8 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 1.8 ft LEAN CLAY (CL): About 90% fines with low plasticity, low toughness, medium dry strength and no dilatancy; about 10% fine to coarse, hard, angular sand; maximum size, coarse sand; brown and dry; strong reaction with HCl.

1.8 to 45.0 ft CRETACEOUS MANCOS SHALE (Km)

1.8 to 7.9 ft CLAYSTONE: Light to dark brown color. Laminated to thinly bedded. Very soft (H7) and decomposed (W9) to 4.5 ft. Intensely weathered (W7) below 4.5 ft. CaCOx in laminations. Strong reaction with HCl.

7.9 to 13.9 ft SHALE: Light to dark gray color, laminated to very thinly bedded and fissile. Very soft (H7) and intensely weathered (W7). Gypsum present below 10.4 ft. FeOx and MnOx staining below 13.3 ft. Easily breaks on bedding planes.

Strong reaction with HCl.

13.9 to 16.2 ft CLAYSTONE: Light to dark brown color. Laminated to thinly bedded. Very soft (H7) and intensely weathered (W7). CaCOx in laminations. MnOx and FeOx staining present.

Strong reaction with HCl.

16.2 to 45.0 ft SHALE: Light to dark gray color, laminated to very thinly bedded and fissile.

Moderately soft (H5) and moderately weathered (W5). FeOx, MnOx staining and gypsum present.

Easily breaks on bedding planes. Hard pan, moderately hard (H4) and moderately weathered (W5), encountered between 26.2 to 27.4 ft. Weak reaction with HCl.

STRATIGRAPHY:

0.0 to 1.8 ft QUATERNARY ALLUVIUM (Qal)

1.8 to 45.0 ft CRETACEOUS MANCOS SHALE (Km)

14/40/50

50/NA/NA

21/45/50

17/50/NA

31/42/50

50/NA/NA

COMMENTS:

HSA= hollow stem auger NA= not available ft= feet NE= not encountered NP= non plastic NR= no recovery HCl= hydrochloric acid FeOx= iron oxide CaCOx= calcium carbonate MnOx= manganese oxide SPT= standard penetration test HQ3= coring system SS= sandstone CLSTN= claystone

All angles measured from core 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 Geology Field Manual and Drawing Titled Geology for Designs and Specification as follows "Drawing No. 40-D-6493 Standard Descriptions and Descriptive Criteria for rock. Drawing No.

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

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 6/15/2017

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

GROUND ELEVATION: 5175.1 ft NAD 83

TOTAL DEPTH: 45.0 ft

LABORATORY DATA

DRILL HOLE DHWTP3-17-1

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90°

SHEET 1 OF 1GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-17-1

LOCATION: Site Investigation

BEGUN: 6/14/17 FINISHED: 6/15/17

NOTES

REVIEWED BY: C. Beyer

STATE: New Mexico

HOLE LOGGED BY: P. GardnerDEPTH TO BEDROCK: 1.8 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,075,067.9 E 2,497,016.8 N.M. State Plane

35.0

35.2

37.2

33.2

38.7

34.1

35.6

35.2

21.0

19.6

20.8

15.6

21.6

16.6

18.3

17.9

5.9

7.6

7.5

6.3

7.0

6.9

7.0

6.5

95.2

93.1

98.6

91.0

99.0

96.0

94.1

94.9

BOTTOM OF HOLE

5168.2

5161.8

5145.0

5127.0

(CL)s

CLSTN

SHALE

Qal

4.8

6.9

1.4

9.0

1.0

4.0

5.9

5.1

0.0

All measurements are from ground level and are the same as those used by drillers.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: M. Butler

PURPOSE:

Preconstruction soil and bedrock foundation investigations.

DRILL EQUIPMENT:

CME Model 850 track mounted rotary drill rig.

DRILL METHOD:

0.0 to 2.5 ft: 4.25 inch HSA with pilot bit.

2.5 to 4.0 ft: 4.25 inch HSA and SPT.

4.0 to 5.0 ft: 4.25 inch HSA with pilot bit.

5.0 to 36.5 ft: 4.25 inch HSA with dry core system and SPT.

36.5 to 45.0 ft: 4.25 inch HSA with dry core system.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 45.0 ft: None.

HOLE COMPLETION:

Backfilled with bentonite and cuttings.

SAMPLING:

2.5 to 4.0 ft: SPT

5.0 to 6.5 ft: SPT

7.5 to 9.0 ft: SPT

10.0 to 11.5 ft: SPT

12.5 to 14.0 ft: SPT

15.0 to 16.5 ft: SPT

20.0 to 21.5 ft: SPT

25.0 to 26.5 ft: SPT

30.0 to 31.5 ft: SPT (NR)

35.0 to 36.5 ft SPT (NR)

0.0 to 10.2 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 3.8 ft LEAN CLAY WITH SAND (CL)s: About 85% fines with low plasticity, low toughness, high dry strength and slow dilatancy; about 15% fine to medium sand; maximum size, medium sand; brown and dry; CaCOx stringers and nodules; strong reaction with HCl.

3.8 to 10.2 ft LEAN CLAY (CL): About 95% fines with medium plasticity, medium toughness, high dry strength and no dilatancy; about 5% fine to medium, subangular sand; trace of coarse, hard, subangular gravel; maximum size, 30mm; brown and dry; strong reaction with HCl.

10.2 to 45.0 ft CRETACEOUS MANCOS SHALE (Km)

10.2 to 27.0 ft CLAYSTONE: Light to dark brown color. Laminated to very thinly bedded. Very soft (H7) and very intensely weathered (W8). Carbon blebs and CaCOx in laminations. Gypsum present and sandy. Strong reaction with HCl.

27.0 to 28.2 ft SHALE: Dark gray color and no bedding foliation. Moderately hard (H4) and moderately weathered (W5). Weak reaction with HCl.

28.2 to 45.0 ft SHALE: Light to dark gray color, laminated, sandy and fissile. Moderately soft (H5) and moderately to slightly weathered (W4). Easily breaks on bedding planes. Bedding planes near horizontal. Strong reaction with HCl.

STRATIGRAPHY:

0.0 to 10.2 ft QUATERNARY ALLUVIUM (Qal)

10.2 to 45.0 ft CRETACEOUS MANCOS SHALE (Km)

16/25/24

8/18/17

18/33/41

31/50/NA

18/50/NA

9/32/34

20/30/32

7/33/50

50/NA/NA

COMMENTS:

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

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

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 6/17/2017

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

GROUND ELEVATION: 5172.0 ft NAD 83

TOTAL DEPTH: 45.0 ft

LABORATORY DATA

DRILL HOLE DHWTP3-17-2

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90°

SHEET 1 OF 1GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-17-2

LOCATION: Site Investigation

BEGUN: 6/16/17 FINISHED: 6/17/17

NOTES

REVIEWED BY: C. Beyer

STATE: New Mexico

HOLE LOGGED BY: P. GardnerDEPTH TO BEDROCK: 10.2 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,075,749.0 E 2,498,110.4 N.M. State Plane

40.7

34.0

33.3

31.2

33.6

30.4

21.6

16.9

16.7

13.8

16.4

15.4

7.8

6.3

5.9

5.2

6.0

5.0

(CL)s

g(CL)s

95.5

87.4

84.4

76.9

88.1

55.1

BOTTOM OF HOLE

5184.5

5179.0

5176.0

5166.9

5141.2

CLSTN

SHALE

CLSTN

SHALE

Qal

4.5

11.4

15.6

21.7

11.9

18.2

0.0

1.2

0.0

1.4

0.0

26.7

All measurements are from ground level and are the same as those used by drillers.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: M. Butler

PURPOSE:

Preconstruction soil and bedrock foundation investigations.

DRILL EQUIPMENT:

CME Model 850 track mounted rotary drill rig.

DRILL METHOD:

0.0 to 5.0 ft: 4.25 inch HSA with pilot bit.

5.0 to 26.5 ft: 4.25 inch HSA with dry core system with SPT.

26.5 to 45.0 ft: 4.25 inch HSA with dry core system.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 45.0 ft: None.

HOLE COMPLETION:

Backfilled with bentonite and cuttings.

SAMPLING:

5.0 to 6.5 ft: SPT

7.5 to 9.0 ft: SPT (NR)

10.0 to 11.5 ft: SPT

12.5 to 14.0 ft: SPT

15.0 to 16.5 ft: SPT

20.0 to 21.5 ft: SPT

25.0 to 26.5 ft: SPT

0.0 to 1.7 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 1.7 ft LEAN CLAY (CL): About 90% fines with low plasticity, low toughness, high dry strength and slow dilatancy; about 10% fine to medium sand; maximum size, medium sand; brown and dry; strong reaction with HCl.

1.7 to 45.0 ft CRETACEOUS MANCOS SHALE (Km)

1.7 to 7.2 ft CLAYSTONE: Light to dark brown color. Laminated to very thinly bedded. Very soft (H7) and very intensely weathered (W8). Carbon blebs and CaCOx in laminations. Gypsum present and sandy. Strong reaction with HCl.

7.2 to 10.2 ft SHALE: Light to dark gray and laminated to very thinly bedded. Moderately soft (H5) and moderately weathered (W5). Weak reaction with HCl.

10.2 to 19.3 ft CLAYSTONE: Light to dark brown color. Laminated to very thinly bedded. Very soft (H7) and intensely weathered (W7). Carbon blebs and CaCOx in laminations. Gypsum present and sandy. Strong reaction with HCl.

JOINT MEASUREMENTS:

DEPTH INCL R T HL INFILLING

10.7 16° 4 4 NA CaCOx

19.3 to 45.0 ft SHALE: Light to dark gray color, laminated to very thinly bedded and fissile.

Moderately soft (H5) and moderately weathered (W5). Easily breaks on bedding planes. Bedding planes near horizontal. Weak reaction with HCl.

STRATIGRAPHY:

0.0 to 1.7 ft QUATERNARY ALLUVIUM (Qal)

1.7 to 45.0 ft CRETACEOUS MANCOS SHALE (Km)

23/37/50

50/NA/NA

17/33/26

26/39/33

21/41/44

20/50/NA

50/NA/NA

COMMENTS:

All angles measured from core 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."

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 6/18/2017

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

GROUND ELEVATION: 5186.2 ft NAD 83

TOTAL DEPTH: 45.0 ft

LABORATORY DATA

DRILL HOLE DHWTP3-17-3

PROJECT: Navajo Gallup Water Supply Project

ANGLE FROM HORIZONTAL: -90°

SHEET 1 OF 1GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-17-3

LOCATION: Site Investigation

BEGUN: 6/17/17 FINISHED: 6/18/17

NOTES

REVIEWED BY: C. Beyer

STATE: New Mexico

HOLE LOGGED BY: P. GardnerDEPTH TO BEDROCK: 1.7 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,076,413.3 E 2,499,422.8 N.M. State Plane

36.1

31.6

30.6

19.1

15.8

14.2

6.5

5.2

5.1

(CL)s

94.5

70.3

75.3

BOTTOM OF HOLE

5-7

5167.9

5145.9

5118.9

CLSTN

SHALE

Qal

5.5

29.7

24.7

0.0

All measurements are from ground level and reported in feet unless otherwise noted.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: C. Reynolds, D. Hunter

PURPOSE:

Preconstruction soil and bedrock foundation investigations.

DRILL EQUIPMENT:

CME Model 850 track mounted rotary drill rig.

DRILL METHOD:

0.0 to 3.5: 4.25 inch HSA with pilot bit.

3.5 to 26.0: 4.25 inch HSA and dry core system with SPT and California Sampling.

26.0 to 28.5: 4.25 inch HSA with pilot bit.

28.5 to 38.5: 4.25 inch HSA with dry core system and California Sampling.

38.5 to 50.5: HQ3 diamond core drilling system with 5-foot-long split tube sample barrel.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 38.5: None.

38.5 to 50.5: Water.

DRILLING NOTES:

Auto Hammer set at constant RPM rate of 20-40 blows per minute

HOLE COMPLETION:

Backfilled with bentonite.

SAMPLING:

3.5 to 5.0: SPT

6.0 to 7.0: California (A,B,C)

8.5 to 10.0: SPT

11.0 to 12.0: California (A,B)

13.5 to 15.0: SPT

18.5 to 19.5: California (A,B,C)

23.5 to 25.0: SPT (NR)

28.5 to 29.5: California (NR)

38.8 to 39.6: HQ3 Core (A)

40.0 to 40.5: HQ3 Core (B)

40.5 to 41.5: HQ3 Core (C)

42.6 to 43.3: HQ3 Core (D)

44.8 to 45.2: HQ3 Core (E)

46.5 to 47.5: HQ3 Core (F)

47.7 to 48.7: HQ3 Core (G)

0.0 to 1.5 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 1.5 ft LEAN CLAY (CL): About 90% fines with medium plasticity, medium toughness, medium dry strength and no dilatancy; about 10% fine to medium sand; maximum size, medium sand; brown and dry; strong reaction with HCl.

1.5 to 50.5 ft CRETACEOUS MANCOS SHALE (Km)

1.5 to 23.5 ft CLAYSTONE: Light to dark brown color and sandy. Laminated to very thinly bedded and friable. Very soft (H7) to moderately soft (H5) and intensely weathered (W7). Carbon blebs and FeOx staining present. CaCOx nodules, stringers and in laminations. Grades to shale. Strong reaction with HCl.

23.5 to 25.4 ft SHALE: Light to dark gray color and dry. Laminated to very thinly bedded and fissile.

Moderately hard (H4) and slightly weathered (W3).

FeOx staining present. CaCOx nodules, stringers and in laminations. Bedding planes near horizontal.

Weak reaction with HCl.

25.4 to 50.5 ft SHALE: Light to dark gray color.

Laminated to thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). FeOx staining present. CaCOx nodules, stringers and in laminations. Bedding planes near horizontal.

Claystone interbeds. Weak reaction with HCl.

JOINT MEASUREMENTS:

DEPTH INCL R T HL INFILLING

37.6 88° 6 3 6 CaCOx, FeOx

50.0 90° 6 3 6 CaCOx, FeOx

STRATIGRAPHY:

0.0 to 1.5 ft QUATERNARY ALLUVIUM (Qal)

1.5 to 50.5 ft CRETACEOUS MANCOS SHALE (Km)

24/38/32

28/44

21/39/50

27/27

10/27/39

31/34

30/NA/NA

19/NA

COMMENTS:

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

Drawing No. 40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 12/5/2017

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

TOTAL DEPTH: 50.5 ft

LABORATORY DATA

DRILL HOLE DHWTP3-17-4

PROJECT: Navajo Gallup Water Supply Project

GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-17-4

LOCATION: Site Investigation

BEGUN: 12/4/17 FINISHED: 12/5/17

NOTES

SHEET 1 OF 1

STATE: New Mexico

GROUND ELEVATION: 5169.4 ft NAVD 88

ANGLE FROM HORIZONTAL: -90°

HOLE LOGGED BY: P. Gardner

REVIEWED BY: C. Beyer

DEPTH TO BEDROCK: 1.5 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,076,975.9 E 2,497,567.6 N.M. State Plane

33.5

36.9

36.6

37.4

20.0

20.5

18.8

20.4

8.1

9.0

8.3

7.4

96.0

98.0

97.8

96.8

BOTTOM OF HOLE

5-7

5162.0

5140.6

5116.0

CLSTN

SHALE

Qal

4.0

2.0

2.2

3.2

0.0

All measurements are from ground level and reported in feet unless otherwise noted.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: C. Reynolds, D. Hunter

PURPOSE:

Preconstruction soil and bedrock foundation investigations.

DRILL EQUIPMENT:

CME Model 850 track mounted rotary drill rig.

DRILL METHOD:

0.0 to 4.5: 4.25 inch HSA with pilot bit.

4.5 to 27.8: 4.25 inch HSA and dry core system with SPT and California Sampling.

27.8 to 28.0: 4.25 inch HSA with pilot bit.

28.0 to 50.0: HQ3 diamond core drilling system with 5-foot-long split tube sample barrel.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 28.0: None.

28.0 to 50.0: Water.

DRILLING NOTES:

Auto Hammer set at constant RPM rate of 20-40 blows per minute.

HOLE COMPLETION:

Backfilled with bentonite.

SAMPLING:

4.5 to 6.0: SPT

7.0 to 8.0: California (A,B)

9.5 to 11.0: SPT

12.0 to 13.0: California (A,B)

14.5 to 16.0: SPT

19.5 to 20.5: California (A,B)

24.5 to 26.0: SPT

28.8 to 29.5: HQ3 Core (A)

31.0 to 31.7: HQ3 Core (B)

42.8 to 43.9: HQ3 Core (C)

44.0 to 44.8: HQ3 Core (D)

49.1 to 49.9: HQ3 Core (E)

0.0 to 4.0 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 4.0 ft LEAN CLAY (CL): About 90% fines with low plasticity, low toughness, high dry strength and no dilatancy; about 10% fine sand;

maximum size, fine sand; light brown and dry;

strong reaction with HCl.

4.0 to 50.0 ft CRETACEOUS MANCOS SHALE (Km)

4.0 to 4.8 ft SHALE: Light to dark gray color, sandy, fissile and dry. Bedding is laminated and bedding planes near horizontal. Moderately soft (H5) and moderately to slightly weathered (W4).

Strong reaction with HCl.

4.8 to 25.4 ft CLAYSTONE: Light to dark brown color, sandy and dry. Laminated to thinly bedded and bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and moderately to slightly weathered (W4). Carbon blebs present. CaCOx nodules, stringers and in laminations. Friable and easily breaks on bedding planes. Slakes rapidly in water. Strong reaction with HCl.

25.4 to 27.8 ft SHALE: Light to dark gray color, sandy and dry. Laminated to very thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). FeOx staining present. CaCOx nodules, stringers and in laminations. Bedding planes near horizontal. Weak reaction with HCl.

27.8 to 34.2 ft SHALE: Light to dark gray color, sandy and dry. Laminated to very thinly bedded and fissile. Hard (H3) and slightly weathered (W3).

FeOx staining present. CaCOx nodules, stringers and in laminations. Bedding planes near horizontal.

Weak reaction with HCl.

JOINT MEASUREMENTS:

DEPTH INCL R T HL INFILLING

28.5 0° 4 1 1 CaCOx

34.2 to 50.0 ft SHALE: Light to dark gray color, sandy and dry. Laminated to thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). FeOx staining present. CaCOx nodules, stringers and in laminations. Bedding planes near horizontal. Weak reaction with HCl.

JOINT MEASUREMENTS:

DEPTH INCL R T HL INFILLING

42.8 87° 4 2 3 CaCOx

STRATIGRAPHY:

0.0 to 1.7 ft QUATERNARY ALLUVIUM (Qal)

1.7 to 50.0 ft CRETACEOUS MANCOS SHALE (Km)

16/27/26

22/41

13/20/23

25/46

21/36/42

30/33

20/50/NA

COMMENTS:

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

Drawing No. 40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 12/14/2017

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

TOTAL DEPTH: 50.0 ft

LABORATORY DATA

DRILL HOLE DHWTP3-17-5

PROJECT: Navajo Gallup Water Supply Project

GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-17-5

LOCATION: Site Investigation

BEGUN: 12/13/17 FINISHED: 12/14/17

NOTES

SHEET 1 OF 1

STATE: New Mexico

GROUND ELEVATION: 5166.0 ft NAVD 88

ANGLE FROM HORIZONTAL: -90°

HOLE LOGGED BY: P. Gardner

REVIEWED BY: C. Beyer

DEPTH TO BEDROCK: 4.0 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,076,059.4 E 2,497,390.5 N.M. State Plane

SHALE

40.3

38.7

37.2

25.3

19.5

18.9

7.4

8.0

6.9

96.1

98.4

93.4

BOTTOM OF HOLE

5-7

5156.7

5122.8

5178.4

CLSTN

SHALE

Qal

3.9

1.6

6.6

0.0

All measurements are from ground level and reported in feet unless otherwise noted.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: C. Reynolds, D. Hunter

PURPOSE:

Preconstruction soil and bedrock foundation investigations.

DRILL EQUIPMENT:

CME Model 850 track mounted rotary drill rig.

DRILL METHOD:

0.0 to 4.0: 4.25 inch HSA with pilot bit.

4.0 to 18.6: 4.25 inch HSA and dry core system with SPT and California Sampling.

18.6 to 19.0: 4.25 inch HSA with pilot bit.

19.0 to 51.5: HQ3 diamond core drilling system with 5-foot-long split tube sample barrel.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 19.0: None.

19.0 to 51.5: Water.

DRILLING NOTES:

Auto Hammer set at constant RPM rate of 20-40 blows per minute.

HOLE COMPLETION:

Backfilled with bentonite.

SAMPLING:

4.0 to 5.5: SPT

6.5 to 7.5: California (A,B)

9.0 to 10.5: SPT

11.5 to 12.5: California (A,B)

14.0 to 15.5: SPT

24.7 to 25.2: HQ3 Core (A)

27.0 to 27.7: HQ3 Core (B)

28.3 to 29.2: HQ3 Core (C)

31.7 to 32.7: HQ3 Core (D)

34.9 to 35.5: HQ3 Core (E)

38.3 to 39.0: HQ3 Core (F)

0.0 to 0.9 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 0.9 ft LEAN CLAY (CL): About 95% fines with low plasticity, low toughness, medium dry strength and no dilatancy; about 5% fine sand;

maximum size, fine sand; brown and dry; strong reaction with HCl.

0.9 to 51.5 ft CRETACEOUS MANCOS SHALE (Km)

0.9 to 17.6 ft CLAYSTONE: Light to dark brown color and dry. Laminated to thinly bedded, bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and intensely weathered (W7). Carbon blebs present. CaCOx nodules, stringers and in laminations. Friable, easily breaks on bedding planes. Grades to shale. Strong reaction with HCl.

17.6 to 19.5 ft SHALE: Light to dark gray color and dry. Laminated to very thinly bedded and fissile.

Moderately hard (H4) and slightly weathered (W3).

FeOx staining present. Bedding planes near horizontal. Weak reaction with HCl.

19.5 to 51.5 ft SHALE: Light to dark gray color.

Laminated to very thinly bedded and fissile.

Moderately soft (H5) and slightly weathered (W3).

FeOx staining present. CaCOx in laminations.

Bedding planes near horizontal. Easily separates on bedding planes. Claystone interbeds. No to strong reaction with HCl.

JOINT MEASUREMENTS:

DEPTH INCL R T HL INFILLING

34.2 89° 4 2 3 CaCOx

STRATIGRAPHY:

0.0 to 0.9 ft QUATERNARY ALLUVIUM (Qal)

0.9 to 51.5 ft CRETACEOUS MANCOS SHALE (Km)

13/25/34

45/50

8/33/39

17/34

27/33/28

COMMENTS:

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

Drawing No. 40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 12/15/2017

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

TOTAL DEPTH: 51.5 ft

LABORATORY DATA

DRILL HOLE DHWTP3-17-6

PROJECT: Navajo Gallup Water Supply Project

GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-17-6

LOCATION: Site Investigation

BEGUN: 12/15/17 FINISHED: 12/15/17

NOTES

SHEET 1 OF 1

STATE: New Mexico

GROUND ELEVATION: 5174.3 ft NAVD 88

ANGLE FROM HORIZONTAL: -90°

HOLE LOGGED BY: P. Gardner

REVIEWED BY: C. Beyer

DEPTH TO BEDROCK: 0.9 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,076,266.1 E 2,498,350.0 N.M. State Plane

39.0

38.9

34.9

27.3

21.2

23.8

17.3

12.0

7.0

7.2

6.5

4.2

s(CL)

97.4

96.1

89.5

67.0

BOTTOM OF HOLE

5-7

5159.4

5127.7

5178.0

CLSTN

SHALE

Qal

2.6

3.9

10.5

33.0

0.0

All measurements are from ground level and reported in feet unless otherwise noted.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: C. Reynolds, D. Hunter

PURPOSE:

Preconstruction soil and bedrock foundation investigations.

DRILL EQUIPMENT:

CME Model 850 track mounted rotary drill rig.

DRILL METHOD:

0.0 to 4.0: 4.25 inch HSA with pilot bit.

4.0 to 20.0: 4.25 inch HSA and dry core system with SPT and California Sampling.

20.0 to 51.5: HQ3 diamond core drilling system with 5-foot-long split tube sample barrel.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 20.0: None.

20.0 to 51.5: Water.

DRILLING NOTES:

Auto Hammer set at constant RPM rate of 20-40 blows per minute.

HOLE COMPLETION:

Backfilled with bentonite.

SAMPLING:

4.0 to 5.5: SPT

6.5 to 7.5: California (A,B)

9.0 to 10.5: SPT

11.5 to 12.5: California (A,B)

14.0 to 15.5: SPT

19.0 to 20.0: California (A,B)

20.1 to 20.7: HQ3 Core (A)

37.0 to 40.3: Bag

47.5 to 48.5: HQ3 Core (B)

0.0 to 1.2 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 1.2 ft LEAN CLAY (CL): About 90% fines with low plasticity, low toughness, medium dry strength and no dilatancy; about 10% fine sand;

maximum size, fine sand; brown and dry; strong reaction with HCl.

1.2 to 51.5 ft CRETACEOUS MANCOS SHALE (Km)

1.2 to 19.8 ft CLAYSTONE: Light to dark brown color and dry. Laminated to thinly bedding.

Bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and intensely weathered (W7).

Carbon blebs present. CaCOx in laminations.

Friable and easily breaks on bedding planes.

Slakes rapidly in water. Strong reaction with HCl.

JOINT MEASUREMENTS:

DEPTH INCL R T HL INFILLING

10.9 90° 5 3 1 CaCOx, gypsum

11.0 90° 5 3 1 CaCOx, gypsum

11.5 0° 4 1 1 CaCOx, FeOx, gypsum

19.8 to 21.6 ft SHALE: Light to dark gray color.

Laminated to thinly bedded and fissile. Moderately hard (H4) and moderately to slightly weathered (W4). CaCOx in laminations. Bedding planes near horizontal. Weak reaction with HCl.

21.6 to 22.9 ft SHALE: Light to dark gray color.

Laminated to thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). FeOx staining present. CaCOx nodules, stringers and in laminations. Bedding planes near horizontal. Weak reaction with HCl.

22.9 to 25.1 ft CLAYSTONE: Light to dark brown color. Laminated to thinly bedded. Bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and slightly weathered (W3). Carbon blebs present. CaCOx in laminations. Friable and easily breaks on bedding planes. Grades to shale. Strong reaction with HCl.

25.1 to 37.0 ft SHALE: Light to dark gray color.

Laminated to thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). Carbon blebs present. CaCOx in laminations. Bedding planes near horizontal. Claystone interbeds.

Sandstone interbeds between 35.0 to 37.1 ft. No to weak reaction with HCl.

37.0 to 40.3 ft CLAYSTONE: Light to dark brown color and sandy. Laminated to thinly bedded.

Bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and slightly weathered (W3). Carbon blebs present. CaCOx in laminations. Friable and easily breaks on bedding planes. Grades to shale. Shale and sandstone interbeds. Strong reaction with HCl.

40.3 to 51.5 ft SHALE: Light to dark gray color and sandy. Laminated to thinly bedded and fissile. Very soft (H7) to moderately soft (H5) and slightly weathered (W3). Carbon blebs present. CaCOx in laminations. Bedding planes near horizontal.

Claystone interbed intervals from 45.4 to 46.6 and

48.8 to 50.8 feet. No to weak reaction with HCl.

STRATIGRAPHY:

0.0 to 1.2 ft QUATERNARY ALLUVIUM (Qal)

1.2 to 51.5 ft CRETACEOUS MANCOS SHALE (Km)

17/24/22

25/40

28/43/48

49/50

20/34/38

19/50

COMMENTS:

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

Drawing No. 40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 12/17/2017

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

TOTAL DEPTH: 51.5 ft

LABORATORY DATA

DRILL HOLE DHWTP3-17-7

PROJECT: Navajo Gallup Water Supply Project

GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-17-7

LOCATION: Site Investigation

BEGUN: 12/16/17 FINISHED: 12/17/17

NOTES

SHEET 1 OF 1

STATE: New Mexico

GROUND ELEVATION: 5179.2 ft NAVD 88

ANGLE FROM HORIZONTAL: -90°

HOLE LOGGED BY: P. Gardner

REVIEWED BY: C. Beyer

DEPTH TO BEDROCK: 1.2 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,075,532.3 E 2,499,260.6 N.M. State Plane

33.4

32.6

18.6

17.6

16.9

6.8

6.1

5.9

90.2

86.4

86.1

BOTTOM OF HOLE

5-7

5191.4

5173.7

5143.2

CLSTN

SHALE

Qal

9.8

13.6

13.9

0.0

All measurements are from ground level and reported in feet unless otherwise noted.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: C. Reynolds, D. Hunter

PURPOSE:

Preconstruction soil and bedrock foundation investigations.

DRILL EQUIPMENT:

CME Model 850 track mounted rotary drill rig.

DRILL METHOD:

0.0 to 4.5: 4.25 inch HSA with pilot bit.

4.5 to 29.9: 4.25 inch HSA and dry core system with SPT and California Sampling.

29.9 to 44.5: 4.25 inch HSA with pilot bit.

44.5 to 49.5: 4.25 inch HSA with dry core system.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 49.5: None.

DRILLING NOTES:

Auto Hammer set at constant RPM rate of 20-40 blows per minute.

HOLE COMPLETION:

Backfilled with bentonite.

SAMPLING:

4.5 to 6.0: SPT

7.0 to 8.0: California (B)

9.5 to 11.0: SPT

10.0 to 20.0: Bulk

12.0 to 13.0: California (A)

14.5 to 16.0: SPT

19.5 to 20.5: California (NR)

0.0 to 1.3 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 1.3 ft LEAN CLAY (CL): About 90% fines with medium plasticity, medium toughness, medium dry strength and no dilatancy; about 10% fine sand;

maximum size, fine sand; brown and dry; strong reaction with HCl.

1.3 to 49.5 ft CRETACEOUS MANCOS SHALE (Km)

1.3 to 19.0 ft CLAYSTONE: Light to dark brown color and dry. Laminated to thinly bedded and bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and intensely weathered (W7).

Carbon blebs present. CaCOx nodules, stringers and in laminations. Friable and easily breaks on bedding planes. Grades to shale. No to strong reaction with HCl.

19.0 to 21.9 ft SHALE: Light to dark gray color and dry. Laminated to thinly bedded and fissile.

Moderately hard (H4) and slightly weathered (W3).

FeOx staining present. Bedding planes near horizontal. No to weak reaction with HCl.

21.9 to 49.5 ft SHALE: Light to dark gray color and dry. Laminated to thinly bedded and fissile.

Moderately soft (H5) and slightly weathered (W3).

CaCOx in laminations. Bedding planes near horizontal. Easily separates on bedding planes.

Claystone interbeds. No to weak reaction with HCl.

JOINT MEASUREMENTS:

DEPTH INCL R T HL INFILLING

22.3 75° 4 2 3 CaCOx

23.0 88° 4 2 3 CaCOx

23.3 89° 4 2 3 CaCOx

23.9 90° 4 2 3 CaCOx

STRATIGRAPHY:

0.0 to 1.3 ft QUATERNARY ALLUVIUM (Qal)

0.9 to 49.5 ft CRETACEOUS MANCOS SHALE (Km)

16/45/50

50/50

11/50/NA

50/50

44/50/NA

50/NA

COMMENTS:

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

Drawing No. 40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 12/18/2017

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

TOTAL DEPTH: 49.5 ft

LABORATORY DATA

DRILL HOLE DHWTP3-17-8

PROJECT: Navajo Gallup Water Supply Project

GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-17-8

LOCATION: Site Investigation

BEGUN: 12/18/17 FINISHED: 12/18/17

NOTES

SHEET 1 OF 1

STATE: New Mexico

GROUND ELEVATION: 5192.7 ft NAVD 88

ANGLE FROM HORIZONTAL: -90°

HOLE LOGGED BY: P. Gardner

REVIEWED BY: C. Beyer

DEPTH TO BEDROCK: 1.3 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,074,515.0 E 2,498,924.4 N.M. State Plane

37.7

34.4

30.2

20.7

18.1

15.1

13.5

6.3

5.6

(CL)s

93.8

84.4

72.9

BOTTOM OF HOLE

5-7

5183.6

5177.0

5175.2

5162.9

5146.7 s(CL)

CLSTN

SHALE

CLSTN

SHALE

Qal

6.2

12.8

27.1

0.0

2.8

0.0

All measurements are from ground level and reported in feet unless otherwise noted.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: B. Kenyon, B. Samuels

PURPOSE:

Preconstruction soil and bedrock investigations for trenchless construction methods.

DRILL EQUIPMENT:

CME Model 85 truck mounted rotary drill rig.

DRILL METHOD:

0.0 to 4.0: 4.25 inch HSA with pilot bit.

4.0 to 8.7: 4.25 inch HSA and dry core system with SPT and California Sampling.

8.7 to 11.5: 4.25 inch HSA with pilot bit.

11.5 to 30.0: 4.25 inch HSA and dry core system with SPT and California Sampling.

30.0 to 39.0: 4.25 inch HSA with dry core system.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 39.0: None.

DRILLING NOTES:

Auto Hammer set at constant RPM rate of 20-40 blows per minute.

HOLE COMPLETION:

Backfilled with bentonite.

SAMPLING:

0.0 to 10.0: Bulk

0.0 to 1.0: California (A,B)

4.0 to 5.5: SPT

6.5 to 7.5: California (A,B)

11.5 to 13.0: SPT

14.0 to 15.0: California (A,B)

16.5 to 18.0: SPT

19.0 to 20.0: California (NR)

24.0 to 25.5: SPT (NR)

29.0 to 30.0: California (NR)

0.0 to 2.1 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 2.1 ft SANDY LEAN CLAY s(CL): About 60% fines with low plasticity, low toughness, medium dry strength and no dilatancy; about 40% fine to coarse, hard, subrounded sand; maximum size, coarse sand; brown and dry; CaCOx stringers present, strong reaction with HCl.

2.1 to 39.0 ft CRETACEOUS MANCOS SHALE (Km)

2.1 to 8.7 ft CLAYSTONE: Light to dark brown color. Laminated to thinly bedded and bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and intensely weathered (W7). Carbon blebs present. CaCOx nodules, stringers and in laminations. Friable and easily breaks on bedding planes. Grades to shale. Strong reaction with HCl.

8.7 to 10.5 ft SHALE: Light to dark gray color.

Laminated to thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). Bedding planes near horizontal. No to weak reaction with HCl.

10.5 to 22.8 ft CLAYSTONE: Light to dark brown color. Laminated to thinly bedded and bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and intensely weathered (W7). Carbon blebs present. CaCOx nodules, stringers and in laminations. FeOx present. Friable and easily breaks on bedding planes. Shale interbeds. Strong reaction with HCl.

JOINT MEASUREMENTS:

DEPTH INCL R T HL INFILLING

17.0 60° 4 2 6 CaCOx

18.0 72° 4 3 6 CaCOx

18.1 83° 4 3 6 CaCOx

20.2 58° 4 0 6 CaCOx

20.3 78° 4 0 6 CaCOx

20.5 90° 4 2 6 CaCOx

20.9 90° 4 2 6 CaCOx

21.2 56° 4 3 6 CaCOx

21.8 78° 4 3 6 CaCOx

22.2 90° 4 2 6 CaCOx

22.8 to 39.0 ft SHALE: Light to dark gray color.

Laminated to thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). Bedding planes near horizontal. FeOx staining. No to weak reaction with HCl.

STRATIGRAPHY:

0.0 to 2.1 ft QUATERNARY ALLUVIUM (Qal)

2.1 to 39.0 ft CRETACEOUS MANCOS SHALE (Km)

4/4

19/45/50

48/50

7/25/25

50/38

39/50/NA

35/NA

40/NA/NA

35/NA

COMMENTS:

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

Drawing No. 40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 5/3/2018

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

TOTAL DEPTH: 39.0 ft

LABORATORY DATA

DRILL HOLE DHWTP3-18- 9

PROJECT: Navajo Gallup Water Supply Project

SHEET 1 OF 1GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-18- 9

LOCATION: Road Crossing

BEGUN: 5/2/18 FINISHED: 5/3/18

NOTES

STATE: New Mexico

GROUND ELEVATION: 5185.7 ft NAVD 88

ANGLE FROM HORIZONTAL: -90°

HOLE LOGGED BY: P. Gardner

REVIEWED BY: C. Beyer

DEPTH TO BEDROCK: 2.1 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,076,983.5 E 2,498,846.1 N.M. State Plane

38.9

44.1

31.8

21.8

27.8

14.7

7.1

7.5

4.8

(CL)s

94.3

98.5

77.3

BOTTOM OF HOLE

5-7

5194.3

5184.9

5183.9

5179.6

5155.9

CLSTN

SHALE

CLSTN

SHALE

Qal

5.7

1.5

21.9

0.0

0.8

All measurements are from ground level and reported in feet unless otherwise noted.

DRILLED BY: Upper Colorado Drill Crew DRILLER: B. Lane HELPER: B. Kenyon, B. Samuels

PURPOSE:

Preconstruction soil and bedrock investigations for trenchless construction methods.

DRILL EQUIPMENT:

CME Model 85 truck mounted rotary drill rig.

DRILL METHOD:

0.0 to 4.0: 4.25 inch HSA with pilot bit.

4.0 to 11.2: 4.25 inch HSA and dry core system with SPT and California Sampling.

11.2 to 14.0: 4.25 inch HSA with pilot bit.

14.0 to 21.9: 4.25 inch HSA and dry core system with SPT and California Sampling.

21.9 to 33.5: 4.25 inch HSA with dry core system.

33.5 to 36.5: 4.25 inch HSA with pilot bit.

36.5 to 40.0: 4.25 inch HSA with dry core system.

CASING RECORD:

None used.

DRILLING MEDIUM:

0.0 to 40.0: None.

DRILLING NOTES:

Auto Hammer set at constant RPM rate of 20-40 blows per minute.

HOLE COMPLETION:

Backfilled with bentonite.

SAMPLING:

0.0 to 10.0: Bulk Sample

0.0 to 1.0: California (A,B)

4.0 to 5.5: SPT

6.5 to 7.5: California (A,B)

9.0 to 10.5: SPT

14.0 to 15.0: California (A,B)

16.5 to 18.0: SPT

19.0 to 20.0: California (A)

21.5 to 23.0: SPT (shale)

0.0 to 1.6 ft QUATERNARY ALLUVIUM (Qal)

0.0 to 0.3 ft SILTY SAND (SM): About 65% fine to coarse, hard, subrounded sand; about 35% fines with no plasticity, low dry strength and rapid dilatancy; trace of fine, hard, subangular gravel;

maximum size, 10mm; brown and dry; strong reaction with HCl.

0.3 to 1.6 ft LEAN CLAY (CL): About 90% fines with medium plasticity, medium toughness, high dry strength and no dilatancy; about 10% fine sand;

trace of fine to coarse, hard, subangular to subrounded gravel; maximum size, 60mm; dark brown, dry; CaCOx stringers and nodules present;

strong reaction with HCl.

1.6 to 40.0 ft CRETACEOUS MANCOS SHALE (Km)

1.6 to 11.0 ft CLAYSTONE: Light to dark brown color. Laminated to thinly bedded and bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and intensely weathered (W7). CaCOx laminations. FeOx staining. Friable and easily breaks on bedding planes. Grades to shale. Strong reaction with HCl.

11.0 to 12.0 ft SHALE: Light to dark gray color.

Laminated to thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). Bedding planes near horizontal. No to weak reaction with HCl.

12.0 to 16.3 ft CLAYSTONE: Light to dark brown color. Laminated to thinly bedded and bedding planes near horizontal. Very soft (H7) to moderately soft (H5) and intensely weathered (W7). Carbon blebs present. CaCOx nodules, stringers and in laminations. FeOx present. Friable and easily breaks on bedding planes. Shale interbeds. Strong reaction with HCl.

16.3 to 40.0 ft SHALE: Light to dark gray color.

Laminated to thinly bedded and fissile. Moderately soft (H5) and slightly weathered (W3). Bedding planes near horizontal. FeOx staining. Claystone interbeds. No to weak reaction with HCl.

STRATIGRAPHY:

0.0 to 1.6 ft QUATERNARY ALLUVIUM (Qal)

1.6 to 40.0 ft CRETACEOUS MANCOS SHALE (Km)

3/3

24/48/50

33/50

21/32/42

19/21

37/44/50

50/NA

18/NA/NA

COMMENTS:

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

Drawing No. 40-D-6499 Standard Descriptors and Descriptive Criteria for Discontinuities."

O R

A T

O R

Y C

R A

V E

Q D

S T

D E

M O

U R

E C

O N

T E

N T

W S

H A

R D

N E

S S

O R

E R

E C

O V

E R

DATE MEASURED: 5/9/2018

U A

L C

G E

S Y

M B

O L

W E

A T

H E

A N

FEATURE: San Juan Lateral Water Treatment Plant

SHEET 1 OF 1

TOTAL DEPTH: 40.0 ft

LABORATORY DATA

DRILL HOLE DHWTP3-18-10

PROJECT: Navajo Gallup Water Supply Project

SHEET 1 OF 1GEOLOGIC LOG OF DRILL HOLE NO. DHWTP3-18-10

LOCATION: Road Crossing

BEGUN: 5/4/18 FINISHED: 5/9/18

NOTES

STATE: New Mexico

GROUND ELEVATION: 5195.9 ft NAVD 88

ANGLE FROM HORIZONTAL: -90°

HOLE LOGGED BY: P. Gardner

REVIEWED BY: C. Beyer

DEPTH TO BEDROCK: 1.6 ft

CLASSIFICATION AND

PHYSICAL CONDITION

DEPTH AND ELEVATION OF WATER LEVEL: NE

D E

P T

COORDINATES: N 2,077,383.1 E 2,499,092.9 N.M. State Plane

1.5 ft (5178.2)

2.8 ft (5176.9)

6.0 ft (5173.7)

CLSTN

SHALE

0.0 to 1.5 ft LEAN CLAY : About 90% fines with medium plasticity, medium toughness, medium dry strength and no dilatancy; about 10% predominantly fine sand; maximum size, coarse sand; strong reaction with HCl.

IN-PLACE CONDITION: Dark to light brown and dry, homogeneous and hard.

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal)

1.5 to 2.8 ft CLAYSTONE: Light to dark brown and laminated to thinly bedded. Very soft (H7), intensely weathered (W7) and friable. Grades to shale. Carbon blebs and roots present. CaCOx nodules, stringers and in laminations. Strong reaction with HCl.

GEOLOGIC INTERPRETATION: Cretaceous Mancos Shale (Km)

2.8 to 6.0 ft SHALE: Light to dark gray and laminated to thinly bedded.

Moderately soft (H5), intensely weathered (W7) and fissile. Carbon blebs and claystone laminations. FeOx staining present. Weak reaction with HCl. Recovered as flat, angular, 1 to 10 inch particles.

GEOLOGIC INTERPRETATION: Cretaceous Mancos Shale (Km)

Surface vegetation consists of grasses and weeds. Discontinued excavation at 6.0 feet due to refusal on bedrock.

COMMENTS:

LOG OF TEST PIT NO. TPWTP3-18-1

CLASSIFICATION AND DESCRIPTION OF MATERIAL

(SEE USBR 5000, 5005)D

P T

SHEET 1 OF 1

PROJECT: Navajo Gallup Water Supply Project

GROUND ELEVATION: 5179.70

METHOD OF EXPLORATION: Case 580N Rubber Tire Backhoe

LOGGED BY: P. Gardner

DATE EXCAVATED: 2/21/2018

CLASSIFICATION

GROUP

SYMBOL

FEATURE: San Juan Lateral Water Treatment Plant

LOCATION: Site Investigation

COORDINATES: N 2,076,253 E 2,498,891

APPROXIMATE DIMENSIONS: 2x12x6

DEPTH TO WATER: NE DATE: 2/21/2018

% PLUS 3 in

(BY VOLUME)

3 -in

5 -in

PLUS

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

2.5 ft (5168.1)

6.4 ft (5164.2)

7.3 ft (5163.3)

In-place density taken at 0.5 feet.

(visual) s(CL)

(lab class)

CLSTN

SHALE

0.0 to 2.5 ft LEAN CLAY : About 90% fines with low plasticity, low toughness, medium dry strength and no dilatancy; about 10% fine sand;

trace of fine, hard subangular gravel; maximum size, 20 mm; strong reaction with HCl.

IN-PLACE CONDITION: Brown and dry, homogeneous and hard.

IN-PLACE UNIT WEIGHT AND MOISTURE FROM 0.5 ft.

Total: 94.3 lbf/ft³, 3.8% (78.2% compaction) LAB TEST DATA: 65.6% fines, 33.3% sand, 1.1% gravel LL= 20.2 PI= 8.3

SPG= 2.70

Maximum dry density: 120.6 lbf/ft³, optimum water content= 12.2 % Laboratory classification is SANDY LEAN CLAY.

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal)

2.5 to 6.4 ft CLAYSTONE: Light to dark brown and laminated to thinly bedded. Very soft (H7), intensely weathered (W7) and friable. Grades to shale. Carbon blebs, FeOx staining and roots present. CaCOx nodules, stringers and in laminations. Strong reaction with HCl.

GEOLOGIC INTERPRETATION: Cretaceous Mancos Shale (Km)

6.4 to 7.3 ft SHALE: Light to dark gray and laminated to thinly bedded.

Moderately soft (H5), moderately weathered (W5) and fissile. Carbon blebs and claystone laminations. FeOx staining present. CaCOx nodules, stringers and in laminations. Weak reaction with HCl. Recovered as flat, angular, 1 to 8 inch particles.

GEOLOGIC INTERPRETATION: Cretaceous Mancos Shale (Km) Surface vegetation consists of grasses and weeds. Discontinued excavation at 7.3 feet due to refusal on bedrock.

COMMENTS:

LOG OF TEST PIT NO. TPWTP3-18-2

CLASSIFICATION AND DESCRIPTION OF MATERIAL

(SEE USBR 5000, 5005)D

P T

SHEET 1 OF 1

PROJECT: Navajo Gallup Water Supply Project

GROUND ELEVATION: 5170.59

METHOD OF EXPLORATION: Case 580N Rubber Tire Backhoe

LOGGED BY: P. Gardner

DATE EXCAVATED: 2/21/2018

CLASSIFICATION

GROUP

SYMBOL

FEATURE: San Juan Lateral Water Treatment Plant

LOCATION: Site Investigation

COORDINATES: N 2,076,486 E 2,497,931

APPROXIMATE DIMENSIONS: 2x12x7

DEPTH TO WATER: NE DATE: 2/21/2018

% PLUS 3 in

(BY VOLUME)

3 -in

5 -in

PLUS

1.0 ft (5173.5)

3.0 ft (5171.5)

6.8 ft (5167.7)

Corrosion sample taken at 6.0 ft.

CLSTN

SHALE

0.0 to 2.5 ft LEAN CLAY : About 95% fines with low plasticity, low toughness, medium dry strength and no dilatancy; about 5% fine sand;

maximum size, fine sand; strong reaction with HCl.

IN-PLACE CONDITION: Brown and dry, homogeneous and hard.

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal)

GEOLOGIC INTERPRETATION: Cretaceous Mancos Shale (Km)

6.4 to 6.8 ft SHALE: Light to dark gray and laminated to thinly bedded.

Corrosion sample taken at 6.0 ft.

GEOLOGIC INTERPRETATION: Cretaceous Mancos Shale (Km)

Surface vegetation consists of grasses and weeds. Discontinued excavation at 6.8 feet due to refusal on bedrock.

COMMENTS:

LOG OF TEST PIT NO. TPWTP3-18-3

CLASSIFICATION AND DESCRIPTION OF MATERIAL

(SEE USBR 5000, 5005)D

P T

SHEET 1 OF 1

PROJECT: Navajo Gallup Water Supply Project

GROUND ELEVATION: 5174.51

METHOD OF EXPLORATION: Case 580N Rubber Tire Backhoe

LOGGED BY: P. Gardner

DATE EXCAVATED: 2/22/2018

CLASSIFICATION

GROUP

SYMBOL

FEATURE: San Juan Lateral Water Treatment Plant

LOCATION: Site Investigation

COORDINATES: N 2,075,345 E 2,497,592

APPROXIMATE DIMENSIONS: 2x12x7

DEPTH TO WATER: NE DATE: 2/22/2018

% PLUS 3 in

(BY…

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