Attachment_8__Selected_borehole_logs_from_historical_explorations_at_site_(DH-18-301__DH-18-302)_1.pdf

Attachment 8. Selected borehole logs from historical explorations at site (DH-18-301, DH-18-302)

0.0 to 1.5 ft.

Fill

0.0 to 1.5 ft.: SANDY SILT, s(ML):

About 60% fines with no to low plasticity, low dry strength, slow to rapid dilatancy;

about 40% fine sand; maximum size, fine sand; firm consistency; moist; dark brown;

no reaction with HCl; organic-rich topsoil for grass; abundant grass roots.

1.5 to 10.2 ft.

Embankment: Zone 2 1, 2

1.5 to 6.0 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

About 40% fines with medium plasticity, high dry strength, medium toughness, slow dilatancy; about 35% fine to coarse, soft to moderately soft, subangular sand; about 25% fine to coarse, soft to moderately soft, angular to subangular gravel; maximum size, 2 inches; moist; red-brown; moderate to extensive Fe-ox throughout. Material source is weathered Copley Greenstone, sand and gravel are predominately W7, fracture surfaces surround most fragments and have dark brown/black manganese oxide and iron oxide coating. Trace fragments are W3 Copley Greenstone, no reaction with HCl.

Note: Limited sample volume may be responsible for laboratory's higher gravel content.

6.0 to 10.2 ft.: WELL GRADED GRAVEL WITH SILT, SAND, AND COBBLES, (GW-GM)sc:

About 65% fine to coarse, moderately soft to moderately hard, angular to subangular gravel; about 15% fine to coarse, moderately soft to moderately hard, angular to subangular sand; about 10% fines with low plasticity, medium dry strength, no to low toughness, slow dilatancy; maximum size, 3 inches; moist;

brown; minor iron oxide throughout; sand, gravel, and cobble are predominantly W4-W5 Copley Greenstone with black manganese oxide coating on fracture surfaces; no reaction with HCl.

TOTAL SAMPLE (BY VOLUME): About 10% 3- to 5-inch, hard, angular to subangular cobbles; remainder minus 3 inch.

10.2 to 89.0 ft.

Embankment: Zone 3

10.2 to 14.0 ft.: CLAYEY GRAVEL WITH SAND AND COBBLES, (GC)sc:

About 30% fine to coarse, soft to moderately soft, angular to subangular sand;

about 25% fines with medium plasticity, high dry strength, medium toughness, slow dilatancy; about 45% fine to coarse, soft to moderately soft, angular to subangular gravel; maximum size, 5 inches; moist; red-brown; trace (by volume), 3 to 5 inch, soft to moderately soft, angular cobbles; gravel and cobble fragments are W6-W7 Copley Greenstone; trace roots up to 1/4" diameter; wet zones observed at 12.2-12.5 feet and 14.2-14.5 feet; no reaction with HCl. Minor 0.2- to 0.4-foot thick layers with increased gravel content (GC)sc.

14.0 to 14.2 ft.: SANDY LEAN CLAY, s(CL):

About 60% fines with medium plasticity, medium to high dry strength, low to medium toughness, slow dilatancy; about 40% predominately fine with medium sand; soft consistency; moist; brown to red-brown; moderate iron oxide in areas;

source is likely weathered Copley Greenstone; no reaction with HCl.

14.2 to 14.9 ft.: CLAYEY GRAVEL WITH SAND AND COBBLES, (GC)sc:

About 40% fine to coarse, soft to moderately soft, angular to subangular gravel;

about 35% fines with medium plasticity, high dry strength, low to medium toughness, none to slow dilatancy; about 25% fine to coarse, soft to moderately soft, angular to subangular sand; maximum size, 5 inches; moist; brown to red-brown; trace (by volume), 3 to 5 inch, soft to moderately soft, angular to subangular cobbles; sand, gravel, and cobble are W6-W8 Copley Greenstone that break apart easily with light hand pressure; no reaction with HCl.

14.9 to 15.1 ft.: SANDY LEAN CLAY WITH GRAVEL, s(CL)g:

About 50% fines with medium plasticity, high dry strength, low to medium toughness, none to slow dilatancy; about 35% fine to coarse, soft to moderately soft, angular to subangular sand; about 15% fine, soft to moderately soft, angular to subangular gravel; maximum size, 1/2 inch; moist; brown to red-brown; trace roots 1/8" diameter; no reaction with HCl.

15.1 to 25.7 ft.: CLAYEY GRAVEL WITH SAND AND COBBLES, (GC)sc:

About 40% fine to coarse, soft to moderately soft, angular to subangular gravel;

about 35% fines with medium plasticity, high dry strength, low to medium toughness, none to slow dilatancy; about 25% fine to coarse, soft to moderately soft, angular to subangular sand; maximum size, 5 inches; moist; brown to 22.5 feet, then red-brown; trace (by volume), 3 to 5 inch, soft to moderately soft, angular

E le va ti o n fe et

V is u al

C la ss if ic at io n

F A

D C

R ec o ve ry

D ep th fe et

S P

T B lo w s / 0

.5 f t.

Visual Classification and Physical Condition

S P

T B lo w s / f t.

S P

T

R ec o ve ry

SPT Data

E m b an km en t U n it

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

SHEET 1 OF 6

RECLAMATION

FEATURE: Shasta Dam

Central Valley Project

Managing Water in the West

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-301

PROJECT:

LI

B R

A R

Y

S D

R E

P .G

LB

R E

P O

R T

S

D R

E P

_S P

T

D A

T E

P R

IN

T

E D

7/

/2

TOTAL DEPTH: 89.0 ft. (el. 991.8 ft.)

LOGGED BY: S. Dalton, M. Procsal

REVIEWED BY:

STATE: California

LOCATION: Left Wing Dam; 22 ft. U/S of core wall C/L Sta.

8+94

Dam Embankment Units Abbreviations

FADC:

FAPB:

SPT:

HCl:

NR:

% Recovery:

ANGLE FROM HORIZONTAL: -90o

COORDINATES: N 2,144,233.49 E 6,446,391.10

DATUM: NAD83, State Plane Coordinate System, CA Zone 1 GROUND ELEVATION: 1,080.8 ft. NAVD88

WATER LEVEL DEPTH, DATE: NA, See Notes

DEPTH TO BEDROCK: Not Encountered

START DATE, END DATE: 11/18/2018, 12/12/2018

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Hydrochloric Acid No Recovery Sample/Core Recovery

B

B

Zone 2

Zone 3

Fill s(ML)

(SC)g

(GW-GM)sc

(GC)sc s(CL)

(GC)sc s(CL)g

(GC)sc

Fill

Zone 2

Zone 3

11.9

19.9

37.7

26.3

18.9

27.2

25.2

14.2

(GC)s*

(GP-GM)s*

(GC)s

(GM)s*

36.7

69.2

52.9

37.1 to subangular cobbles; sand, gravel, and cobble are W6-W8 Copley Greenstone that breaks apart easily with light hand pressure; numerous wet zones throughout;

no reaction with HCl.

25.7 to 26.6 ft.: SANDY LEAN CLAY, s(CL):

About 60% fines with medium plasticity, high dry strength, low to medium toughness, no dilatancy; about 30% predominately fine with medium and coarse, soft to moderately hard, angular to subangular sand; about 10% fine to coarse, soft to moderately hard, angular to subangular gravel; maximum size, 3/4 inch; firm to hard consistency; moist; red-brown to yellow-brown; sand and gravel are predominately W7 Copley Greenstone; moderate iron oxide throughout; no reaction with HCl.

26.6 to 27.3 ft.: WELL GRADED GRAVEL WITH SAND, (GW)s:

About 60% fine to coarse, hard, angular to subangular gravel; about 35% fine to coarse, hard, angular to subangular sand; about 5% fines; maximum size, 2 1/2 inches; moist; olive/green; sand and gravel are W1-W3 Copley Greenstone; no reaction with HCl.

27.3 to 30.3 ft.: SANDY LEAN CLAY WITH GRAVEL, s(CL)g:

About 55% fines with medium plasticity, high dry strength, low to medium toughness, no dilatancy; about 30% predominately fine with medium and coarse, soft to moderately hard, angular to subangular sand; about 15% fine to coarse, soft to moderately hard, angular to subangular gravel; maximum size, 3/4 inch; firm to hard consistency; moist; red-brown to yellow-brown; sand and gravel are predominately W7 Copley Greenstone; moderate iron oxide throughout; no reaction with HCl.

30.3 to 30.8 ft.: SILTY SAND WITH GRAVEL, (SM)g:

About 55% fine to coarse, hard, angular to subangular sand; about 30% fine, hard, angular to subangular gravel; about 15% non-plastic fines; maximum size, 3/4 inch;

moist; brown; sand and gravel are W1-W3 Copley Greenstone; no reaction with HCl.

30.8 to 31.8 ft.: SANDY LEAN CLAY, s(CL):

About 55% fines with medium plasticity, high dry strength, low to medium toughness, no dilatancy; about 30% predominately fine with medium and coarse, soft to moderately hard, angular to subangular sand; about 15% fine to coarse, soft to moderately hard, angular to subangular gravel; maximum size, 3/4 inch; firm to hard consistency; moist; red-brown to yellow-brown; sand and gravel are predominately W7 Copley Greenstone; moderate iron oxide throughout; no reaction with HCl.

31.8 to 32.8 ft.: CLAYEY TO SILTY SAND WITH GRAVEL, (SC/SM)g:

About 40% fine to coarse, moderately soft to moderately hard, subangular sand;

about 30% fine, moderately soft to moderately hard, angular to subangular gravel;

about 30% fines with no to low plasticity, medium dry strength, low toughness, slow dilatancy; maximum size, 1/2 inch; moist; mottled red, brown, and yellow-brown;

moderate iron oxide in areas; sand and gravel are W7-W8 Copley Greenstone; no reaction with HCl.

32.8 to 34.8 ft.: SANDY LEAN CLAY, s(CL):

About 55% fines with medium plasticity, high dry strength, low to medium toughness, no dilatancy; about 30% predominately fine with medium and coarse, soft to moderately hard, angular to subangular sand; about 15% fine to coarse, soft to moderately hard, angular to subangular gravel; maximum size, 3/4 inch; firm to hard consistency; moist; red-brown to yellow-brown; sand and gravel are predominately W7 Copley Greenstone; moderate iron oxide throughout; no reaction with HCl.

34.8 to 35.0 ft.: CLAYEY TO SILTY SAND WITH GRAVEL, (SC/SM)g:

About 40% fine to coarse, moderately soft to moderately hard, subangular sand;

about 30% fine, moderately soft to moderately hard, angular to subangular gravel;

about 30% fines with no to low plasticity, medium dry strength, low toughness, slow dilatancy; maximum size, 1/2 inch; moist; mottled red, brown, and yellow-brown;

moderate iron oxide in areas; sand and gravel are W7-W9 Copley Greenstone; no reaction with HCl.

35.0 to 36.0 ft.: SANDY LEAN CLAY WITH GRAVEL, s(CL)g to CLAYEY SAND WITH GRAVEL, (SC)g:

About 50% fines with medium plasticity, high dry strength, low to medium toughness, no dilatancy; about 35% fine to coarse, moderately soft to moderately hard, angular to subangular sand; about 15% fine to coarse, moderately soft to moderately hard, subangular to subrounded gravel; maximum size, 1 inch; moist;

brown to red-brown; color due to iron oxide; no reaction with HCl.

36.0 to 38.4 ft.: POORLY GRADED SAND WITH SILT AND GRAVEL, (SP-SM)g:

E le va ti o n fe et

V is u al

C la ss if ic at io n

F A

D C

R ec o ve ry

D ep th fe et

S P

T B lo w s / 0

.5 f t.

Visual Classification and Physical Condition

S P

T B lo w s / f t.

S P

T

R ec o ve ry

SPT Data

E m b an km en t U n it

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

SHEET 2 OF 6

RECLAMATION

FEATURE: Shasta Dam

Central Valley Project COORDINATES: N 2,144,233.49 E 6,446,391.10

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-301

WATER LEVEL DEPTH, DATE: NA, See Notes

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S

T E

P R

IN

T

E D

7/

/2

GROUND ELEVATION: 1,080.8 ft. NAVD88

TOTAL DEPTH: 89.0 ft. (el. 991.8 ft.)

LOGGED BY: S. Dalton, M. Procsal

REVIEWED BY:

STATE: California

LOCATION: Left Wing Dam; 22 ft. U/S of core wall C/L Sta.

8+94

Dam Embankment Units Abbreviations

FADC:

FAPB:

SPT:

HCl:

NR:

% Recovery:

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: Not Encountered ft. (el. ft.)

START DATE, END DATE: 11/18/2018, 12/12/2018

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Hydrochloric Acid No Recovery Sample/Core Recovery

Zone 2

Zone 3

Fill

(GC)sc s(CL)

(GW)s s(CL)g

(SM)g s(CL)

(SC/SM)g s(CL)

(SC/SM)g s(CL)g/(SC)g

(SP-SM)g s(CL)/SC

(SC)g

SC

(SC)g

(SM)g

(SC)g

Zone 3

48.4

36.6

30.8

42.1

29.1

20.8

20.8

21.6

(SC)g*

(SM)*

(GM)s*

20.8

12.9

34.3

About 60% fine to coarse, moderately soft to moderately hard, angular to subrounded sand; about 30% fine to coarse, moderately soft to moderately hard, subangular to subrounded gravel; about 10% non-plastic fines with low to medium dry strength, no dilatancy; maximum size, 2 inches; moist; brown; no reaction with HCl.

38.4 to 39.0 ft.: SANDY LEAN CLAY, s(CL) to CLAYEY SAND, SC:

About 50% fines with medium plasticity, medium dry strength, low toughness, no dilatancy; about 40% fine to coarse, moderately soft to moderately hard, angular to subrounded sand; about 10% fine, moderately soft to moderately hard, subangular to subrounded gravel; maximum size, 1/2 inch; firm consistency; moist; brown;

gravel not picked up in SPT spoon, classification is biased toward lower gravel content; no reaction with HCl.

39.0 to 40.0 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

About 45% fine to coarse, moderately soft to moderately hard, angular to subrounded sand; about 35% fines with medium plasticity, high dry strength, medium toughness, no dilatancy; about 20% fine to coarse, moderately soft to moderately hard, subangular to subrounded gravel; maximum size, 2 inches; moist;

brown to red-brown; no reaction with HCl.

40.0 to 41.3 ft.: CLAYEY SAND, SC:

About 60% fine to coarse, moderately soft to moderately hard, subangular to subrounded sand; about 30% fines with medium plasticity, medium to high dry strength, low toughness, no dilatancy; about 10% fine, moderately soft to moderately hard, subangular to subrounded gravel; moist; brown; no reaction with HCl.

41.3 to 47.5 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

41.3 to 42.5 ft.: About 40% fine to coarse, hard, subangular to subrounded sand;

about 30% fine to coarse, hard, subangular to subrounded gravel; about 30% fines with medium plasticity, medium to high dry strength, medium toughness, no dilatancy; maximum size, 3 inches; moist; brown; no reaction with HCl.

42.5 to 45.0 ft.: About 50% fine to coarse, moderately soft to moderately hard, subangular to subrounded sand; about 30% fines with medium plasticity, medium to high dry strength, medium toughness, no dilatancy; about 20% fine to coarse, moderately soft to moderately hard, subangular to subrounded gravel;

maximum size, 1 inch; moist; brown with red-brown; 4-inch lift of (GC)s; gravel is W7, H4-H5; mottled iron oxide; no reaction with HCl.

45.0 to 45.5 ft.: About 40% fine to coarse, moderately soft to moderately hard, subangular to subrounded sand; about 30% fines with medium plasticity, medium dry strength, medium toughness, no dilatancy; about 30% fine to coarse, moderately soft to moderately hard, subangular to subrounded gravel;

maximum size, 3/4 inch; moist; red-brown; mottled iron oxide; no reaction with HCl.

45.5 to 46.6 ft.: About 40% fine to coarse, moderately soft to moderately hard, subangular to subrounded sand; about 35% fines with medium plasticity, low toughness, slow dilatancy; about 25% predominately fine with coarse, moderately soft to moderately hard, subangular to subrounded gravel; maximum size, 1 inch; moist; gray/green; no reaction with HCl.

46.6 to 47.5 ft.: About 35% fine to coarse, moderately soft to moderately hard, subangular to subrounded sand; about 30% fine to coarse, moderately soft to moderately hard, subangular to subrounded gravel; about 35% fines with medium plasticity, medium toughness, no dilatancy; maximum size, 2 inches;

moist; red-brown; no reaction with HCl.

47.5 to 49.0 ft.: SILTY SAND WITH GRAVEL, (SM)g:

About 45% fine to coarse, moderately soft to moderately hard, subangular to subrounded sand; about 30% fine to coarse, moderately soft to moderately hard, subangular to subrounded gravel; about 25% fines with no plasticity, medium toughness, no dilatancy; maximum size, 2 inches; moist; red-brown; root surrounded by gray-green clayey soil at 49 ft.; no reaction with HCl.

49.0 to 58.0 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

49.0 to 56.5 ft.: About 50% fine to coarse, moderately soft to moderately hard, angular to subangular sand; about 30% fine to coarse, moderately soft to moderately hard, subangular gravel; about 20% fines with no to low plasticity, low to medium toughness, no dilatancy; maximum size, 3 inches; moist; mottled brown with gray/green on gravel surfaces; no reaction with HCl.

56.5 to 58.0 ft.: About 40% fine to coarse, moderately soft to moderately hard, angular to subangular sand; about 30% fine to coarse, moderately soft to moderately hard, subangular to subrounded gravel; about 30% fines with

E le va ti o n fe et

V is u al

C la ss if ic at io n

F A

D C

R ec o ve ry

D ep th fe et

S P

T B lo w s / 0

.5 f t.

Visual Classification and Physical Condition

S P

T B lo w s / f t.

S P

T

R ec o ve ry

SPT Data

E m b an km en t U n it

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

SHEET 3 OF 6

RECLAMATION

FEATURE: Shasta Dam

Central Valley Project COORDINATES: N 2,144,233.49 E 6,446,391.10

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-301

WATER LEVEL DEPTH, DATE: NA, See Notes

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S

T E

P R

IN

T

E D

7/

/2

GROUND ELEVATION: 1,080.8 ft. NAVD88

TOTAL DEPTH: 89.0 ft. (el. 991.8 ft.)

LOGGED BY: S. Dalton, M. Procsal

REVIEWED BY:

STATE: California

LOCATION: Left Wing Dam; 22 ft. U/S of core wall C/L Sta.

8+94

Dam Embankment Units Abbreviations

FADC:

FAPB:

SPT:

HCl:

NR:

% Recovery:

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: Not Encountered ft. (el. ft.)

START DATE, END DATE: 11/18/2018, 12/12/2018

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Hydrochloric Acid No Recovery Sample/Core Recovery

Zone 2

Zone 3

Fill

(SC)g

(SC)gc

(SC)g

(SC)gc

(SC)g

Zone 3

39.6

47.7

30.4

31.2

20.8

18.5

(SM)g*

(SM)g*

21.1

BOTTOM OF HOLE: T.D. 89.0 ft. (el. 991.8) medium plasticity, low toughness, slow dilatancy; maximum size, 2 inches; dry;

light brown/tan; about 5% of gravels are elongated and flat; no reaction with HCl.

58.0 to 65.0 ft.: CLAYEY SAND WITH GRAVEL AND COBBLES, (SC)gc:

About 40% fine to coarse, moderately soft to hard, angular to subangular sand;

about 30% fine to coarse, moderately soft to hard, subangular to subrounded gravel; about 30% fines with medium plasticity, low toughness, slow dilatancy;

maximum size, 3 inches; dry; light brown/tan; no reaction with HCl.

TOTAL SAMPLE (BY VOLUME): About 5% 3- to 5-inch cobbles; remainder minus 3 inch.

65.0 to 70.5 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

About 40% fine to coarse, moderately soft to hard, subangular sand; about 35% fines with medium plasticity, low to medium toughness, no dilatancy; about 25% predominately fine with coarse, moderately soft to hard, angular to subrounded gravel; maximum size, 2 inches; moist; tan/brown ; no reaction with HCl.

70.5 to 74.0 ft.: CLAYEY SAND WITH GRAVEL AND COBBLES, (SC)gc:

About 40% fine to coarse, moderately soft to hard, subangular to subrounded sand;

about 30% fine to coarse, moderately soft to hard, subangular to subrounded gravel; about 30% fines with medium to high plasticity, low dry strength, low toughness, no dilatancy; maximum size, ½ inch; dry; orange-brown with green/gray; strong organic odor; 2-inch diameter, slightly decomposed root surrounded by gray-green clay at 73 ft.; no reaction with HCl.

TOTAL SAMPLE (BY VOLUME): About 20% 3- to 5-inch, moderately soft to hard, subangular to subrounded cobbles; some H7, W7 greenstone; remainder minus 3 inch.

74.0 to 75.0 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

About 45% fines with medium plasticity, medium dry strength, low toughness, slow dilatancy; about 35% fine to coarse, moderately soft to hard, subangular to subrounded sand; about 20% fine, moderately soft to hard, subangular to subrounded gravel; maximum size, 1/2 inch; dry; orange-brown; strong organic odor; no reaction with HCl.

75.0 to 77.5 ft.: CLAYEY SAND WITH GRAVEL AND COBBLES, (SC)gc:

About 40% fine to coarse, moderately soft to hard, subangular to subrounded sand;

about 30% fine to coarse, moderately soft to hard, subangular to subrounded gravel; about 30% fines with medium to high plasticity, high dry strength, low toughness; moist; orange-brown; strong organic odor; about 20% (by volume) 3 to 5 inch, moderately soft to hard, subangular to subrounded cobbles; no reaction with HCl.

77.5 to 82.5 ft. NO RECOVERY

82.5 to 84.0 ft.: SANDY LEAN CLAY, s(CL):

About 70% fines with medium plasticity, low to medium toughness, no dilatancy;

about 20% fine to medium sand; about 10% fine, moderately soft to hard, subangular to subrounded gravel; maximum size, 3/4 inch; firm consistency; moist;

orange-brown; strong organic odor; no reaction with HCl.

84.0 to 89.0 ft. NO RECOVERY

E le va ti o n fe et

V is u al

C la ss if ic at io n

F A

D C

R ec o ve ry

D ep th fe et

S P

T B lo w s / 0

.5 f t.

Visual Classification and Physical Condition

S P

T B lo w s / f t.

S P

T

R ec o ve ry

SPT Data

E m b an km en t U n it

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

SHEET 4 OF 6

RECLAMATION

FEATURE: Shasta Dam

Central Valley Project COORDINATES: N 2,144,233.49 E 6,446,391.10

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-301

WATER LEVEL DEPTH, DATE: NA, See Notes

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S

T E

P R

IN

T

E D

7/

/2

GROUND ELEVATION: 1,080.8 ft. NAVD88

TOTAL DEPTH: 89.0 ft. (el. 991.8 ft.)

LOGGED BY: S. Dalton, M. Procsal

REVIEWED BY:

STATE: California

LOCATION: Left Wing Dam; 22 ft. U/S of core wall C/L Sta.

8+94

Dam Embankment Units Abbreviations

FADC:

FAPB:

SPT:

HCl:

NR:

% Recovery:

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: Not Encountered ft. (el. ft.)

START DATE, END DATE: 11/18/2018, 12/12/2018

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Hydrochloric Acid No Recovery Sample/Core Recovery

Zone 2

Zone 3

Fill

(SC)gc

NR

s(CL)

NR

Zone 3

57.7 32.9 17.2 s(ML)*37 129.4 0

PURPOSE OF HOLE:

To determine geotechnical and geologic properties of embankment zones 2 and 3.

LOCATION:

Left-wing dam, 22 feet upstream of the centerline of the concrete core wall (Sta. 8+94). In the grass area between two sidewalks.

DRILLED BY:

Bureau of Reclamation: PN Region drill crew:

Driller: Sam Thomas Helper: Taylor Graves

DRILL RIG:

Gus Pech 1300 C truck mounted rig (I472719)

DRILLING AND SAMPLING METHODS :

Drill hole was advanced using flight auger pilot bit (FAPB) and flight auger dry core (FADC) systems.

FAPB was initially used to advance the lead auger to a depth of 2.5 feet, which then allowed for FADC advancement and SPT. FAPB consisted of 6-1/4 inch i.d. by 10-1/4 inch o.d.

hollow flight augers equipped with an 10-1/2 inch o.d. lead drill bit containing six carbide bullet bit teeth around the rim, and a 6-1/4 inch o.d. pilot bit with six carbide bullet teeth set inside the lead drill bit. The pilot bit was attached to NWJ rods. FAPB does not allow for collection of core.

FADC was used to advance the drill hole and collect soil core from 2.5 to 77.5 feet. FADC utilizes the same augers as FAPB. Instead of using a pilot bit, FADC uses a 5-3/8 inch i.d.

by 6 inch o.d. by 5-foot-long split barrel dry coring system. NWJ rods were attached to a free spinning bearing assembly, which is attached to the FADC barrel. The bearing assembly allows for the FADC barrel to remain stationary while the augers rotate and advance the hole. The barrel's cutting shoe was even with the drill bit. A metal "basket" was used in the cutting shoe to assist with retention of core.

SPT was performed at 2.5 foot intervals (1-foot spacing between SPT intervals), unless otherwise noted. SPT consisted of a 1-3/8 inch i.d. by 2 inch o.d. by 2.0 foot long split spoon sampler driven 1.5 feet. Sampler was attached to NWJ rods that weigh about 57.5 lbs/10 ft. The sampler was advanced with an auto-hammer (140 pound weight with a 30 inch drop) at a rate of about 45 blows per minute (drill rig engine at about 700 rpm). The auto-hammer energy was measured on October 23, 2018, resulting in a 90.7% energy correction.

DRILLING CONDITIONS AND NOTES:

0.0 to 2.5 ft.: Fast, smooth advancement.

2.5 to 5.0 ft.: Some auger chatter due to gravel.

5.0 to 7.5 ft.: Driller noted harder drilling at about 6 feet.

7.5 to 10.0 ft.: Good cuttings return.

10.0 to 12.5 ft.: Smooth, moderate advancement, no chatter, minor steam from augers.

15.0 to 17.5 ft.: Augers steaming from heat (friction). Slow, steady advancement.

17.5 to 20.0 ft.: Driller noted softer material, easier advancement.

25.0 to 27.5 ft.: Driller indicated interval is "rocky."

27.5 to 30.0 ft.: Smooth advancement.

30.0 to 32.5 ft.: Augers steaming, rig bogging down a bit due to auger friction. Augers growling.

32.5 to 35.0 ft.: Minimal cuttings.

42.5 to 45.0 ft.: Slower drilling, increased heat/friction.

47.5 to 50.0 ft.: Slow drilling, harder, added about 1 gallon of water during drilling to soften and lubricate cuttings adhering to auger flights.

55.0 to 57.5 ft.: Harder drilling, dense, increase heat/friction.

62.5 to 65.0 ft.: Slower drilling and thin lifts of (GC)s (less than 4 inches).

67.0 ft.: Augers whining.

70.0 to 72.5 ft.: Slow drilling

72.5 to 77.5 ft.: Slow drilling, auger whining, pressure on augers is high. Partially pulled back/lifted auger in an attempt to clean cuttings from auger flights.

77.5 to 82.5 ft.: Pilot bit used due to refusal with FADC.

80.0 to 81.5 ft.: Unable to collect SPT sample, could not break rods. Rod joints were highly torqued/tightened during FAPB advancement.

82.5 to 87.5 ft.: Pilot bit used due to refusal with FADC.

DRILLING FLUID, RETURN, AND COLOR:

0.0 to 47.5 ft.: Drilled without water.

47.5 to 50.0 ft.: Added 1 gallon of water to soften and lubricate cuttings adhering to auger flights.

50.0 to 87.5 ft.: Drilled without water.

REASON FOR HOLE TERMINATION:

Drill hole terminated at 89.0 feet to avoid "Mass Concrete" shown on design drawings extending from the main dam and into the Left Wing Dam to dam axis Sta. 8+70 and at a depth of about 100 feet.

HOLE COMPLETION:

Hole was backfilled with grout comprised of Portland cement, 5% bentonite, and water.

GROUNDWATER LEVELS:

Groundwater was not encountered during drilling. Several wet zones were observed between 12.2 and 20.0 feet, which are noted in the visual classification log.

The following water levels were measured at the start of each day prior to drilling.

11/19/2018: DRY.

11/28/2018: DRY.

11/30/2018: 68.9 feet bgs (0.1 feet from bottom of hole, water likely from rain infiltration)

NOTES

SHEET 5 OF 6

RECLAMATION

FEATURE: Shasta Dam

Central Valley Project COORDINATES: N 2,144,233.49 E 6,446,391.10

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-301

WATER LEVEL DEPTH, DATE: NA, See Notes

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S

T E

P R

IN

T

E D

7/

/2

GROUND ELEVATION: 1,080.8 ft. NAVD88

TOTAL DEPTH: 89.0 ft. (el. 991.8 ft.)

LOGGED BY: S. Dalton, M. Procsal

REVIEWED BY:

STATE: California

LOCATION: Left Wing Dam; 22 ft. U/S of core wall C/L Sta.

8+94

Dam Embankment Units Abbreviations

FADC:

FAPB:

SPT:

HCl:

NR:

% Recovery:

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: Not Encountered ft. (el. ft.)

START DATE, END DATE: 11/18/2018, 12/12/2018

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Hydrochloric Acid No Recovery Sample/Core Recovery

Zone 2

RESERVOIR WATER ELEVATIONS:

Elevations are from NADV29 (add 2.8 ft. to convert to NADV88) 11/18/2018: 965.54 ft 11/19/2018: 965.45 ft 11/27/2018: 966.15 ft 11/28/2018: 966.19 ft 11/29/2018: 967.04 ft 11/30/2018: 967.32 ft 12/1/2018: 967.34 ft 12/2/2018: 967.41 ft 12/3/2018: 967.48 ft 12/4/2018: 967.62 ft 12/5/2018: 967.72 ft 12/11/2018: 967.71 ft 12/12/2018: 967.66 ft

MISCELLANEOUS:

1 The source of embankment materials was from required as-excavated material during dam construction; therefore, gravel and cobble are comprised of weathered Copley Greenstone.

2 Embankment zoning below the top of the Left Wing Dam core wall (approximately 8 feet below existing ground) and within the excavation for the core wall appear to have been constructed in general accordance with Specification Drawing 214-D-777. Embankment materials placed above the core wall and beyond the excavation for the core wall appear to have been constructed with miscellaneous and similar material types consisting primarily of Clayey Gravel with Sand and Cobble, (GC)sc and to a lesser degree Clayey Sand with Gravel and Cobble, (SC)gc. Due to similar physical properties between miscellaneous embankment materials and Zones 2 and 5, as well as lateral and vertical variability in each of these materials/Zones, it is not feasible to differentiate miscellaneous embankment from zoned embankment. Therefore, it is conceivable that materials logged as Zones 2 and 5 in some of the test pits and upper portions of drill holes are in fact miscellaneous embankment.

* = Laboratory derived Plasticity Index and Liquid Limit values plot near/along the "A" Line on the Plasticity Chart; therefore, fine grained materials and/or fine grained fraction of coarse grained materials may have engineering properties of Lean Clay (CL) and Silt (ML).

B = A basket was used in the cutting shoe of the SPT sampler. Use of a basket results in a minor increase in resistance during sampler advancement, which results in slightly biased high blow count values.

SPT Gravel Interference: Significant gravel content was present in each SPT interval. Gravel is primarily comprised of Decomposed (W9) to Intensely Weathered (W7), very soft (H7) to moderately soft (H5) Copley Greenstone. Due to the "soft" nature of the gravel, SPT advancement over the full interval was possible. However, gravel was wedged in the sampler's cutting shoe for a majority of the test intervals, which resulted in reduced recovery and increased penetration resistance. Special consideration and/or a gravel correction factor(s) should be applied to field SPT blow count values.

NOTES

SHEET 6 OF 6

RECLAMATION

FEATURE: Shasta Dam

Central Valley Project COORDINATES: N 2,144,233.49 E 6,446,391.10

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-301

WATER LEVEL DEPTH, DATE: NA, See Notes

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S

T E

P R

IN

T

E D

7/

/2

GROUND ELEVATION: 1,080.8 ft. NAVD88

TOTAL DEPTH: 89.0 ft. (el. 991.8 ft.)

LOGGED BY: S. Dalton, M. Procsal

REVIEWED BY:

STATE: California

LOCATION: Left Wing Dam; 22 ft. U/S of core wall C/L Sta.

8+94

Dam Embankment Units Abbreviations

FADC:

FAPB:

SPT:

HCl:

NR:

% Recovery:

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: Not Encountered ft. (el. ft.)

START DATE, END DATE: 11/18/2018, 12/12/2018

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Hydrochloric Acid No Recovery Sample/Core Recovery

Zone 2

DH‐18‐301: Embankment Zone 2 from 0 to 10.2 feet and Zone 3 from 5.3 to 14.0 feet. No recovery from 0 to 2.5 feet.

(Photos: Steve Dalton 11/18/2018)

14.0

12.0

10.0

8.0

6.5

4.5

12.0

10.0

8.0

6.5

4.5

Emb Zone 2

Emb Zone 310.2 ft.

DH‐18‐301: Embankment Zone 3 from 14.0 to 26.5 feet. (Photos: Steve Dalton 11/18‐19/2018)

24.5

22.5

20.0

18.0

16.0

14.0

24.5

22.5

20.0

18.0

16.0

26.5

DH‐18‐301: Embankment Zone 3 from 26.5 to 39.0 feet. (Photos: Steve Dalton and Mike Procsal 11/19‐28/2018)

37.0

34.5

32.5

30.5

28.5

26.5

37.0

34.5

32.5

30.5

28.5

39.0

DH‐18‐301: Embankment Zone 3 from 39.0 to 51.0 feet. (Photos: Mike Procsal 11/28‐29/2018)

49.0

47.0

45.0

43.0

41.0

39.0

49.0

47.0

45.0

43.0

41.0

51.0

DH‐18‐301: Embankment Zone 3 from 51.0 to 63.0 feet. (Photos: Mike Procsal 11/29/2018)

61.0

59.0

57.0

55.0

53.0

51.0

61.0

59.0

57.0

55.0

53.0

63.0

DH‐18‐301: Embankment Zone 3 from 63.0 to 75.0 feet. (Photos: Mike Procsal 11/29‐30/2018)

73.0

71.0

69.0

67.0

65.0

63.0

73.0

71.0

69.0

67.0

65.0

75.0

No Recovery

79.0 to 82.5 ft.

DH‐18‐301: Embankment Zone 3 from 75.0 to 84.0 feet. Limited recovery in lower 10 feet of hole. (Photos: Mike Procsal 11/30 to 12/1/2018)

77.0

75.0

77.0

79.0

82.5 84.0 No Recovery

79.0 to 89.0 ft.

(total depth of drill hole)

SPT

0.0 to 1.3 ft.

0.0 to 1.3 ft.: SILTY SAND, SM:

About 80% fine to medium sand; about 20% non-plastic fines with no to low dry strength, rapid dilatancy; moist; dark brown; topsoil, lots of small plant roots, earthworms, wood roots; no reaction with HCl.

1.3 to 12.2 ft.

Embankment: Zone 2 1, 2

1.3 to 2.7 ft.: SANDY LEAN CLAY WITH GRAVEL, s(CL)g:

About 60% fines with low to medium plasticity, low dry strength, medium toughness, slow dilatancy;

about 20% predominately fine with coarse, hard, subangular to subrounded gravel; about 20% fine to coarse, hard, subangular to subrounded sand;

maximum size, 1 inch; moist; red-brown; trace wood roots (<1/8-inch diameter); no reaction with HCl.

2.7 to 5.4 ft.: WELL GRADED GRAVEL WITH CLAY AND SAND AND COBBLES, (GW-GC)sc:

About 60% fine to coarse, hard, angular to subangular gravel; about 30% predominately coarse with fine and medium, hard, angular to subangular sand; about 10% fines with low to medium plasticity, low dry strength, low toughness, rapid dilatancy; trace (by volume), 3 to 5 inch, hard, angular to subangular cobbles;

maximum size, 4 inches; dry; brown and green-gray; angular gravels and cobbles consist of broken fragments of Copley Greenstone; no reaction with HCl.

5.4 to 6.4 ft.: SANDY LEAN CLAY, s(CL):

About 55% fines with medium plasticity, medium dry strength, medium toughness, none to slow dilatancy; about 40% fine to coarse, hard, angular to subangular sand; about 5% fine, hard, angular to subangular gravel; maximum size, 1/2 inch; very soft consistency; moist; yellow-brown; no reaction with HCl.

6.4 to 12.2 ft.: WELL GRADED GRAVEL, GW:

About 80% fine to coarse, hard, angular gravel;

about 12% fine to coarse, hard, angular to subangular sand; about 8% fines; maximum size,

2.25 inches; moist; yellow-brown; trace rootlets;

no reaction with HCl.

12.2 to 70.0 ft.

Embankment: Zone 3

12.2 to 15.6 ft.: CLAYEY GRAVEL WITH SAND, (GC)s:

About 50% fine to coarse, soft to moderately hard, angular to subangular gravel; about 30% fines with low plasticity, high dry strength, low to medium toughness, slow dilatancy; about 20% predominately medium with fine and coarse, soft to moderately hard, angular to subangular sand;

maximum size, 2.5 inches; soft to firm consistency; moist; red-brown; gravel mostly consists of intensely weathered Copley Greenstone, with minor red chert; no reaction with HCl. At 14.5 feet, there is a thin (<1-inch) saturated zone.

15.6 to 18.7 ft.: SILTY SAND WITH GRAVEL, (SM)g:

About 40% fine to coarse, hard, angular to subangular sand; about 35% non-plastic fines with rapid dilatancy; about 25% fine, hard, angular gravel; maximum size, 3/4 inch; moist; mottled

S P

T B lo w s / f t.

F A

D C

R ec o ve ry

Visual Classification and Physical Condition

S P

T B lo w s / 0

.5 f t.

SPT Data

E le va ti o n fe et

V is u al

C la ss if ic at io n

D ep th fe et

S P

T

R ec o ve ry

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

H Q

R ec o ve ry

R o ck Q u al it y

D en si ty

R

Q D

F ra ct u re D en si ty

F D

H ar d n es s

(H

W ea th er in g

W

Rock Properties

E m b an km en t

F o u n d at io n

U n it

Shasta Dam

Central Valley Project COORDINATES: N 2,144,107.98 E 6,446,444.44

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

TOTAL DEPTH: 84.5 ft. (el. 996.4 ft.)

LOGGED BY: B. Holmes, J. Sturm

REVIEWED BY:WATER LEVEL DEPTH, DATE: NA, See NotesLeft Wing Dam; 28 ft. U/S of core wall C/L Sta.

7+58

Abbreviations

FADC:

FAPB:

SPT:

HQ3:

HCl:

NR:

% Recovery:

psf:

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Triple tube rock coring system (2.4-inch diameter core) Hydrochloric Acid No Recovery Sample/Core Recovery Pounds per square foot

GROUND ELEVATION: 1080.9 ft. NAVD88

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: 70.0 ft. (el. 1010.9 ft.)

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S P

T _R

O C

K

T E

P R

IN

T

E D

7/

/2

STATE: California

LOCATION:

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-302 SHEET 1 OF 7

RECLAMATION

Embankment and Geologic Foundation Units

Dam Embankment Foundation

Copley Greenstone

FEATURE:

START DATE, END DATE: 10/20/2018, 11/3/2018

B

B

B

B

Zone 2

Fill

Zone 3

Dcg

23.0

23.4

(GP-GC)*

(GC)s*

Fill

Zone 2

Zone 3

SM

s(CL)g

(GW-GC)sc s(CL)

GW

(GC)s

(SM)g red-brown with tan-brown; gravel consists of intensely weathered Copley Greenstone, in-place material is very dense and has the appearance of decomposed rock, minor fragments of red chert;

no reaction with HCl.

18.7 to 20.9 ft.: SILTY SAND WITH GRAVEL, (SM)g:

About 40% fine to coarse, hard, angular to subangular sand; about 30% fine to coarse, hard, angular to subangular gravel; about 30% non-plastic fines with rapid dilatancy; maximum size, 1.5 inches; moist; yellow-brown; no reaction with HCl.

20.9 to 24.2 ft.: COBBLES WITH SILTY GRAVEL WITH SAND, COBBLES with (GM)s:

About 60% fine to coarse, hard, angular gravel;

about 20% fine to coarse, hard, angular to subangular sand; about 20% fines; dry; light green-gray; true thickness of this zone is unknown due to poor recovery, fragments are Copley Greenstone, fresh, intensely fractured; no reaction with HCl.

TOTAL SAMPLE (BY VOLUME): About 80% 3- to 5-inch, hard, angular cobbles; trace, 5- to 12-inch, hard, angular cobbles; maximum size, 5.5 inches;

remainder minus 3 inch.

24.2 to 27.0 ft.: SILTY SAND WITH GRAVEL, (SM)g:

About 40% fine to coarse, hard, angular to subangular sand; about 30% fine to coarse, hard, angular to subangular gravel; about 30% non-plastic fines with rapid dilatancy; maximum size, 2 inches; moist; yellow-brown; no reaction with HCl.

27.0 to 27.9 ft.: WELL GRADED GRAVEL WITH SAND AND COBBLES, (GW)sc:

About 60% fine to coarse, hard, angular gravel;

about 40% fine to coarse, hard, angular sand;

trace fines; trace (by volume), 3- to 5-inch, hard, angular cobbles; maximum size, 3.5 inches; dry;

gray-brown; no reaction with HCl.

27.9 to 34.7 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

About 40% fine to coarse, hard, angular to subangular sand; about 35% fines with medium plasticity, high dry strength, low toughness, slow dilatancy; about 25% fine, hard, angular gravel;

maximum size, 3/4 inch; moist; yellow-brown then red-brown from 32.5 feet; no reaction with HCl.

34.7 to 36.3 ft.: SILTY SAND WITH GRAVEL, (SM)g:

About 50% fine to coarse, hard, angular to subangular sand; about 30% non-plastic fines with rapid dilatancy; about 20% fine to coarse, hard, angular to subangular gravel; maximum size, 1 inch; moist; brown and red-brown; at 36.3 feet is a 1/4-inch diameter piece of wood and a thin (1/4-inch) lense of blue-gray medium sand; no reaction with HCl.

36.3 to 38.9 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

About 50% fine to coarse, hard, angular to subangular sand; about 30% fines with low plasticity, high dry strength, low toughness, slow to rapid dilatancy; about 20% fine to coarse, hard, angular to subangular gravel; maximum size, 1.5 inches; moist; red-brown; soil is denser than previous interval until a loose zone at 38.8 to 38.9 feet; no reaction with HCl.

S P

T B lo w s / f t.

F A

D C

R ec o ve ry

Visual Classification and Physical Condition

S P

T B lo w s / 0

.5 f t.

SPT Data

E le va ti o n fe et

V is u al

C la ss if ic at io n

D ep th fe et

S P

T

R ec o ve ry

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

H Q

R ec o ve ry

R o ck Q u al it y

D en si ty

R

Q D

F ra ct u re D en si ty

F D

H ar d n es s

(H

W ea th er in g

W

Rock Properties

E m b an km en t

F o u n d at io n

U n it

Shasta Dam

Central Valley Project COORDINATES: N 2,144,107.98 E 6,446,444.44

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

TOTAL DEPTH: 84.5 ft. (el. 996.4 ft.)

LOGGED BY: B. Holmes, J. Sturm

REVIEWED BY:WATER LEVEL DEPTH, DATE: NA, See NotesLeft Wing Dam; 28 ft. U/S of core wall C/L Sta.

7+58

Abbreviations

FADC:

FAPB:

SPT:

HQ3:

HCl:

NR:

% Recovery:

psf:

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Triple tube rock coring system (2.4-inch diameter core) Hydrochloric Acid No Recovery Sample/Core Recovery Pounds per square foot

GROUND ELEVATION: 1080.9 ft. NAVD88

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: 70.0 ft. (el. 1010.9 ft.)

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S P

T _R

O

T E

P R

IN

T

E D

7/

/2

STATE: California

LOCATION:

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-302 SHEET 2 OF 7

RECLAMATION

Embankment and Geologic Foundation Units

Dam Embankment Foundation

Copley Greenstone

FEATURE:

START DATE, END DATE: 10/20/2018, 11/3/2018

B

B

B

Zone 2

Fill

Zone 3

Dcg

Zone 3

(SM)g

COBBLES

with

(GM)s

(SM)g

(GW)sc

(SC)g

(SM)g

(SC)g s(CL) /

SC

38.9 to 41.3 ft.: SANDY LEAN CLAY to CLAYEY SAND, s(CL)/SC:

About 50% fines with medium plasticity, high dry strength, medium toughness, slow dilatancy; about 40% predominately fine with medium and coarse, hard, angular to subangular sand; about 10% fine, soft, angular to subangular gravel; maximum size, 1/2 inch; hard consistency; moist; mottled red-brown with tan-gray; gravel consists of intensely weathered rock; no reaction with HCl.

41.3 to 42.6 ft.: CLAYEY GRAVEL WITH SAND, (GC)s:

About 40% fine, hard, angular to subangular gravel; about 30% fine to coarse, hard, angular to subangular sand; about 30% fines with low plasticity, high dry strength, low toughness, slow dilatancy; maximum size, 1/2 inch; dry; brown and red-brown; no reaction with HCl.

42.6 to 45.0 ft.: SANDY LEAN CLAY WITH GRAVEL to CLAYEY SAND WITH GRAVEL, s(CL)g/(SC)g:

About 50% fines with medium plasticity, high dry strength, medium toughness, slow dilatancy; about 35% fine to coarse, hard, angular to subangular sand; about 15% fine, soft, angular to subangular gravel; maximum size, 1/2 inch; moist; mottled red-brown with tan-brown; weak sulfuric odor from

44.1 to 44.5 feet; zone of blue-gray color from 44.1 to 44.5 feet, which contained a piece of wood (3.5-inch diameter); no reaction with HCl.

45.0 to 46.5 ft.: SILTY SAND WITH GRAVEL, (SM)g:

About 50% fine to coarse, hard, angular to subangular sand; about 30% fines with no to low plasticity, low toughness; about 20% fine to coarse, hard, angular to subangular gravel;

maximum size, 1 inch; moist; brown; similar to

34.7 to 36.3; soil is loose; no reaction with HCl.

46.5 to 48.0 ft.: SANDY LEAN CLAY WITH GRAVEL to CLAYEY SAND WITH GRAVEL, s(CL)g/(SC)g:

About 50% fines with medium plasticity, high dry strength, medium toughness, slow dilatancy; about 35% fine to coarse, hard, angular to subangular sand; about 15% fine, soft to hard, angular to subangular gravel; maximum size, 3/4 inch; hard consistency; moist; red-brown; no reaction with HCl.

48.0 to 49.5 ft.: CLAYEY GRAVEL, GC:

About 70% fine, soft to hard, angular to subangular gravel; about 20% fines with medium plasticity, high dry strength, medium toughness, slow dilatancy; about 10% fine to coarse, hard, angular to subangular sand; maximum size, 3/4 inch; moist; red-brown; no reaction with HCl.

49.5 to 50.5 ft.: SANDY LEAN CLAY TO FAT CLAY, s(CL/CH):

About 60% fines with high plasticity, high dry strength, medium toughness, none to slow dilatancy; about 40% predominately fine with medium and coarse, hard, angular to subangular sand; trace fine, hard, angular gravel; maximum size, 1/2 inch; hard consistency; dry; brown; no reaction with HCl.

50.5 to 55.0 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

About 48% fines with medium plasticity, high dry strength, low toughness, slow dilatancy; about 32% fine to coarse, hard, angular to subangular sand; about 20% fine to coarse, hard, angular

S P

T B lo w s / f t.

F A

D C

R ec o ve ry

Visual Classification and Physical Condition

S P

T B lo w s / 0

.5 f t.

SPT Data

E le va ti o n fe et

V is u al

C la ss if ic at io n

D ep th fe et

S P

T

R ec o ve ry

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

H Q

R ec o ve ry

R o ck Q u al it y

D en si ty

R

Q D

F ra ct u re D en si ty

F D

H ar d n es s

(H

W ea th er in g

W

Rock Properties

E m b an km en t

F o u n d at io n

U n it

Shasta Dam

Central Valley Project COORDINATES: N 2,144,107.98 E 6,446,444.44

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

TOTAL DEPTH: 84.5 ft. (el. 996.4 ft.)

LOGGED BY: B. Holmes, J. Sturm

REVIEWED BY:WATER LEVEL DEPTH, DATE: NA, See NotesLeft Wing Dam; 28 ft. U/S of core wall C/L Sta.

7+58

Abbreviations

FADC:

FAPB:

SPT:

HQ3:

HCl:

NR:

% Recovery:

psf:

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Triple tube rock coring system (2.4-inch diameter core) Hydrochloric Acid No Recovery Sample/Core Recovery Pounds per square foot

GROUND ELEVATION: 1080.9 ft. NAVD88

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: 70.0 ft. (el. 1010.9 ft.)

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S P

T _R

O

T E

P R

IN

T

E D

7/

/2

STATE: California

LOCATION:

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-302 SHEET 3 OF 7

RECLAMATION

Embankment and Geologic Foundation Units

Dam Embankment Foundation

Copley Greenstone

FEATURE:

START DATE, END DATE: 10/20/2018, 11/3/2018

B

B

B

B

B

B

B

B

Zone 2

Fill

Zone 3

Dcg

24.8

18.5

21.1

(GC)s

(GC)s*

(GM)s*

Zone 3 s(CL) /

SC

(SC)g s(CL)g / (SC)g

(SM)g s(CL)g / (SC)g

GC

s(CL/CH)

(SC)g

W9

W7

W5

H6- H7

H4

H3 gravel; maximum size, 1 inch; moist; brown;

blue-gray color observed in thin (<0.1-foot) lenses at 50.7 feet and 52.3 feet; two pieces of wood (both <1/4-inch diameter) at 52.3 feet; no reaction with HCl.

55.0 to 70.0 ft.: CLAYEY SAND WITH GRAVEL, (SC)g:

55.0 to 65.0 ft.: About 40% fines with medium plasticity, high dry strength, medium toughness, slow dilatancy; about 30% fine to coarse, hard, angular gravel; about 30% fine to coarse, hard, angular to subangular sand; maximum size, 1.5 inches; moist; red-brown; clast of decomposed granite between 64.0 and 64.4 feet; no reaction with HCl.

65.0 to 65.6 ft.: About 50% fine to coarse, hard, angular to subangular sand; about 30% fines;

about 20% fine to coarse, hard, angular gravel;

maximum size, 1 inch; moist to wet; light yellow-brown; no reaction with HCl.

65.6 to 65.9 ft.: About 50% fines; about 40% fine to coarse, hard, angular to subangular sand; about 10% fine to coarse, hard, angular gravel; soft consistency; moist to wet; light tan;

no reaction with HCl.

65.9 to 69.0 ft.: About 50% fine to coarse, hard, angular to subangular sand; about 30% fines;

about 20% fine to coarse, hard, angular gravel;

moist to wet; light yellow-brown; no reaction with HCl.

69.0 to 70.0 ft.: About 40% fine to coarse, hard, angular to subangular sand; about 40% fines;

about 20% fine to coarse, hard, angular gravel;

maximum size, 3/4 inch; dry to moist; light yellow-brown; no reaction with HCl.

70.0 to 84.5 ft.

Copley Greenstone Formation, Dcg

* Fracture density is used throughout this log and most accurately describes "joint" density. A detailed log of joints and other discontinuities is attached.

70.0 to 74.0 ft.: DECOMPOSED (W9):

Recovered as silty fines, sand, and angular, fine and coarse, angular gravel-size rock fragments.

Firm to hard soil; soft (H6) to very soft (H7) rock.

Core gouges with knife blade, breaks with light manual pressure, crumbles with light to moderate manual pressure to silty sand with gravel, (SM)g;

hard fragments break with moderate hammer blow. Unfractured.

70.3 to 72.5 ft.: Yellow-brown; dry to moist.

72.5 to 74.0 ft.: Tan; dry. Relict joints and fractures evident as dark brown to black hairline streaks and splotches.

74.0 to 74.5 ft. NO RECOVERY

74.5 to 84.5 ft.: INTENSELY WEATHERED (W7):

Aphanitic to poorly preserved, finely porphyritic texture; yellow-brown with dark brown to black oxide staining and paper-thin coatings on smooth to slightly rough joint surfaces; intensely fractured (FD7), recovered mostly as 0.1-0.3-foot fragments and short core lengths with a few narrow zones of angular, gravel-size fragments; moderately hard (H4), core lengths and fragments break with

S P

T B lo w s / f t.

F A

D C

R ec o ve ry

Visual Classification and Physical Condition

S P

T B lo w s / 0

.5 f t.

SPT Data

E le va ti o n fe et

V is u al

C la ss if ic at io n

D ep th fe et

S P

T

R ec o ve ry

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

H Q

R ec o ve ry

R o ck Q u al it y

D en si ty

R

Q D

F ra ct u re D en si ty

F D

H ar d n es s

(H

W ea th er in g

W

Rock Properties

E m b an km en t

F o u n d at io n

U n it

Shasta Dam

Central Valley Project COORDINATES: N 2,144,107.98 E 6,446,444.44

DATUM: NAD83, State Plane Coordinate System, CA Zone 1

Managing Water in the West

TOTAL DEPTH: 84.5 ft. (el. 996.4 ft.)

LOGGED BY: B. Holmes, J. Sturm

REVIEWED BY:WATER LEVEL DEPTH, DATE: NA, See NotesLeft Wing Dam; 28 ft. U/S of core wall C/L Sta.

7+58

Abbreviations

FADC:

FAPB:

SPT:

HQ3:

HCl:

NR:

% Recovery:

psf:

Flight Auger Dry Core Flight Auger Pilot Bit Standard Penetration Test (field/uncorrected values) Triple tube rock coring system (2.4-inch diameter core) Hydrochloric Acid No Recovery Sample/Core Recovery Pounds per square foot

GROUND ELEVATION: 1080.9 ft. NAVD88

ANGLE FROM HORIZONTAL: -90o

DEPTH TO BEDROCK: 70.0 ft. (el. 1010.9 ft.)

PROJECT:

LI

B R

A R

Y

S D

R E

P

P O

R T

S

D R

E P

_S P

T _R

O

T E

P R

IN

T

E D

7/

/2

STATE: California

LOCATION:

GEOLOGIC LOG OF DRILL HOLE NO. DH-18-302 SHEET 4 OF 7

RECLAMATION

Embankment and Geologic Foundation Units

Dam Embankment Foundation

Copley Greenstone

FEATURE:

START DATE, END DATE: 10/20/2018, 11/3/2018

B

B

B

B

FD9

FD7

Zone 2

Fill

Zone 3

Dcg

21.5

19.7

7.6

(GM)*

(SC)g*

(GM)s*

Zone 3

Dcg

Dcg

BOTTOM OF HOLE: T.D. 84.5 ft. (el. 996.4)

W7

W5

W7

H4

H3

H4 moderate hammer blows, scratches with moderate knife blade pressure. Most joints dip 10-20 degrees and 70-80 degrees, spaced 0.1-0.3 feet.

77.1 to 77.4 ft.: Hard (H3), brown, moderately weathered (W5) Copley Greenstone. Dark brown to black oxide coating on vertical joint surfaces. Wedging of hard core length in barrel probably responsible for core loss due to grinding up of intensely weathered rock from

77.4 to 79.5 feet.

81.7 ft.: One quarter-inch wide zone of hard clay and 1/8-1/4-inch hard, angular fragments along joint dipping 70 degrees.

83.1 to 83.3 ft.: Hard (H3), brown, moderately weathered (W5) Copley Greenstone. Probably responsible for core loss due to grinding up of intensely weathered rock from 83.3 to 84.5 feet.

84.0 ft.: One eighth-inch thick brown clay coating on one core fragment.

S P

T B lo w s / f t.

F A

D C

R ec o ve ry

Visual Classification and Physical Condition

S P

T B lo w s / 0

.5 f t.

SPT Data

E le va ti o n fe et

V is u al

C la ss if ic at io n

D ep th fe et

S P

T

R ec o ve ry

S an d

F in es

C o b b le

(3 to

-i n ch

% By Weight

L ab

C la ss if ic at io n

P la st ic it y

In d ex

M o is tu re C o n te n t

G ra ve l

Laboratory Data

L iq u id

L im it

H Q

R…