Prior Nearby Drill Logs_info only.pdf

PDF 625 KB Posted Jul 27, 2022

Attached to: Baumalight SWF580 or Approved Equivalent
Solicitation number: S-63400-00003839
Issued by: Clackamas County, Oregon

About this file

Written by GovTribe AI · Mar 9, 2026

This document contains geotechnical exploration drill logs prepared by Shannon & Wilson, Inc. for the Oregon Department of Transportation (ODOT) in support of the OR 58 Bridge Seismic Retrofit project in Oakridge, Oregon. The file includes detailed subsurface investigation data from multiple boring locations along OR 58 between Mileposts 2.46 and 42.93, specifically for the Coast Fork Willamette River to Upper Salt Creek Bridges area. The drill logs document soil and rock stratigraphy, Standard Penetration Test (SPT) results, soil classification using the Unified Soil Classification System (USCS), and groundwater observations. Drilling activities were conducted in June 2014 and December 2019 using various advancement methods including mud rotary drilling, sonic coring, and hollow stem auger techniques. The boreholes (USB-1, USB-2, USC-1, and USC-2) reached depths ranging from approximately 49 to 69 feet and encountered diverse soil profiles including fill materials, sandy gravel alluvium, silty sand layers, and weathered basalt bedrock at depth.

The subsurface investigation revealed stratified deposits with notable variations across boring locations. Fill materials consisting of asphalt concrete, sandy gravel, and clayey sand occupy the upper 0 to 20 feet at most locations, with evidence of oiled fill and petroleum odor at certain depths. Natural alluvium below fill includes dense to very dense sandy gravel with cobbles and boulders, interspersed with zones of silty sand and silty clay. Groundwater was encountered at varying depths, with drilling fluid loss documented at multiple intervals, suggesting permeable zones and potential cavity conditions in the subsurface. Soil parameters indicate moderate to high plasticity fines in lower zones and nonplastic to low plasticity fines in upper gravel strata. The logs note drilling complications including difficult boulder penetration, drill rod failure, and lost circulation, reflecting challenging subsurface conditions requiring specialized drilling techniques for the planned seismic retrofit work.

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EXPLORATION PLAN – UPPER SALT CREEK

OR 58: Coast Fork Willamette River to Upper Salt

Creek Bridges

OR 58 FROM MILEPOST 2.46 TO 42.93

OAKRIDGE, OREGON

4E 700 NE 55th Avenue Portland, Oregon 97213

PH. (503) 659-3281 FAX. (503) 659-1287

82195050

MAR 6, 2020

KTH

EMH

SDA

KTH

SHOWN / N.T.S.

Project Manager:

Drawn by:

Checked by:

Approved by:

Project No.

Scale:

File Name:

Date:

Figure

XXDIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT

INTENDED FOR CONSTRUCTION PURPOSES

0.00 - 4.00 Sandy GRAVEL with some silt, with cobbles; GP-GM;

Gray and brown;

Nonplastic fines;

Moist; Very dense;

Fine to coarse angular to subrounded gravel;

Fine to coarse sand;

Trace wood debris;

Trace to few cobbles;

(Fill)

4.00 - 9.50 Gravelly CLAY with some sand to Sandy CLAY with some gravel, with cobbles;

CH; Brown, gray and gray-brown; Moist to wet; Stiff to very stiff;

Fine to coarse subangular to subrounded gravel;

Fine to coarse sand;

Trace organics and wood debris;

Disturbed texture;

Trace cobbles; (Fill)

9.50 - 23.00 Sandy GRAVEL with some silt, with cobbles and boulders;

GP-GM/GW-GM;

Brown, red-brown and gray; Low plasticity fines;

Moist; Dense to very dense; Fine to coarse subangular to subrounded gravel;

Fine to coarse sand;

Slight iron-oxidation and staining; Few cobbles; Trace boulders; (Gravel Alluvium 1)

N- 1 (2.50-3.40) Sandy GRAVEL with some silt, with cobbles; GP-GM; Gray and brown; Nonplastic fines;

Moist; Very Dense; Fine to coarse angular to subrounded gravel; Fine to coarse subangular to subrounded sand;

Trace to few cobbles; (Fill)

N- 2 (5.00-6.50) Gravelly CLAY with some sand; CH;

Gray and gray-brown; Medium to high plasticity; Moist to wet; Stiff; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand;

Trace organics and wood debris; (Fill)

N- 3 (7.50-9.00) Sandy CLAY with some gravel, with cobbles; CH; Brown and gray-brown; Medium to high plasticity; Moist to wet; Very Stiff; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand; Disturbed texture; Trace cobbles; (Fill)

N- 4 (10.00-10.20) No recovery; Pounding SPT on cobble or coarse gravel; (Gravel Alluvium 1)

N- 5 (12.50-14.00) Sandy GRAVEL with some silt, with cobbles; GP-GM; Brown and red-brown; Low plasticity fines; Moist to wet; Dense; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand; Slight iron oxidation and staining;

Trace to few cobbles; (Gravel Alluvium 1)

N- 6 (15.00-15.90) Sandy GRAVEL with some silt, with cobbles; GP-GM; Brown and red-brown; Low plasticity fines; Moist to wet; Very Dense; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand; Slight iron oxidation and staining; Trace to few cobbles; (Gravel Alluvium 1)

N- 7 (17.50-17.60) Sandy GRAVEL with some silt, with cobbles and boulders; GP-GM; Brown and gray; Low plasticity fines; Moist; Very Dense; Fine to coarse subrounded gravel; Fine to coarse sand; Few cobbles;

Trace boulders; (Gravel Alluvium 1)

18-50/5"

8-7-6

1-12-7

50/1st 3"

26-20-19

18-50/4"

50/1st 0.5"

Mud rotary drilling technique (5-inch hole)

Boulder from 17.0 to

19.3 feet

Boulder from 19.5 to

20.8 feet

June 9, 2014

Purpose

County

Driller

June 6, 2014

DRILL LOG

OREGON DEPARTMENT OF TRANSPORTATION

Hole No.

E.A. No.

Key No.

Start Card No.

Bridge No.

Ground Elev.

Tube Height55.10 ft

Adrian A.J. Holmes, CEG

Test Type

CME-75 Truck Rig (Hammer Efficiency = 72%)

Start Date End Date

Project

Highway

Hole Location

Lane

SHANNON & WILSON, INC.

Geotechnical and Environmental Consultants

Seismic Retrofit

Hardcore Drilling

Cody K. Sorenson, RG

OR 58 Bridge Seismic Retrofit

Shape Pl - Planar C - Curved U - Undulating St - Stepped Ir - Irregular

"A" - Auger Core "X" - Auger "C" - Core, Barrel Type "N" - Standard Penetration "U" - Undisturbed Sample "T" - Test Pit

Discontinuity J - Joint F - Fault B - Bedding Fo - Foliation S - Shear

Northing:

Page of1

Surface Roughness P - Polished Sl - Slickensided Sm - Smooth R - Rough VR - Very Rough

Drilling Methods WL - Wire Line HS - Hollow Stem Auger DF - Drill Fluid SA - Solid Auger CA - Casing Advancer HA - Hand Auger

Equipment

Project Geologist

Typical Drilling AbbreviationsRock Abbreviations

Easting:

A1Figure

USB-1

B31261

18388

N/A

02071A

N/A

Drilling Remarks LW - Lost Water WR - Water Return WC - Water Color DP - Down Pressure DR - Drill Rate DA - Drill Action

Recorder

Total Depth

"GP" - GeoProbe®

SOIL: Soil Name, USCS, Color, Plasticity, Unit Description

Discontinuity Spacing, Joint Filling, Core Recovery, Formation Name.

Material Description

Moisture, Consistency/Relative Density, Texture, Cementation, Structure, Origin.

ROCK: Rock Name, Color, Weathering, Hardness, G ra ph ic

L og

P er ce nt

N at ur al

M oi st ur e

P er ce nt

R ec ov er y

W at er L ev el

D at e

B ac kf il l/ In st ru m en ta ti on

T es t T yp e, N o.

D ri ll in g M et ho ds , S iz e an d

R em ar ks

Rock

D is co nt in ui ty D at a

O r

R Q

D ep th ft

Soil

D ri vi ng

R es is ta nc e

O D

O T

D R

O D

O T.

O D

O T_

.G D

/2 0/

23.00 - 29.50 Sandy GRAVEL with some silt, with cobbles; GP-GM;

Brown, orange-brown and gray; Low plasticity fines;

Moist; Very Dense;

Fine to coarse subangular to subrounded gravel;

Fine to coarse sand;

Slight iron oxidation and staining; Trace cobbles; (Gravel Alluvium 1)

29.50 - 33.00 Sandy GRAVEL with some silt, with cobbles; GP-GM;

Blue-gray and brown;

Nonplastic fines;

Wet; Medium dense;

Fine to coarse subangular to subrounded gravel;

Fine to coarse sand;

Scattered pockets of gray-blue Silty SAND;

Trace cobbles;

(Gravel Alluvium 1)

33.00 - 39.00 Silty SAND; SM; Gray and blue-gray;

Nonplastic to low plasticity fines; Wet;

Loose; Fine to coarse sand; Stratified with layers of silty fine sand; Trace organics and wood debris;

(Sand Alluvium)

39.00 - 45.00 Sandy silty GRAVEL, with cobbles; GM;

Gray and brown; Low plasticity fines; Moist to wet; Dense to very dense; Fine to coarse subangular to subrounded gravel;

Fine to coarse sand;

Trace cobbles;

(Gravel Alluvium 2)

45.00 - 55.10 Sandy clayey GRAVEL; GC; Brown and gray-brown;

Medium plasticity fines; Moist to wet;

Fine to coarse subangular to subrounded gravel;

Fine to coarse sand;

(Gravel Alluvium 2)

N- 8 (20.80-21.60) Sandy GRAVEL with some silt, with cobbles and boulders; GP-GM; Brown and gray; Low plasticity fines; Wet; Very Dense; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand; Slight iron-oxidation and staining; Few cobbles; Trace boulders; (Gravel Alluvium 1)

N- 9 (25.00-26.50) Sandy GRAVEL with some silt, with cobbles; GP-GM; Brown, orange-brown and gray; Low plasticity fines; Moist; Very Dense; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand; Slight iron-oxidation;

(Gravel Alluvium 1)

N- 10 (30.00-31.50) Sandy GRAVEL with some silt, with cobbles; GP-GM; Blue-gray and brown; Low plasticity fines; Wet; Medium Dense; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand; Scattered pockets of gray-blue sand;

Trace cobbles; (Gravel Alluvium 1)

N- 11 (35.00-36.50) Silty SAND; SM; Gray and blue-gray;

Nonplastic to low plasticity fines; Wet; Loose; Fine to coarse sand; Stratified with layers of silty fine sand; Trace organics and wood debris; (Sand Alluvium)

N- 12 (40.00-41.50) Sandy silty GRAVEL, with cobbles;

GM; Dark gray and dark blue-gray; Low plasticity fines;

Moist; Very Dense; Fine to coarse angular to subrounded gravel; Fine to coarse angular to subrounded sand; Trace cobbles; (Gravel Alluvium 2)

N- 13 (45.00-46.50) Sandy clayey GRAVEL; GC; Brown and gray-brown; Medium plasticity; Moist to wet; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand; (Gravel Alluvium 2)

12-50/4"

35-46-41

12-9-6

3-4-3

24-31-34

14-18-21

Lost about 100 gallons of drilling mud between

19.5 and 25 feet

N10

N11

N12

N13

Project Name OR 58 Bridge Seismic Retrofit Hole No. USB-1 Page of2 3 Figure A1

SOIL: Soil Name, USCS, Color, Plasticity, Unit Description

Discontinuity Spacing, Joint Filling, Core Recovery, Formation Name.

Material Description

Moisture, Consistency/Relative Density, Texture, Cementation, Structure, Origin.

ROCK: Rock Name, Color, Weathering, Hardness, G ra ph ic

L og

P er ce nt

N at ur al

M oi st ur e

P er ce nt

R ec ov er y

W at er L ev el

D at e

B ac kf il l/ In st ru m en ta ti on

T es t T yp e, N o.

D ri ll in g M et ho ds , S iz e an d

R em ar ks

Rock

D is co nt in ui ty D at a

O r

R Q

D ep th ft

Soil

D ri vi ng

R es is ta nc e

O D

O T

D R

O D

O T.

O D

O T_

.G D

50.00 Grades to moderately to strongly cemented

55.10 End of hole

N- 14 (50.00-50.60) Recovered angular fragments of vesicular basalt; Drill action suggests very dense cemented gravel; Varied composition in cuttings; (Gravel Alluvium 2)

N- 15 (55.00-55.10) No recovery; Recovered only drill cuttings: Drill action suggests very dense cemented gravel; Varied composition in cuttings; (Gravel Alluvium 2)

23-50/2"

50/1st 0.5"

N14

N15

Project Name OR 58 Bridge Seismic Retrofit Hole No. USB-1 Page of3 3 Figure A1

SOIL: Soil Name, USCS, Color, Plasticity, Unit Description

Discontinuity Spacing, Joint Filling, Core Recovery, Formation Name.

Material Description

Moisture, Consistency/Relative Density, Texture, Cementation, Structure, Origin.

ROCK: Rock Name, Color, Weathering, Hardness, G ra ph ic

L og

P er ce nt

N at ur al

M oi st ur e

P er ce nt

R ec ov er y

W at er L ev el

D at e

B ac kf il l/ In st ru m en ta ti on

T es t T yp e, N o.

D ri ll in g M et ho ds , S iz e an d

R em ar ks

Rock

D is co nt in ui ty D at a

O r

R Q

D ep th ft

Soil

D ri vi ng

R es is ta nc e

O D

O T

D R

O D

O T.

O D

O T_

.G D

0.00 - 0.60 Asphalt Concrete;

(Fill)

0.60 - 6.00 Sandy GRAVEL with some silt; GP-GM;

Brown to dark brown;

Nonplastic fines;

Moist; Very dense;

Fine to coarse angular to subrounded gravel;

Fine to coarse sand;

Homogeneous; (Fill)

6.00 - 9.50 Sandy clayey GRAVEL; GC; Black to dark brown;

Medium to high plasticity fines;

Moist; Medium dense; Fine to coarse angular to subrounded gravel;

Fine to coarse sand;

Petroleum odor;

Oiled fill; (Fill)

9.50 - 12.00 Gravelly CLAY with some sand; CH;

Brown and orange-brown;

Medium to high plasticity fines;

Moist; Stiff; Fine to coarse angular to subrounded gravel;

Fine to coarse sand;

Trace organic debris;

Slight to moderate iron oxidation and staining; Disturbed texture; (Fill)

12.00 - 17.00 Sandy CLAY with some gravel; CH;

Brown, tan-brown and red-brown; High

N- 1 (2.50-3.60) Sandy GRAVEL with some silt; GP-GM;

Brown; Nonplastic fines; Moist; Very Dense; Fine to coarse angular to subrounded gravel; Fine to coarse subangular to subrounded sand; Homogeneous; (Fill)

N- 2 (5.00-6.50) Sandy GRAVEL with some silt; GP-GM;

Dark brown and black; Nonplastic fines; Moist; Very Dense; Fine to coarse angular to subrounded gravel; Fine to coarse subangular to subrounded sand; Oiled fill at 6.0 feet; Strong petroleum odor; (Fill)

N- 3 (7.50-9.00) Sandy clayey GRAVEL; GC; Dark brown; Medium to high plasticity fines; Moist; Medium Dense; Fine to coarse angular to subrounded gravel; Fine to coarse angular to subangular sand; Slight petroleum odor; (Fill)

N- 4 (10.00-11.50) Gravelly CLAY with some sand; CH;

Brown and orange-brown; Medium to high plasticity fines;

Moist; Stiff; Fine to coarse angular to subrounded gravel;

Fine to coarse angular to subrounded sand; Slight to moderate iron oxidation; Disturbed texture; Trace organics; (Fill)

N- 5 (12.50-14.00) No recovery; CLAY; CH; Based on drill action and cuttings; (Fill)

N- 6 (15.00-16.50) Sandy CLAY with some gravel; CH;

Tan-brown and red-brown; High plasticity; Moist to wet;

Medium Stiff; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand;

Disturbed texture; (Fill)

N- 7 (17.50-19.00) Sandy GRAVEL with some silt;

GP-GM; Brown; Low plasticity fines; Moist; Medium Dense; Fine to coarse subangular to subrounded gravel;

Fine to coarse subangular to subrounded sand; (Gravel Alluvium 1)

32-38-50/2"

22-42-49

5-9-14

7-5-4

3-3-3

2-3-2

5-9-14

Mud rotary drilling technique (5-inch hole)

Lost about 50 gallons of drilling mud at 4.5 feet

Lost about 55 gallons of drilling mud at 8 feet

Lost about 110 gallons of drilling mud between 17 and 20 feet

June 5, 2014

Purpose

County

Driller

June 5, 2014

DRILL LOG

OREGON DEPARTMENT OF TRANSPORTATION

Hole No.

E.A. No.

Key No.

Start Card No.

Bridge No.

Ground Elev.

Tube Height49.20 ft

Adrian A.J. Holmes, CEG

Test Type

CME-75 Truck Rig (Hammer Efficiency = 72%)

Start Date End Date

Project

Highway

Hole Location

Lane

SHANNON & WILSON, INC.

Geotechnical and Environmental Consultants

Seismic Retrofit

Hardcore Drilling

Cody K. Sorenson, RG

OR 58 Bridge Seismic Retrofit

Shape Pl - Planar C - Curved U - Undulating St - Stepped Ir - Irregular

"A" - Auger Core "X" - Auger "C" - Core, Barrel Type "N" - Standard Penetration "U" - Undisturbed Sample "T" - Test Pit

Discontinuity J - Joint F - Fault B - Bedding Fo - Foliation S - Shear

Northing:

Page of1

Surface Roughness P - Polished Sl - Slickensided Sm - Smooth R - Rough VR - Very Rough

Drilling Methods WL - Wire Line HS - Hollow Stem Auger DF - Drill Fluid SA - Solid Auger CA - Casing Advancer HA - Hand Auger

Equipment

Project Geologist

Typical Drilling AbbreviationsRock Abbreviations

Easting:

A2Figure

USB-2

B31261

18388

N/A

02071A

N/A

Drilling Remarks LW - Lost Water WR - Water Return WC - Water Color DP - Down Pressure DR - Drill Rate DA - Drill Action

Recorder

Total Depth

"GP" - GeoProbe®

SOIL: Soil Name, USCS, Color, Plasticity, Unit Description

Discontinuity Spacing, Joint Filling, Core Recovery, Formation Name.

Material Description

Moisture, Consistency/Relative Density, Texture, Cementation, Structure, Origin.

ROCK: Rock Name, Color, Weathering, Hardness, G ra ph ic

L og

P er ce nt

N at ur al

M oi st ur e

P er ce nt

R ec ov er y

W at er L ev el

D at e

B ac kf il l/ In st ru m en ta ti on

T es t T yp e, N o.

D ri ll in g M et ho ds , S iz e an d

R em ar ks

Rock

D is co nt in ui ty D at a

O r

R Q

D ep th ft

Soil

D ri vi ng

R es is ta nc e

O D

O T

D R

O D

O T.

O D

O T_

.G D

/2 plasticity; Moist to wet; Medium stiff;

Fine to coarse subrounded gravel;

Fine to coarse sand;

Disturbed texture;

(Fill)

17.00 - 25.00 Sandy GRAVEL with some silt grading to GRAVEL with some sand, with cobbles;

GP-GM, GP; Brown and gray; Low plasticity fines;

Moist; Medium dense to very dense; Fine to coarse subangular to subrounded gravel;

Fine to coarse sand;

Few cobbles; (Gravel Alluvium 1)

25.00 - 28.00 Silty SAND with trace gravel; SM;

Orange-brown;

Nonplastic fines;

Wet; Very loose;

Trace subrounded gravel; Fine to medium sand; Slight iron oxidation and staining; (Sand Alluvium)

28.00 - 39.00 Sandy GRAVEL with some silt, with cobbles and boulders; GP-GM;

Brown, red-brown and gray; Low to medium plasticity fines; Moist to wet;

Medium dense to very dense; Fine to coarse subangular to subrounded gravel;

Fine to coarse sand;

Slight iron oxidation and staining; Few cobbles; Trace boulders; (Gravel Alluvium 1)

39.00 - 49.20 Sandy clayey GRAVEL, with cobbles; GC; Dark gray and blue-gray;

Medium to high plasticity fines; Wet;

Dense to very dense;

Fine to coarse angular to subrounded gravel;

Fine to coarse sand;

Trace cobbles;

(Gravel Alluvium 2) 45.00 Trace fine organic debris 47.00 Grades to higher coarse gravel content 49.20

N- 8 (20.00-20.10) No recovery; Gravel and cobbles, based on drill action; (Gravel Alluvium 1)

N- 9 (25.00-26.50) Silty SAND with trace gravel; SM;

Orange-brown; Nonplastic fines; Wet; Very Loose; Trace subrounded gravel; Fine to medium sand; Slight iron oxidation and staining; (Sand Alluvium)

N- 10 (30.00-31.50) Sandy GRAVEL with some silt;

GP-GM; Red-brown; Low to medium plasticity fines;

Moist to wet; Medium Dense; Fine to coarse subangular to subrounded gravel; Fine to coarse subangular to subrounded sand; Slight iron oxidation; (Gravel Alluvium 1)

N- 11 (35.20-36.00) Sandy GRAVEL with some silt, with cobbles and boulders; GP-GM; Brown and gray and red-gray; Low to medium plasticity fines; Wet; Very Dense; Fine to coarse subrounded gravel; Fine to coarse subangular to subrounded sand; Few cobbles; Trace boulders; (Gravel Alluvium 1)

N- 12 (40.00-41.50) Sandy clayey GRAVEL; GC; Dark gray and blue-gray; High plasticity fines; Moist to wet;

Very Dense; Fine to coarse angular to subrounded gravel; Fine to coarse angular to subrounded sand;

(Gravel Alluvium 2)

N- 13 (45.00-46.50) Sandy clayey GRAVEL, with cobbles; GC; Dark gray and blue-gray; High plasticity fines; Wet; Dense; Fine to coarse angular to subrounded gravel; Fine to coarse angular to subrounded sand; Trace fine organic debris; Trace cobbles; (Gravel Alluvium 2)

50/1st 1"

0-0-2

9-9-8

19-50/3"

19-16-42

16-20-19

Lost about 200 gallons of drilling mud between 20 and 25 feet; no circulation

Boulder from 33.0 to

35.2 feet

Regained circulation at 47 feet

Drill rods broke near bit at 49.2 feet; hole abandoned with tri-cone bit in bottom Cobble or small boulder at 49 feet

N10

N11

N12

N13

Project Name OR 58 Bridge Seismic Retrofit Hole No. USB-2 Page of2 3 Figure A2

SOIL: Soil Name, USCS, Color, Plasticity, Unit Description

Discontinuity Spacing, Joint Filling, Core Recovery, Formation Name.

Material Description

Moisture, Consistency/Relative Density, Texture, Cementation, Structure, Origin.

ROCK: Rock Name, Color, Weathering, Hardness, G ra ph ic

L og

P er ce nt

N at ur al

M oi st ur e

P er ce nt

R ec ov er y

W at er L ev el

D at e

B ac kf il l/ In st ru m en ta ti on

T es t T yp e, N o.

D ri ll in g M et ho ds , S iz e an d

R em ar ks

Rock

D is co nt in ui ty D at a

O r

R Q

D ep th ft

Soil

D ri vi ng

R es is ta nc e

O D

O T

D R

O D

O T.

O D

O T_

.G D

End of hole

Project Name OR 58 Bridge Seismic Retrofit Hole No. USB-2 Page of3 3 Figure A2

SOIL: Soil Name, USCS, Color, Plasticity, Unit Description

Discontinuity Spacing, Joint Filling, Core Recovery, Formation Name.

Material Description

Moisture, Consistency/Relative Density, Texture, Cementation, Structure, Origin.

ROCK: Rock Name, Color, Weathering, Hardness, G ra ph ic

L og

P er ce nt

N at ur al

M oi st ur e

P er ce nt

R ec ov er y

W at er L ev el

D at e

B ac kf il l/ In st ru m en ta ti on

T es t T yp e, N o.

D ri ll in g M et ho ds , S iz e an d

R em ar ks

Rock

D is co nt in ui ty D at a

O r

R Q

D ep th ft

Soil

D ri vi ng

R es is ta nc e

O D

O T

D R

O D

O T.

O D

O T_

.G D

6-24-15 N=39

12-21-16 N=37

16-13-20 N=33

50-21-22 N=43

50/1"

8-22-13 N=35

9-41-17 N=58

50/2"

19-30-50/2"

32-25-22 N=47

26-28-28 N=56

TOPSOIL

POORLY GRADED GRAVEL WITH SILT (GP-GM), trace cobbles, angular, gray, dense

POORLY GRADED GRAVEL WITH SAND (GP), trace cobbles, gray, brown, tan, dense to very dense rounded

SILTY GRAVEL WITH SAND (GP-GM), trace cobbles, rounded, brown, very dense

POORLY GRADED GRAVEL WITH SAND (GP), trace cobbles, rounded, red to brown, dense to very dense

0.3

10.0

20.0

30.0

1735.5+/-

1726+/-

1716+/-

1706+/-

Hammer Type: AutomaticStratification lines are approximate. In-situ, the transition may be gradual.

B O

G L

O G

O T

R O

M O

O R

G -N

O W

T C

N _D

G D

/1 1/

N S

(F t.)

D T

O N

ATTERBERG

LIMITS

LL-PL-PI

LOCATION See Exploration Plan

Latitude: 43.7189° Longitude: -122.3312°

G R

O G

M O

DEPTH ELEVATION (Ft.)

Approximate Surface Elev.: 1736 (Ft.) +/-

Advancement Method:

Sonic coring

Abandonment Method:

Boring backfilled with bentonite grout upon completion

Notes:

Project No.: 82195050

Drill Rig: 150cc

BORING LOG NO. USC-1

DJ&A PCCLIENT:

Missoula, MT

Driller: Andy Flagan

Boring Completed: 12-16-2019

PROJECT: OR 58: Coast Fork Willamette River to Upper Salt Creek Bridges

See Exploration and Testing Procedures for a description of field and laboratory procedures used and additional data (If any).

See Supporting Information for explanation of symbols and abbreviations.

Upper Salt Creek Bridge East of Oakridge, OR

SITE:

Boring Started: 12-15-2019

700 NE 55th Ave Portland, OR

While drilling

At completion of drilling

WATER LEVEL OBSERVATIONS

20-50/5"

9-17-50/1"

50/1"

12-50/5"

50/2"

50/1"

32-21-11

POORLY GRADED GRAVEL WITH SAND (GP), trace cobbles, rounded, red to brown, dense to very dense (continued)

SILTY GRAVEL WITH SAND (GM), trace cobbles, brown, very dense

SANDY LEAN CLAY WITH GRAVEL (CL), medium plasticity, yellow brown, very stiff

CLAYEY GRAVEL WITH SAND (GC), trace cobbles, dark olive brown, very dense, probable weathered to completely weathered bedrock

WEATHERED BASALT, olive, slightly weathered, medium strong to strong olive to gray, some crystal formation

Boring Refusal at 69 Feet

42.0

45.5

50.0

54.0

69.0

1694+/-

1690.5+/-

1686+/-

1682+/-

1667+/-

Hammer Type: AutomaticStratification lines are approximate. In-situ, the transition may be gradual.

B O

G L

O G

O T

R O

M O

O R

G -N

O W

T C

N _D

G D

/1 1/

N S

(F t.)

D T

O N

ATTERBERG

LIMITS

LL-PL-PI

LOCATION See Exploration Plan

Latitude: 43.7189° Longitude: -122.3312°

G R

O G

M O

DEPTH ELEVATION (Ft.)

Approximate Surface Elev.: 1736 (Ft.) +/-

Advancement Method:

Sonic coring

Abandonment Method:

Boring backfilled with bentonite grout upon completion

Notes:

Project No.: 82195050

Drill Rig: 150cc

BORING LOG NO. USC-1

DJ&A PCCLIENT:

Missoula, MT

Driller: Andy Flagan

Boring Completed: 12-16-2019

PROJECT: OR 58: Coast Fork Willamette River to Upper Salt Creek Bridges

See Exploration and Testing Procedures for a description of field and laboratory procedures used and additional data (If any).

See Supporting Information for explanation of symbols and abbreviations.

Upper Salt Creek Bridge East of Oakridge, OR

SITE:

Boring Started: 12-15-2019

700 NE 55th Ave Portland, OR

While drilling

At completion of drilling

WATER LEVEL OBSERVATIONS

7-15-20 N*=28

13-13-13 N*=21

7-10-17 N*=21

4-6-10 N*=13

6-9-11 N*=16

7-18-18 N*=28

7-14-18 N*=25

9-22-24 N*=36

8-8-10 N*=14

5-8-10 N*=14

49-26-23

ASPHALT

FILL - SANDY GRAVEL , angular, brown, medium dense

FILL - POORLY GRADED GRAVEL WITH SAND (GP), angular, brown, white, orange, medium dense brown, medium dense

FILL - CLAYEY SAND WITH GRAVEL (SC), low to medium plasticity, brown, medium dense brownish red to gray

POORLY GRADED GRAVEL WITH CLAY (GP-GC), trace sand, subangular, gray, medium dense

SILTY SAND WITH GRAVEL (SM), fine to coarse grained, subangular, gray, loose to medium dense sandy, fine grained, subangular, brown, loose loose, possible cobble/boulder

0.3

3.0

7.5

15.0

26.3

1759+/-

1756+/-

1751.5+/-

1744+/-

1733+/-

Sample disturbance due to gravel Significant drill chatter working through boulder

Hammer Type: AutomaticStratification lines are approximate. In-situ, the transition may be gradual.

B O

G L

O G

O T

R O

M O

O R

G -N

O W

T C

N _D

G D

/1 1/

N S

(F t.)

D T

O N

ATTERBERG

LIMITS

LL-PL-PI

LOCATION See Exploration Plan

Latitude: 43.7185° Longitude: -122.3304°

G R

O G

M O

DEPTH ELEVATION (Ft.)

Approximate Surface Elev.: 1759 (Ft.) +/-

Advancement Method:

Air rotary and Hollow stem auger

Abandonment Method:

Boring backfilled with bentonite grout upon completion

Notes:

Project No.: 82195050

Drill Rig: D-90

BORING LOG NO. USC-2

DJ&A PCCLIENT:

Missoula, MT

Driller: Chad Nix

Boring Completed: 12-14-2019

PROJECT: OR 58: Coast Fork Willamette River to Upper Salt Creek Bridges

See Exploration and Testing Procedures for a description of field and laboratory procedures used and additional data (If any).

See Supporting Information for explanation of symbols and abbreviations.

Upper Salt Creek Bridge East of Oakridge, OR

SITE:

Boring Started: 12-12-2019

700 NE 55th Ave Portland, OR

While drilling

WATER LEVEL OBSERVATIONS

10-9-11 N*=16

65/5" N*=100

30-40-35 N*=59

8-32-50/4"

82 (HP)

29-42-50/2"

92 (HP)

12-22-34 N=56

56 (HP)

SILTY SAND WITH GRAVEL (SM), fine to coarse grained, subangular, gray, loose to medium dense (continued)

CLAYEY GRAVEL (GC), subangular, bluish gray, dense, gravel consists of fractured/angular pieces, brittle

POORLY GRADED SAND WITH CLAY (SP), fine grained, gray, dense POORLY GRADED GRAVEL WITH SAND (GP), angular, gray, very dense, -possible weathered rock sandy, medium grained, angular, gray, very dense, -possible weathered rock

Boring Terminated at 66.2 Feet

43.0

55.5

66.2

1716+/-

1703.5+/-

1693+/-

Sample disturbance due to gravel

Hammer Type: AutomaticStratification lines are approximate. In-situ, the transition may be gradual.

B O

G L

O G

O T

R O

M O

O R

G -N

O W

T C

N _D

G D

/1 1/

N S

(F t.)

D T

O N

ATTERBERG

LIMITS

LL-PL-PI

LOCATION See Exploration Plan

Latitude: 43.7185° Longitude: -122.3304°

G R

O G

M O

DEPTH ELEVATION (Ft.)

Approximate Surface Elev.: 1759 (Ft.) +/-

Advancement Method:

Air rotary and Hollow stem auger

Abandonment Method:

Boring backfilled with bentonite grout upon completion

Notes:

Project No.: 82195050

Drill Rig: D-90

BORING LOG NO. USC-2

DJ&A PCCLIENT:

Missoula, MT

Driller: Chad Nix

Boring Completed: 12-14-2019

PROJECT: OR 58: Coast Fork Willamette River to Upper Salt Creek Bridges

See Exploration and Testing Procedures for a description of field and laboratory procedures used and additional data (If any).

See Supporting Information for explanation of symbols and abbreviations.

Upper Salt Creek Bridge East of Oakridge, OR

SITE:

Boring Started: 12-12-2019

700 NE 55th Ave Portland, OR

While drilling

WATER LEVEL OBSERVATIONS

File details come from the government source that posted it. Updated Mar 9, 2026.