Attachment 009 4223117-NMSU Wooten Hall Improvements Geotech Report.pdf

COZ Engineering, LLC

GEOTECHNICAL ENGINEERING REPORT

NMSU WOOTEN HALL IMPROVEMENTS

LAS CRUCES, NEW MEXICO

Project No. 4223117 October 9, 2023

Prepared for:

THE JOHNSON-MCADAMS FIRM PA

Greenwood, Mississippi

Prepared by:

COZ ENGINEERING, LLC

Las Cruces, New Mexico

NMSU Wooten Hall Improvements

COZ Report No. 4223117

Site Investigation: 1

Site Conditions: 1

Planned Construction: 2

Helical Piers: 2

Seismic Site Classification: 3

Report Limitations: 4

Appendix:

Site Plan Boring Log Laboratory Results

Site Investigation:

A subsurface investigation was performed for the proposed improvements to Wooten Hall located on the campus of New Mexico State University (NMSU) in Las Cruces, New

Mexico. Four (4) test borings were advanced near the existing colonnades along the west and south sides of the structure. The borings were terminated at a depth of 26.5 feet below ground surface (bgs). The test boring log and location plan are provided in the appendix of this report.

Site Conditions:

Based on the results of the borings, subsurface conditions on the project site can be generalized as follows:

Borings B-1 and B-2 (along the south side of structure)

Description Approximate Depth to

Bottom of Stratum (feet) Material

Encountered Consistency/Density

Stratum 1 10 Sandy Lean Clay Medium Stiff

Stratum 2 20 Poorly Graded

Sand Loose to Medium

Dense

Stratum 3 25 Sandy Lean Clay Medium Stiff to Stiff

Stratum 4* 26.5 Poorly Graded

Gravel with Silt and Sand

Medium Dense

*strata not encountered in Boring B-2

Borings B-3 and B-4 (along the west side of structure)

Description Approximate Depth to Bottom of Stratum (feet)

Material Encountered

Consistency/Density

Stratum 1 10 Sandy Lean Clay Stiff

Stratum 2 25 Poorly Graded Sand

Medium Dense

Stratum 3 26.5 Poorly Graded

Gravel with Sand Medium Dense to

Dense

The borings were observed while drilling and after completion for the presence and level of groundwater. Groundwater was not observed in the borings while drilling, or for the short duration that the borings were allowed to remain open.

Planned Construction:

Based on the information provided, I understand the project will include the implementation of additional structural support to the colonnades along the west and south sides of Wooten Hall. Helical piers are the planned method of support. Structural loading has been estimated as 25 kips for maximum column loads.

Helical Piers:

Helical piers could be used for support of the colonnades. Pier capacities are related to the torque used to screw the pier into the ground. Foundation design is based on calculated capacities utilizing soil strength criteria.

Ultimate axial capacity of each helical pier in compression can be determined by the following equation:

Qu = qNqAp

Qu = ultimate axial capacity in compression (lb) q = In-situ stress at depth of helix (lb/ft2) = unit weight x dq

Nq = Bearing Factor

Ap = gross area of the helices on the pier (ft2) dq = depth of helix below the ground surface (ft)

Engineering properties based upon the borings have been estimated for the soil conditions as follows:

Borings B-1 and B-2 (south side of structure)

*strata not encountered in Boring B-2

Borings B-3 and B-4 (west side of structure)

Seismic Site Classification:

The seismic site classification is based upon the soil profile in the upper 100 feet as defined by the weighted average of standard penetration blow-counts or shear wave velocity in accordance with Section 20.4 of the ASCE 7 and the International Building Code (IBC).

Based upon the field investigation, it is my opinion that the Seismic Site Classification is D

(“Stiff Soil”). The maximum depth of the borings advanced at the site was 25 feet.

Therefore, soil properties below the maximum boring depth to 100 feet were estimated based on my experience with the general area. Deeper borings or geophysical testing would be required to confirm the conditions below the current boring depth.

Approximate Depth Below Ground Surface (feet)

Unit Weight (pcf) Nq

0 to 10 105 1

10 to 20 115 25.3

20 to 25 110 1

>25* 115 28.5

Approximate Depth Below Ground Surface (feet)

Unit Weight (pcf) Nq

0 to 10 105 1

10 to 25 115 25.3

>25 120 36.5

Report Limitations:

The conclusions, recommendations and opinions presented herein are:

1) Based upon evaluation and interpretation of the findings of the field and laboratory program.

2) Based upon an interpolation of soil conditions between and beyond the explorations.

3) Subject to confirmation of the conditions encountered during construction.

4) Based upon the assumption that sufficient observation and testing will be provided during construction.

There is no other warranty, either express or implied. Any person using this report for bidding or construction purposes should perform such independent investigation as he deems necessary to satisfy himself as to the surface and subsurface conditions to be encountered and the procedures to be used in the performance of work on this project. If conditions are encountered during construction that appear to differ from those indicated in this report, I should be notified immediately.

BORING LOCATION PLAN

Las Cruces, NM

PO Box 13331

Las Cruces, NM 88013

4223117

DC

B-2 B-1

N

DC COZ Engineering, LLC

DC

DC

AS SHOWN

Figures

10-4-23

Scale:

Exhibit Project Manager:

Drawn by:

Checked by:

Approved by:

Project No.

File Name:

Date:

Approximate Boring Location

B-4

B-3

Project: NMSU Wooten Hall Improvements

Project Location: Las Cruces, NM

Project Number: 4223117

Log of Boring B-1

Date(s) Drilled 9-21-23

Drilling Method hollow-stem auger

Drill Rig Type CME-75

Groundwater Level and Date Measured not encountered

Borehole Backfill cuttings and patch

Logged By COZ

Drill Bit Size/Type

Drilling Contractor Southlands

Sampling Method(s) SPT

Location see boring plan

Checked By COZ

Total Depth of Borehole 26.5 feet bgs

Approximate Surface Elevation

Hammer Data

M at er ia l T yp e

CL

SP

CL

GP-GM

LL

P I, NP

P er ce nt

F in es

58.6

10.9

G ra ph ic

L og

W at er C on te nt

14.1

3.6

MATERIAL DESCRIPTION

SANDY LEAN CLAY: brown, moist, medium stiff

POORLY GRADED SAND: light brown, dry, loose medium dense

SANDY LEAN CLAY: brown, moist, stiff

POORLY GRADED GRAVEL WITH SILT AND

SAND: light brown to grey, dry, medium dense

Bottom of Boring

D ep th fe et

S am pl e

N um be r

S am pl e

T yp e

S am pl in g R es is ta nc e, bl ow s/ ft

3\2\3

4\3\5

6\8\16

5\4\6

3\6\9

E le va tio n (f ee t)

C :\U se rs

\th ec o\ A pp D at a\

Lo ca l\T em p\ bo rin gs

_t em p\ tm pf ile

.b gs

[C O

Z E ng in ee rin g 1.

tp l]

Sheet 1 of 1

Project Number: 4223117

Log of Boring B-2

Date(s) Drilled 9-21-23

Drilling Method hollow-stem auger

Drill Rig Type CME-75

Groundwater Level and Date Measured not encountered

Borehole Backfill cuttings and patch

Logged By COZ

Drill Bit Size/Type

Drilling Contractor Southlands

Sampling Method(s) SPT

Location see boring plan

Checked By COZ

Total Depth of Borehole 26.5 feet bgs

Approximate Surface Elevation

Hammer Data

M at er ia l T yp e

CL

SP

CL

LL

P I, P er ce nt

F in es

77.7

68.6

G ra ph ic

L og

W at er C on te nt

12.9

26.9

MATERIAL DESCRIPTION

LEAN CLAY WITH SAND: brown, moist, stiff

POORLY GRADED SAND: light brown, dry, medium dense trace gravel

SANDY LEAN CLAY: brown, moist, stiff medium stiff

Bottom of Boring

D ep th fe et

S am pl e

N um be r

S am pl e

T yp e

S am pl in g R es is ta s/ ft

5\5\6

6\5\6

5\7\3

3\5\6

3\3\4

E le va tio n (f ee t)

C :\U se rs

\th ec o\ A pp D at a\

Lo ca l\T em p\ bo rin gs

_t em p\ tm pf ile

.b gs

[C O

Z E ng in ee rin g 1.

tp

Project Number: 4223117

Log of Boring B-3

Date(s) Drilled 9-21-23

Drilling Method hollow-stem auger

Drill Rig Type CME-75

Groundwater Level and Date Measured not encountered

Borehole Backfill cuttings and patch

Logged By COZ

Drill Bit Size/Type

Drilling Contractor Southlands

Sampling Method(s) SPT

Location see boring plan

Checked By COZ

Total Depth of Borehole 26.5 feet bgs

Approximate Surface Elevation

Hammer Data

M at er ia l T yp e

CL

SP

GP

LL

P I, NP

P er ce nt

F in es

3.2

G ra ph ic

L og

W at er C on te nt

2.2

MATERIAL DESCRIPTION

SANDY LEAN CLAY: brown, moist, stiff

POORLY GRADED SAND: light brown, dry, medium dense

POORLY GRADED GRAVEL WITH SAND:

light brown to grey, dry, dense

Bottom of Boring

D ep th fe et

S am pl e

N um be r

S am pl e

T yp e

S am pl in g R es is ta s/ ft

5\5\6

5\6\7

5\5\7

4\6\6

12\18\26

E le va tio n (f ee t)

C :\U se rs

\th ec o\ A pp D at a\

Lo ca l\T em p\ bo rin gs

_t em p\ tm pf ile

.b gs

[C O

Z E ng in ee rin g 1.

tp

Project Number: 4223117

Log of Boring B-4

Date(s) Drilled 9-21-23

Drilling Method hollow-stem auger

Drill Rig Type CME-75

Groundwater Level and Date Measured not encountered

Borehole Backfill cuttings and patch

Logged By COZ

Drill Bit Size/Type

Drilling Contractor Southlands

Sampling Method(s) SPT

Location see boring plan

Checked By COZ

Total Depth of Borehole 26.5 feet bgs

Approximate Surface Elevation

Hammer Data

M at er ia l T yp e

CL

SP

GP

LL

P I, P er ce nt

F in es

G ra ph ic

L og

W at er C on te nt

MATERIAL DESCRIPTION

SANDY LEAN CLAY: brown, moist, stiff

POORLY GRADED SAND: light brown, dry, medium dense

POORLY GRADED GRAVEL WITH SAND:

light brown to grey, dry, medium dense

Bottom of Boring

D ep th fe et

S am pl e

N um be r

S am pl e

T yp e

S am pl in g R es is ta s/ ft

5\5\9

3\5\5

5\6\6

5\4\6

10\12\14

E le va tio n (f ee t)

C :\U se rs

\th ec o\ A pp D at a\

Lo ca l\T em p\ bo rin gs

_t em p\ tm pf ile

.b gs

[C O

Z E ng in ee rin g 1.

tp

Project Number: 4223117

Key to Log of Boring

M at er ia l T yp e

LL

P I, P er ce nt

F in es

G ra ph ic

L og

W at er C on te nt

MATERIAL DESCRIPTIOND

ep th fe et

S am pl e

N um be r

S am pl e

T yp e

S am pl in g R es is ta s/ ft

E le va tio n (f ee t)

1 2 3 4 5 6 7 8 9 10 11 12

COLUMN DESCRIPTIONS

1 Elevation (feet): Elevation (MSL, feet).

2 Depth (feet): Depth in feet below the ground surface.

3 Sample Type: Type of soil sample collected at the depth interval shown.

4 Sample Number: Sample identification number.

5 Sampling Resistance, blows/ft: Number of blows to advance driven sampler one foot (or distance shown) beyond seating interval using the hammer identified on the boring log.

6 Material Type: Type of material encountered.

7 Graphic Log: Graphic depiction of the subsurface material encountered.

8 MATERIAL DESCRIPTION: Description of material encountered.

May include consistency, moisture, color, and other descriptive text.

9 Water Content, %: Water content of the soil sample, expressed as percentage of dry weight of sample.

10 Percent Fines: The percent fines (soil passing the No. 200 Sieve) in the sample. WA indicates a Wash Sieve, SA indicates a Sieve Analysis.

11 LL, %: Liquid Limit, expressed as a water content.

12 PI, %: Plasticity Index, expressed as a water content.

FIELD AND LABORATORY TEST ABBREVIATIONS

CHEM: Chemical tests to assess corrosivity COMP: Compaction test CONS: One-dimensional consolidation test LL: Liquid Limit, percent

PI: Plasticity Index, percent SA: Sieve analysis (percent passing No. 200 Sieve) UC: Unconfined compressive strength test, Qu, in ksf WA: Wash sieve (percent passing No. 200 Sieve)

MATERIAL GRAPHIC SYMBOLS

Lean CLAY, CLAY w/SAND, SANDY CLAY (CL)

Poorly graded GRAVEL (GP)

Poorly graded GRAVEL with Silt (GP-GM)

Poorly graded SAND (SP)

TYPICAL SAMPLER GRAPHIC SYMBOLS

Auger sampler

Bulk Sample

3-inch-OD California w/ brass rings

CME Sampler

Grab Sample

2.5-inch-OD Modified California w/ brass liners

Pitcher Sample

2-inch-OD unlined split spoon (SPT)

Shelby Tube (Thin-walled, fixed head)

OTHER GRAPHIC SYMBOLS

Water level (at time of drilling, ATD)

Water level (after waiting)

Minor change in material properties within a stratum

Inferred/gradational contact between strata

? Queried contact between strata

GENERAL NOTES

1: Soil classifications are based on the Unified Soil Classification System. Descriptions and stratum lines are interpretive, and actual lithologic changes may be gradual. Field descriptions may have been modified to reflect results of lab tests.

2: Descriptions on these logs apply only at the specific boring locations and at the time the borings were advanced. They are not warranted to be representative of subsurface conditions at other locations or times.

C :\U se rs

\th ec o\ A pp D at a\

Lo ca l\T em p\ bo rin gs

_t em p\ tm pf ile

.b gs

[C O

Z E ng in ee rin g 1.

tp l]

Figure B-1

Sieve Size 1 1/2" 3/4" 3/8" #4 #10 #40 #100 #200

% Passing (Cumulative) 100% 100% 98% 97% 97% 95% 77% 58.6%

Specification

% GRAVEL = 3% D85 = 0.2 D15 =

% SAND = 39% D60 = 0.1 D10 =

% SILT & CLAY = 59% D50 = CU =

D30 = CC =

Sample Date: 9/21/23

Project No.: 4223117

Project Name: NMSU Wooten Hall Improvements

Report Date: 10/4/23

Sample Location: B-1 at 20'

Liquid Limit: 27 9 USCS Classification: CL

Material Description: Sandy Lean Clay In-Situ Moisture Content: 14.1%

TEST SUMMARY (ASTM C136)

(575) 642-7671

COZ Engineering, LLC

PO Box 13331

Las Cruces, NM 88013

Plasticity Index:

GRAIN SIZE - mm

GRAIN SIZE DISTRIBUTION GRAPH

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.0010.010.11101001000

P E

R C

E N

T F

IN

E

R in

1.

#4

#2

% Passing (Cumulative) 100% 100% 74% 54% 44% 38% 17% 10.9%

Specification

% GRAVEL = 46% D85 = 11.5 D15 = 0.1

% SAND = 43% D60 = 5.8 D10 =

% SILT & CLAY = 11% D50 = 3.3 CU =

D30 = 0.2 CC =

Sample Date: 9/21/23

Project No.: 4223117

Project Name: NMSU Wooten Hall Improvements

Report Date: 10/4/23

Sample Location: B-1 at 25'

Liquid Limit: NP USCS Classification: GP-GM

Material Description: Poorly Graded Gravel with Silt and Sand In-Situ Moisture Content: 3.6%

TEST SUMMARY (ASTM C136)

(575) 642-7671

COZ Engineering, LLC

PO Box 13331

Las Cruces, NM 88013

Plasticity Index:

GRAIN SIZE - mm

GRAIN SIZE DISTRIBUTION GRAPH

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.0010.010.11101001000

P E

R C

E N

T F

IN

% Passing (Cumulative) 100% 100% 100% 100% 99% 97% 88% 77.7%

Specification

% GRAVEL = 0% D85 = 0.1 D15 =

% SAND = 22% D60 = D10 =

% SILT & CLAY = 78% D50 = CU =

D30 = CC =

Sample Date: 9/21/23

Project No.: 4223117

Project Name: NMSU Wooten Hall Improvements

Report Date: 10/4/23

Sample Location: B-2 at 5'

Liquid Limit: 33 13 USCS Classification: CL

Material Description: Lean Clay with Sand In-Situ Moisture Content: 12.9%

TEST SUMMARY (ASTM C136)

(575) 642-7671

COZ Engineering, LLC

PO Box 13331

Las Cruces, NM 88013

Plasticity Index:

GRAIN SIZE - mm

GRAIN SIZE DISTRIBUTION GRAPH

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.0010.010.11101001000

P E

R C

E N

T F

IN

% Passing (Cumulative) 100% 100% 100% 97% 91% 81% 71% 68.6%

Specification

% GRAVEL = 3% D85 = 0.5 D15 =

% SAND = 29% D60 = D10 =

% SILT & CLAY = 69% D50 = CU =

D30 = CC =

Sample Date: 9/21/23

Project No.: 4223117

Project Name: NMSU Wooten Hall Improvements

Report Date: 10/4/23

Sample Location: B-2 at 25'

Liquid Limit: 43 21 USCS Classification: CL

Material Description: Sandy Lean Clay In-Situ Moisture Content: 26.9%

TEST SUMMARY (ASTM C136)

(575) 642-7671

COZ Engineering, LLC

PO Box 13331

Las Cruces, NM 88013

Plasticity Index:

GRAIN SIZE - mm

GRAIN SIZE DISTRIBUTION GRAPH

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.0010.010.11101001000

P E

R C

E N

T F

IN

% Passing (Cumulative) 100% 91% 64% 52% 43% 36% 5% 3.2%

Specification

% GRAVEL = 48% D85 = 14.7 D15 = 0.2

% SAND = 48% D60 = 7.7 D10 = 0.2

% SILT & CLAY = 3% D50 = 4.0 CU = 45.3

D30 = 0.3 CC = 0.1

Sample Date: 9/21/23

Project No.: 4223117

Project Name: NMSU Wooten Hall Improvements

Report Date: 10/4/23

Sample Location: B-3 at 25'

Liquid Limit: NP USCS Classification: GP

Material Description: Poorly Graded Gravel with Sand In-Situ Moisture Content: 2.2%

TEST SUMMARY (ASTM C136)

(575) 642-7671

COZ Engineering, LLC

PO Box 13331

Las Cruces, NM 88013

Plasticity Index:

GRAIN SIZE - mm

GRAIN SIZE DISTRIBUTION GRAPH

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.0010.010.11101001000

P E

R C

E N

T F

IN