3-ITB ATTACHMENT 3 - GEOTECHNICAL REPORT.pdf

TIERRA

7351 Temple Terrace Highway • Tampa, FL 33637

Phone (813) 989-1354 • Fax (813) 989-1355

January 3, 2024

Wade Trim, Inc.

201 N. Franklin St., Suite 1350 Tampa, Florida 33602

Attn: Ms. Nita Naik, P.E.

RE: Report of Geotechnical Engineering Services Tampa Bay Water: SR 52 Water Main Relocation Pasco County, Florida Tierra Project No.: 6511-21-295-001

Ms. Naik:

Tierra, Inc. (Tierra) has completed the geotechnical engineering study for the above referenced project. The results of the study are provided herein.

Should there be any questions regarding this report, please do not hesitate to contact our office at (813) 989-1354. Tierra would be pleased to continue providing geotechnical services throughout the implementation of the project. We look forward to working with you and your organization on this and future projects.

Respectfully Submitted, TIERRA, INC.

Sarah E. Strackbein, E.I. Joseph R. Antinori, P.E.

Geotechnical Engineering Intern Senior Geotechnical Engineer

Florida License No. 73176

TABLE OF CONTENTS

1.0 PROJECT DESCRIPTION

Project Information

Scope of Services

2.0 REVIEW OF PUBLISHED DATA

2.1 USGS Quadrangle Maps

2.2 Potentiometric Surface Maps

2.3 Pasco County Soil Survey

3.0 LABORATORY TESTING

4.0 SUBSURFACE EXPLORATION

4.1 Soil Borings

4.2 Groundwater Information

5.0 RECOMMENDATIONS AND CONSIDERATIONS

5.1 General

5.2 Soil Parameters

5.3 Soil Suitability

5.3 Potentiometric Surface

5.4 Dewatering

5.5 Environmental Classification

5.6 Excavations

REPORT LIMITATIONS

APPENDIX

Report of Core Borings Sheet Summary of Laboratory Test Results for Environmental Classification Soil Parameters

Report of Geotechnical Engineering Services Tampa Bay Water: SR 52 Water Main Relocation Pasco County, Florida Tierra Project No.: 6511-21-295-001

1.0 PROJECT DESCRIPTION

Project Information

The project, as we understand it, consists of relocating a portion of Tampa Bay Water’s collection main to new casing beneath SR 52. The new pipeline will cross SR 52 between Secretariat Road and Philips Highway based on information provided by Wade Trim, Inc.

The geotechnical services herein provide subsurface soil conditions at selected locations along the project alignment and relevant geotechnical engineering information as they pertain to the proposed water main relocation.

Scope of Services

The objective of our study was to identify existing soils and groundwater conditions at selected test locations along the proposed water main relocation alignment. Geotechnical services were provided as follows:

1. Reviewed soil information from the “Soil Survey of Pasco County, Florida” published by the United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS). Reviewed potentiometric and topographic information published by the United States Geological Survey (USGS).

2. Performed two (2) Standard Penetration Test (SPT) borings to a depth of approximately 30 feet below grade.

3. Classified and stratified the soil samples encountered in accordance with the American Association of State and Highway Traffic Officials (AASHTO).

4. Conducted laboratory testing on select soil samples to confirm the visual classification.

5. Prepared this geotechnical report that summarizes the course of study pursued, the field data generated, laboratory test results, subsurface conditions encountered and geotechnical considerations.

The scope of our services did not include an environmental assessment for determining the presence or absence of wetlands or hazardous or toxic materials in the soil, bedrock, groundwater, or air, on or below or around this site. The scope of our services did not include determination of the potential for sinkhole activity. Any statements in this report or on the boring logs regarding odors, colors, unusual or suspicious items or conditions are strictly for the information of our client.

Pasco County, Florida

2.0 REVIEW OF PUBLISHED DATA

2.1 USGS Quadrangle Maps

Based on a review of the “Ehren, Florida” USGS Quadrangle Map, it appears that the natural elevation in the vicinity of the project site is on the order of approximately +80 to +90 feet National Geodetic Vertical Datum of 1929 (NGVD 29).

2.2 Potentiometric Surface Maps

Based on a review of the “Potentiometric Surface Elevation of the Upper Floridan Aquifer” map published by the USGS, the potentiometric surface elevation of the upper Floridan Aquifer in the project vicinity is on the order of approximately +70 to +80 feet, NGVD 29.

2.3 Pasco County Soil Survey

The Pasco County Soil Survey published by the USDA NRCS was reviewed for the project site.

Three (3) soil mapping units were identified. The published soil information is provided in the following paragraphs and table:

Smyrna fine Sand (Map Unit 21): The Smyrna, non-hydric component makes up 70 percent of the map unit. Slopes are 0 to 2 percent. This component is on flats on marine terraces on coastal plains. The parent material consists of sandy marine deposits. The depth to a root restrictive layer is greater than 60 inches. The natural drainage class is poorly drained. Water movement in the most restrictive layer is moderately high. Available water to a depth of 60 inches (or restricted depth) is low. Shrink-swell potential is low. This soil is not flooded, nor is it ponded. The seasonal zone of water saturation is at 12 inches during June, July, August, and September. Organic matter content in the surface horizon is about 3 percent.

Basinger fine sand (Map Unit 23): The Basinger, depressional component makes up 92 percent of the map unit. Slopes are 0 to 1 percent. This component is on depressions, coastal plains. The parent material consists of sandy marine deposits. The depth to a root restrictive layer is greater than 60 inches. The natural drainage class is very poorly drained. Water movement in the most restrictive layer is high. Available water to a depth of 60 inches (or restricted depth) is low. Shrink-swell potential is low. This soil is not flooded; however it is frequently ponded. The seasonal zone of water saturation is at 0 inches during January, February, May, June, July, August, September, October, November, and December. Organic matter content in the surface horizon is about 5 percent.

Narcoossee fine sand (Map Unit 26): The Narcoossee component makes up 90 percent of the map unit. Slopes are 0 to 2 percent. This component is on rises on marine terraces on coastal plains. The parent material consists of sandy marine deposits. The depth to a root restrictive layer is greater than 60 inches. The natural drainage class is moderately well drained. Water movement in the most restrictive layer is high. Available water to a depth of 60 inches (or restricted depth) is very low. Shrink-swell potential is low. This soil is not flooded. It is not ponded. The seasonal zone of water saturation is at 33 inches during June, July, August, September, October, November. Organic matter content in the surface horizon is about 4 percent.

Pasco County, Florida

SUMMARY OF USDA SOIL SURVEY

PASCO COUNTY, FLORIDA

USDA Map Symbol and Soil Name

Depth (in)

Soil Classification Permeability

(in/hr) pH

Seasonal High Water Table

USCS AASHTO

Depth (feet)

Months

(21) Smyrna - Smyrna, hydric

0-5 SP-SM, SP A-2-4, A-3 6.0 - 20.0 3.5-5.0

0.5-1.5 Jun-Sep

5-13 SP-SM, SP A-2-4, A-3 6.0 - 20.0 3.5-5.0

13-25 SP-SM, SM A-2-4, A-3 0.6 - 6.0 3.5-5.0

25-80 SP-SM, SP A-3 6.0 - 20.0 3.5-5.0

0-5 SP-SM, SP A-2-4, A-3 6.0 - 20.0 3.5-5.0

0.0-0.5 Jun-Sep

5-13 SP-SM, SP A-2-4, A-3 6.0 - 20.0 3.5-5.0

13-25 SP-SM, SM A-2-4, A-3 0.6 - 6.0 3.5-5.0

25-80 SP-SM, SM A-3 6.0 - 20.0 3.5-5.0

(23) Basinger

Depressional

0-3 SP-SM A-2-4 6.0 - 50.0 3.5-7.3

+2.0-0.0 Jan-Feb, May-Dec

3-8 SP-SM, SP A-3, A-2-4 6.0 - 50.0 3.5-7.3

8-24 SP-SM, SP A-3, A-2-4 6.0 - 50.0 3.5-7.3

24-80 SP-SM, SP A-3 6.0 - 50.0 3.5-7.3

(26) Narcoossee

0-5 SP-SM, SM A-2-4 6.0 - 20.0 3.5-6.0

2.0-3.5 Jun-Nov

5-22 SP-SM, SM A-2-4 6.0 - 20.0 3.5-6.0

22-26 SP-SM, SM A-2-4, A-3 2.0 - 6.0 3.5-6.0

26-36 SP-SM, SM A-2-4 6.0 - 20.0 3.5-6.0

36-80 SP-SM, SM A-2-4 6.0 - 20.0 3.5-6.0

It should be noted that information contained in the USDA/NRCS Soil Survey may not be reflective of current subsurface conditions, particularly if recent development in the project vicinity has modified existing soils or surface/subsurface drainage.

3.0 LABORATORY TESTING

Representative soil samples collected from the borings were classified and stratified based on the AASHTO Soil Classification Systems. Our classification was based on visual observations, using the results from the laboratory testing as confirmation. These tests included fines content, Atterberg Limits series, natural moisture content, organic content, environmental corrosion testing, and Limerock Bearing Ratio Tests. The following list summarizes the laboratory tests performed and respective test methods utilized.

Fines Content Analyses – The fines content analyses were conducted in general accordance with AASHTO test designation T-088 (ASTM test designation D-1140).

Atterberg Limits – The liquid limit and the plastic limit tests ("Atterberg Limits") were conducted in general accordance with the AASHTO test designations T-089 and T-090, respectively (ASTM test designation D-4318).

Natural Moisture Content – The laboratory moisture content tests were conducted in general accordance with the AASHTO test designation T-265 (ASTM test designation D-2216).

Environmental Corrosion – The environmental corrosion tests were conducted in general accordance with the FDOT test designations FM 5-550, FM 5-551, FM 5-552, and FM 5-553.

The laboratory test results are presented on the Report of Core Borings and Summary of Laboratory Test Results for Environmental Classification table in the Appendix.

Pasco County, Florida

4.0 SUBSURFACE EXPLORATION

4.1 Soil Borings

Tierra performed two (2) SPT borings at selected locations to depths of approximately 30 feet below the existing ground surface to evaluate the subsurface conditions in the vicinity of the pipe alignment.

The borings were located in the field using hand-held Garmin Global Positioning System (GPS) equipment with a reported accuracy of ±10 feet. The approximate boring locations are presented on the Report of Core Borings sheet in the Appendix. The SPT borings were performed with the use of a drill rig using Bentonite Mud drilling procedures. The soil sampling was performed in general accordance with American Society for Testing and Materials (ASTM) Test Designation D-1586. The initial 6 feet were manually hand augered to verify utility clearance. SPT resistance N-values were then recorded continuously to the boring termination depth. The soil samples were classified in the field and transported to our laboratory for review and stratification. The soil strata encountered in the SPT borings performed at the project site are summarized in the following table:

Stratum Number Soil Description AASHTO Symbol

1 Dark Brown to Brown Sand to Sand with Silt A-3

2 Light Brown to Gray Silty Sand A-2-4

3 Gray Clayey Sand A-2-4/A-2-6

4 Green to Gray Silt A-7-5

5 Weathered Limestone ---(1)

(1) AASHTO does not provide a symbol for weathered limestone.

The subsurface soil stratification is of a generalized nature to highlight the major subsurface stratification features and material characteristics. The soil profiles included in the Appendix on the Report of Core Boring sheet should be reviewed for specific information at the boring locations. The profile includes soil description, stratification, and penetration resistances, when applicable. The stratifications shown on the boring profiles represent the conditions only at the actual boring location. Variations did occur and should be expected within the project area. The stratification represents the approximate boundary between subsurface soils and the actual transition may be gradual.

4.2 Groundwater Information

At the time of our field exploration, the groundwater levels were measured within the SPT borings at depths ranging from 3 feet to 4½ feet. The measured groundwater levels are depicted adjacent to the respective soil profile on the attached Report of Core Borings sheet.

It should be noted that groundwater levels tend to fluctuate during periods of prolonged drought and extended rainfall and may be affected by man-made influences. Groundwater levels along the proposed force main alignment may be affected by tidal influences. A seasonal effect will also occur in which higher groundwater levels are normally recorded in rainy seasons.

Pasco County, Florida

5.0 RECOMMENDATIONS AND CONSIDERATIONS

5.1 General

Tierra recommends utilizing the current FDOT Standard Specifications and applicable Pasco County Specifications (if applicable) as guidelines for construction of the proposed pipeline. All earthwork activities including the site preparation, clearing and grubbing, removal and utilization/placement of soils, compaction of subgrade soils and selection of fill materials should be accomplished in accordance with the project plans and FDOT Specifications for Road and Bridge Construction (SSRBC) including Section 125 - Excavation for Structures and Pipes.

5.2 Soil Parameters

The results of the borings performed are presented on the Report of Core Borings sheet in the Appendix. A Soil Parameters table is also included in the Appendix. The contractor should review the soil profiles and evaluate the soil types as they relate to their installation methods for the project. The profiles represent the conditions only at the actual boring location. Variations did occur and should be expected within the project area.

5.3 Soil Suitability

The suitability for utilization/placement of soils, compaction of subgrade soils and selection of fill materials should be accomplished in accordance with the project plans and FDOT SSRBC and FDOT Standard Plans Index 120. The following are general considerations for the soils encountered within the borings.

In general, the soils of Stratum 1 (A-3) may be moved and used for pipe backfill, provided it is free of organic materials, clay, debris or any other material deemed unsuitable for construction.

Stratum 2 soils (A-2-4) will retain excess moisture and may be difficult to dry and compact. They should be used above the water level existing at the time of construction.

Strata 3 (A-2-4/A-2-6) and 4 (A-7-5) are plastic materials. If encountered during construction, this material will be difficult to dry and compact and may yield if disturbed or saturated. If this becomes the case, the plastic soils should be over excavated a minimum of 1 foot and replaced with compacted granular fill.

Stratum 5 is natural limestone formation. Variations in the depth and strength of this material should be anticipated. Specialized equipment and/or methods may be required to excavate and/or dewater this material. Tierra recommends the following note be included in the plans:

Weathered limestone (Stratum 5) was encountered within the borings. This material is rock. Excavations into and/or through limestone will be difficult and will require non-conventional construction techniques and specialized equipment. Limestone is also porous and difficult to dewater. Utilize construction methods capable of excavating and dewatering materials encountered during construction at no additional cost to the owner.

Pasco County, Florida

5.3 Potentiometric Surface

Based on a review of the “Potentiometric Surface Elevation of the Upper Floridan Aquifer” map and the “Ehren, Florida” quadrangle map published by the USGS, Tierra recommends the following note be included in the plans:

Based on a review of the “Potentiometric Surface Elevation of the Upper Floridan Aquifer” map published by the USGS, the potentiometric surface elevation of the upper Floridan Aquifer at the project site is on the order of +70 to +80 feet, NGVD 29. The natural ground elevation at the project site ranges from approximately +80 to +90 feet, NGVD 29. Utilize construction methods capable of handling potentiometric surface levels up to +80 feet, NGVD 29, at no additional cost to the owner.

5.4 Dewatering

The contractor’s means and methods for dewatering should be sufficient to achieve compaction at the lowest levels of the excavation and pipe bedding (i.e. maintain a dry working condition).

Tierra anticipates the required dewatering depth will be a minimum of 1 foot below the lowest excavation elevation. However, the actual dewatering depth required may be deeper in order to obtain the required compaction.

5.5 Environmental Classification

Environmental corrosion tests were performed on soil samples obtained from the borings performed. Environmental corrosion tests were conducted in accordance with the FDOT test designations FM 5-550, FM 5-551, FM 5-552, and FM 5-553. Environmental corrosion tests measure parameters including pH, resistivity, sulfate content and chloride content. The test results are presented in the Summary of Laboratory Test Results for Environmental Classification in the Appendix.

5.6 Excavations

Excavations and temporary side slopes should comply with the Occupational Safety and Health Administration’s (OSHA) trench safety standards, 29 C.F.R., s. 1926.650, Subpart P, all subsequent revisions or updates of OSHA’s referenced standard adopted by the Department of Labor and Employment Security and Florida’s Trench Safety Act, Section 553.62, Florida Statutes.

We are providing this information solely as a service to our client. Tierra does not assume responsibility for construction site safety or the contractor’s or other party’s compliance with local, state, and federal safety or other regulations.

Pasco County, Florida

REPORT LIMITATIONS

The information contained in this report are opinions based on the site conditions and project layout described herein and further assume that the conditions observed in the exploratory borings are representative of the subsurface conditions throughout the site, i.e., the subsurface conditions elsewhere on the site are the same as those disclosed by the borings. If, during construction, subsurface conditions different from those encountered in the exploratory boring are observed or appear to be present beneath excavations, we should be advised at once so that we can review these conditions and reconsider our recommendations where necessary.

If there is a substantial lapse in time between the submittal of this report and the start of work at the site, or if conditions or project layout are changed due to natural causes or construction operations at or adjacent to the site, we recommend that this report be reviewed to determine the applicability of conclusions and recommendations considering the changed conditions and time lapse.

This report was prepared for the exclusive use of Wade Trim, Inc., and their client for evaluating the design of the project as it relates to the geotechnical aspects discussed herein. It should be made available to prospective contractors for information on factual data only and not as a warranty of subsurface conditions included in this report. Unanticipated soil conditions may require that additional expense be made to attain a properly constructed project. Therefore, some contingency fund is recommended to accommodate such potential extra costs.

APPENDIX

Report of Core Borings Sheet

Summary of Laboratory Test Results for Environmental Classification

Soil Parameters

B/L SURVEY SR 52

4'

SW

F W

1)

BW

GA

TE CA

TT

LE

GA

P

GA

TE

WOOD

SIGN

SH

EL

L

4' WBF

AS

PH

AL

T GATE

4' BWF

SD

'749+83.11, 132.00' LT.

MATCH EXIST.

W

AT

ER

W

AT

ER

VCW

VCW

WATER

S-2035AA

SM

F-

3-

4B

S-268

B-1

B-2

BORING LOCATION PLAN

PLAN SCALE

0 40'

SOIL PROFILES

CHECKED BY:

DRAWN BY:

DATE:

APPROVED BY:

SCALE: PROJECT NUMBER:

ENGINEER OF RECORD:

LEGEND

N

HA

LOSS OF CIRCULATION OF DRILLING FLUID (100%)

APPROXIMATE LOCATION OF SPT BORING

TIERRA

7351 Temple Terrace Highway Tampa, Florida 33637 Phone: 813-989-1354 Fax: 813-989-1355

HAND AUGERED TO VERIFY UTILITY CLEARANCES

SPT N-VALUE IN BLOWS/FOOT FOR 12 INCHES

OF PENETRATION (UNLESS OTHERWISE NOTED)

12 TO 24

6 TO 12

24 TO 40

8 TO 24

3 TO 8

GREATER THAN 24

LESS THAN 3

GREATER THAN 40

LESS THAN 1

VERY LOOSE

HARD

VERY STIFF

STIFF

SILTS AND CLAYS

CONSISTENCY

FIRM

SOFT

VERY SOFT

LOOSE

MEDIUM

DENSE

VERY DENSE

3 TO 6

1 TO 3

RELATIVE DENSITY

GRANULAR MATERIALS- SPT

(BLOWS/FT.)

SPT

(BLOWS/FT.)

AUTOMATIC HAMMER

GROUNDWATER LEVEL ENCOUNTERED DURING

INVESTIGATION

WEATHERED LIMESTONE

LIGHT BROWN TO GRAY SILTY SAND (A-2-4)

GREEN TO GRAY SILT (A-7-5)

DARK BROWN T0 GRAY SAND TO SAND WITH SILT (A-3/A-2-4)

GRAY CLAYEY SAND (A-2-4/A-2-6)

SS

SW

JAN 2024

JRA

NOTED 6511-21-295-001

PASCO COUNTY, FLORIDA

GEOTECHNICAL ENGINEERING SERVICES

SHEET 1

JOSEPH R. ANTINORI, P.E.

FLORIDA LICENSE NO.:

73176 SR 52 WATER MAIN RELOCATION

D E

P T

H

IN

F E

E T

N

HA

HA

HA

BOR # B-1

EASTING 513128

NORTHING 1450049

DATE 12/19/2023

DRILLER J. BOOTH

HAMMER AUTOMATIC

RIG D-25

N

HA

HA

HA

BOR # B-2

EASTING 513242

NORTHING 1449827

DATE 12/20/2023

DRILLER J. BOOTH

HAMMER AUTOMATIC

RIG D-25

D E

P T

H

IN

F E

E T

A-3 AASHTO GROUP SYMBOL AS DETERMINED BY

VISUAL REVIEW AND LABORATORY TESTING ON

SELECTED SAMPLES FOR CONFIRMATION OF

VISUAL REVIEW

EASTING

NORTHING

EASTING COORDINATE REFERENCED TO THE FLORIDA STATE

PLANE COORDINATE SYSTEM, FLORIDA WEST ZONE, N.A.D. 83

DETERMINED USING HAND-HELD GARMIN ETREX GPS EQUIPMENT

WITH A REPORTED ACCURACY OF +/- 10 FEET

NORTHING COORDINATE REFERENCED TO THE FLORIDA STATE

PLANE COORDINATE SYSTEM, FLORIDA WEST ZONE, N.A.D. 83

DETERMINED USING HAND-HELD GARMIN ETREX GPS EQUIPMENT

WITH A REPORTED ACCURACY OF +/- 10 FEET

B/L SURVEY SR 52

LL

PI

NMC

-200

LIQUID LIMIT (%)

PLASTICITY INDEX (%)

NATURAL MOISTURE CONTENT (%)

PERCENT PASSING #200 SIEVE

-200 = 3 -200 = 4

NMC =

PI =

LL =

-200 = 33

NMC =

PI =

LL =

-200 = 97

NMC =

PI =

LL =

-200 = 31

SOIL TEST RESULTS:

RESISTIVITY 7,700 TO 18,000 OHM-CM

CHLORIDES 15 TO 30 PPM

SULFATES <5 PPM

pH 5.1 TO 7.2

RECOMMENDED ENVIRONMENTAL CLASSIFICATION:

SUBSTRUCTURE CONCRETE: MODERATELY AGGRESSIVE (RESISIVITY=18,000 OHM-CM, pH=5.1) SUBSTRUCTURE STEEL: EXTREMELY AGGRESSIVE (pH=5.1)

NOTE:

BASED ON A REVIEW OF THE “POTENTIOMETRIC SURFACE ELEVATION OF THE UPPER FLORIDAN AQUIFER” MAP PUBLISHED BY THE USGS, THE POTENTIOMETRIC SURFACE ELEVATION OF THE UPPER FLORIDAN AQUIFER AT THE PROJECT SITE IS ON THE ORDER OF +70 TO +80 FEET, NGVD

29. THE NATURAL GROUND ELEVATION AT THE PROJECT SITE RANGES FROM APPROXIMATELY +80 TO +90 FEET, NGVD 29. UTILIZE CONSTRUCTION METHODS CAPABLE OF HANDLING POTENTIOMETRIC SURFACE LEVELS UP TO +80 FEET, NGVD 29, AT NO ADDITIONAL COST TO

THE OWNER.

WEATHERED LIMESTONE (STRATUM 5) WAS ENCOUNTERED WITHIN THE BORINGS. THIS MATERIAL IS ROCK. EXCAVATIONS INTO AND/OR THROUGH LIMESTONE WILL BE DIFFICULT AND WILL REQUIRE NON-CONVENTIONAL CONSTRUCTION TECHNIQUES AND SPECIALIZED EQUIPMENT. LIMESTONE IS ALSO POROUS AND DIFFICULT TO DEWATER. UTILIZE CONSTRUCTION METHODS CAPABLE OF EXCAVATING AND DEWATERING MATERIALS ENCOUNTERED DURING CONSTRUCTION AT NO ADDITIONAL COST TO THE OWNER.

HA HA

Steel Concrete

B-1 0.0 - 4.0 1 7.2 7,700 15 <5 Slightly Aggressive Slightly Aggressive

B-2 0.0 - 4.0 1 5.1 18,000 30 <5 Extremely Aggressive Moderately Aggressive (1)

As per FDOT Structures Design Guidelines

Environmental Classification

(1) Resistivity

(ohm-cm)

(FM 5-551)

Stratum

Number

Summary of Laboratory Test Results for Environmental Classification

Tampa Bay Water: SR 52 Water Main Relocation

Tierra Project No.: 6511-21-295-001

Pasco County, Florida

Boring

Number pH

(FM 5-550)

Depth

(feet)

Chlorides

(ppm)

(FM 5-552)

Sulfates

(ppm)

(FM 5-553)

From To Saturated/

Total Effective

SPT Boring: B-1

Loose

Sand to Sand With Silt 0 13 105 42.6 0 29°

Medium Dense

Sand to Sand With Silt 13 18 112 49.6 0 30°

Medium Dense

Clayey Sand 18 23 115 52.6 900 29°

Medium Dense

Silty Sand 23 30 112 49.6 0 30°

SPT Boring: B-2

Loose

Sand to Sand With Silt to Silty Sand 0 6 105 42.6 0 29°

Loose

Clayey Sand 6 18 115 52.6 700 29°

Medium Dense

Silty Sand 18 23 112 49.6 0 30°

Firm to Stiff

Clay 23 28 115 52.6 930 0°

Soft

Weathered Limestone 28 30 120 57.6 4,000 0°

Internal

Friction

Angle

Soil Parameters

Tampa Bay Water: SR 52 Water Main Relocation

Pasco County, Florida

Tierra Project No.: 6511-21-295-001

Soil

Description

Approximate Depth

(feet)

Soil Unit Weight

(pcf) Cohesion

(psf)