St-Pete-Hbr-GDR-2017.pdf

SECTION 00 31 32 Geotechnical Data

Report for

Maintenance Dredging

24-Foot Project

St. Petersburg Harbor, Florida

Prepared by

Geotechnical Branch

Engineering Division

Jacksonville District Corps of Engineers

13 March 2017

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GEOTECHNICAL DATA REPORT

Table of Contents

1 SCOPE

2 CHARACTER OF MATERIALS

2.1 Regional and Local Geology

2.2 Materials Encountered

3 DEFINITIONS

3.1 Definitions of Basic Terms

3.2 Current Logging Terms

3.3 Previous Logging Terms

3.4 Testing and Procedure Methods

4 GEOMECHANICAL DATA

4.1 Summary of Field Investigations

4.2 Summary of Index Testing Data

4.3 Summary of Additional Laboratory Testing Data

4.4 Boring Log Notes

4.5 Inspection of Recovered Materials

4.6 Boring Logs

4.7 Laboratory Testing Data

List of Tables

Table 1. Available Boring Data Table 2. Available Surficial Samples Data Table 3: Index Testing Available for this Project

List of Plates

Plate B-1. Overview Map Plate B-2. Sample Location Map

Maintenance Dredging, 24-Foot Project St. Petersburg Harbor, Florida

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GEOTECHNICAL DATA REPORT

1 SCOPE

The information provided in this section encompasses the geotechnical field investigations available for this project. The investigations consist grab samples. The associated logs and laboratory data are presented in paragraphs 4.6 and 4.7, respectively. A character of materials paragraph is included to provide a comprehensive description of the materials utilizing both recent and historical knowledge of the project area. Also included in this section are definitions of terms and boring log notes, which provide additional explanation of the boring logs and drilling techniques.

Items discussed in the character of materials paragraph may not appear explicitly on the boring logs. Based on historic knowledge of the project area, the character of materials paragraph includes items that supplement the data documented by the boring logs. When reviewing the boring logs, use all of the data on the logs, including the materials description, legend, and blow counts. When evaluating the subsurface conditions, use all of the data, including the character of materials paragraph and boring logs.

During the solicitation period, any questions that pertain to the information provided in this section should be addressed to the contract specialist identified in Block 9 of SF1442. After contract award, questions should be addressed to the appointed ACO/COR, which will coordinate with Geotechnical Branch.

2 CHARACTER OF MATERIALS

2.1 REGIONAL AND LOCAL GEOLOGY

Much of Florida's surface is covered by a series of interbedded limestone, dolostone, sand and clay units ranging from the Eocene to Holocene Epoch.

The local geology of Hillsborough Bay consists of an uppermost layer of undifferentiated Quaternary Period sediments - comprised of silica clastic, organic sediments and freshwater carbonates. Those sediments range in thickness from approximately 30 to 80 feet and are underlain by the 50 ft. to 330 ft. thick, Oligocene/Pliocene deposits of the Hawthorn Group consisting of phosphatic silica clastic (sand, silt and clay) and carbonates. Underneath the Hawthorn group are limestones and dolostones of the Ocala Limestone and Eocene Avon Park Formation present.

2.2 MATERIALS ENCOUNTERED

St. Petersburg Harbor has been dredged for maintenance historically multiple times and was dredged last in 2000.

The project site vicinity is depicted on Plate B-1. Sampling locations are presented on Plate B-2 and listed in Table 1 and 2. Laboratory data for the project area is summarized in Table 3.

The materials to be dredged are described on the historic boring logs from 1993 and gradation curves from surface samples collected 2017. The shoaling materials presented on the 1993 boring logs and respective sediment gradation curves has been removed with subsequent shoaling of similar materials.

The material to be dredged in the Turning Basin and the Entrance Channel is composed primarily of silt with trace to some sand, and with moisture contents of up to 200%, and poorly graded

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quartz sand, sand with silt, and silty and clayey sand with trace shell. Trash and debris, such as ropes, anchors, beer cans, and plastic bottles from navigation activities are present in the materials to be dredged.

3 DEFINITIONS

Definitions not explicitly indicated in the sections below are typical industry standard definitions from their respective ASTMs.

3.1 DEFINITIONS OF BASIC TERMS

Carbonate – Soil component that reacts with HCl of an indeterminate origin (shell, rock, etc.).

Fill – Material that has been placed by man, described with all soil characteristics.

Layer – Rock or soil with a thickness of 6 inches or less.

Lens – A geologic deposit of variable thickness, which disappears laterally in all directions and cannot be correlated to adjacent borings.

Rock – A naturally occurring substance composed of one or more minerals bound together. This geologic term includes a range of engineering properties: strength, hardness, permeability, weathering, and discontinuity. These properties are noted or can be inferred from the boring logs as blow counts, penetration rate, RQD, hardness, etc.

Shell – Material composed of predominantly (>75%) coarse-grained sand to gravel-sized whole or broken shell.

3.2 CURRENT LOGGING TERMS

Definition of terms used on boring logs dated since 2000:

Banded - 0.02' (6 mm) to 0.1' (3.0 cm).

Boulder-Sized – Particles greater than 12 inches in diameter.

Cavity - Voids greater than the diameter of the core.

Coarse Grained - Grain diameter greater than 0.079" (2 mm) for sedimentary rocks or 0.197" (5

mm) for igneous or metamorphic rocks.

Coarse Grained Sand-Sized – Less than 10 percent of fine and medium grained sand sizes are present.

Coarse Gravel-Sized – Particles greater than 3/4 of an inch but less than 3 inches in diameter.

Cobble-Sized – Particles greater than 3 inches but less than 12 inches in diameter.

Decomposed – Applicable to saprolitic rock; rock is essentially reduced to a soil with a relic rock texture; can be molded or crumbled by hand.

Dipping (Dip) - 20 to 45 degrees.

Discontinue – Particles were present within the unit above but are no longer present.

Fine Grained - Grain diameter between 0.004" (0.1 mm) and 0.016" (0.4 mm) for sedimentary rocks or 0.039" (1 mm) for igneous or metamorphic rocks.

Fine Grained Sand-Sized - Less than 10 percent of medium and coarse grained sand sizes are present.

Fine Gravel-Sized – Particles greater than No. 4 sieve but less than 3/4 of an inch in diameter.

Flat (Dip) - 0 to 20 degrees.

Fossiliferous – Greater than 40 percent fossils.

Hard (Hardness) - Difficult to scratch with a knife (cannot be pitted with a geology hammer, but can be chipped with moderate blows of the hammer).

Highly Fractured - Spacing 0.3' (9.1 cm) to 1' (30.5 cm).

Highly Weathered - Entire section is discolored; alteration is greater than 50%; some areas of slightly weathered rock are present; some minerals are leached away; retains only a fraction of its original strength (wet strength usually lower than dry strength).

Intact – Spacing greater than 6' (1.8 m).

Intensely Fractured - Spacing less than 0.3' (9.1 cm).

Massive – Over 3' (0.9 m) thick.

Medium-Bedded - 0.3' (9.1 cm) to 1' (30.5 cm) thick.

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Medium Grained - Grain diameters between 0.016" (0.4 mm) to 0.079" (2 mm) for sedimentary rocks or 0.039" (1 mm) to 0.197" (5 mm) for igneous or metamorphic rocks.

Medium Grained Sand-Sized - Less than 10 percent of fine and coarse grained sand sizes are present.

Moderately Fractured - Spacing 1' (30.5 cm) to 3' (0.9 m).

Moderately Hard (Hardness) - Can be scratched easily with a knife, but cannot be scratched by a fingernail (can be pitted with moderate blows of a geology hammer).

Moderately Open (Fracture Aperture) - 0.020" (0.5 mm) to 0.098" (2.5 mm).

Moderately Weathered - Discoloration is evident; surface is pitted and altered, with alterations penetrating well below rock surfaces; 10% to 50% of the rock is altered; strength is noticeably less than unweathered rock.

Non-fossiliferous – No observed fossils.

Open (Fracture Aperture) - 0.098" (2.5 mm) to 0.394" (10 mm).

Pitted - Voids 0.039" (1mm) to 0.236" (6mm) in diameter.

Porous - Voids less than 0.039" (1mm) in diameter.

Slightly Fractured - Spacing 3' (0.9 m) to 6' (1.8 m).

Slightly Weathered - Superficial discoloration, alteration and/or discoloration along discontinuities;

less than 10% of the rock volume is altered; strength is essentially unaffected.

Soft (Hardness) - Can be scratched with a fingernail (cannot be crumbled between fingers, but can be easily pitted with light blows of a geology hammer).

Solid - Absence of voids.

Sparsely Fossiliferous – Less than 40 percent fossils.

Steeply Dipping (Dip) - 45 to 90 degrees.

Thick-Bedded – 1' (30.5 cm) to 3' (0.9 m) thick.

Thin-Bedded - 0.1' (3.0 cm) to 0.3' (9.1 cm) thick.

Thin Parting - Paper thin to 0.002' (0.6 mm).

Tight (Fracture Aperture) - 0.004" (0.1 mm) to 0.020" (0.5 mm).

Unweathered - No evidence of any mechanical or chemical alteration.

Very Fine Grained - Grain diameter less than 0.004" (0.1 mm); individual grains or crystals are too small to be seen with the naked eye.

Very Hard (Hardness) - Cannot be scratched with a knife (chips can be broken off only with heavy blows of a geology hammer).

Very Soft (Hardness) - Can be deformed by hand (has a rock-like character, but can be easily broken by hand).

Very Tight (Fracture Aperture) - less than 0.004" (0.1 mm).

Very Wide (Fracture Aperture) - 0.394" (10 mm) to 0.984" (25 mm).

Vuggy - Voids 0.236" (6mm) to the diameter of the core.

3.3 PREVIOUS LOGGING TERMS

Definition of terms used on boring logs dated before 2000:

Dense – Equivalent to SPT N-value of 30 to 50.

Incompetent – Rock that disintegrates while coring; weak.

Indurated – Rock or soil hardened or consolidated by pressure or cementation. Very difficult to break by hand.

Poorly-Indurated – See semi-indurated.

Seam – Rock or soil with average thickness of 2 to 3 inches.

Semi-Indurated – Rock or soil with a lesser degree of hardening or consolidation by pressure or cementation. Crumbles with little effort by hand.

3.4 TESTING AND PROCEDURE METHODS

Test/Procedure Method Abrasion Resistance of Large-Size Coarse Aggregate, Los Angeles Machine

ASTM C535

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Test/Procedure Method Abrasion Resistance of Small-Size Coarse Aggregate, Los Angeles Machine

ASTM C131

Air Content by the Pressure Method ASTM C231 Air Content by the Volumetric Method ASTM C173 Air-Entraining Admixtures for Concrete ASTM C233 Atterberg Limits, wet preparation method, test method a multipoint ASTM D4318 Bulk Specific Gravity of Bituminous Mixtures ASTM D2726 Capping Cylindrical Concrete Specimens ASTM C617 Carbonate Content ASTM D4373 Compaction: 4" Mold, Modified Proctor ASTM D1557 Compaction: 4" Mold, Standard Proctor ASTM D698 Compaction: 6" Mold, Modified Proctor ASTM D1557 Compaction: 6" Mold, Standard Proctor ASTM D698 Compressive Strength of Cast in Place Concrete Cylinders ASTM C873 Compressive Strength of Cylindrical Concrete Specimens (Set of 4) ASTM C39 Compressive Strength of Lightweight Concrete ASTM C495 Consolidation, each load of rebound increment with complete time ASTM D2435

Density and Water Content of Soil by Nuclear Methods (Minimum 4)

ASTM

D2922/D3017

Density of Bituminous Concrete in Place by Nuclear Methods (Minimum 4)

ASTM D2950

Density of Soil in Place by the Sand-Cone Method ASTM D1556 Direct Shear ASTM D3080 Drilled Cores and Sawed Beams of Concrete ASTM C42 Extraction of Bituminous Paving Mixtures ASTM D2172 Freezing and Thawing (up to 55 cycles) ASTM D5312 Grain size sieve Analysis ASTM D422 Hydrometer Analysis ASTM D422 Making and Curing Concrete Test Specimens in the Field (Set of 6) ASTM C31 Making and Curing Concrete Test Specimens in the Lab (Set of 4) ASTM C192 Marshall Resistance to Plastic Flow (Set of 3) ASTM D1559 Material Passing No. 200 Sieve ASTM D1140 Modulus of Elasticity ASTM D3148 Moisture Content ASTM D2216

Munsell Color Munsell Soil Color Charts

Organic Content, Test Method C ASTM D2974 Organic Impurities in Fine Aggregate ASTM C40 Permeability: Constant Head Permeability ASTM D2434 Permeability: Falling Head Permeability ASTM D5084 Petrographic Examination ASTM C295 Sampling Aggregate (Minimum 4 hours) ASTM D75 Sampling Freshly Mixed Concrete ASTM C172 Sedimentation Rate No ASTM Sieve Analysis of Aggregate ASTM C136 Slump of Hydraulic-Cement Concrete ASTM C143 Soil Classification (Boring logs) ASTM D 2488

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Test/Procedure Method Specific Gravity and Absorption of Fine Aggregate ASTM C128 Specific Gravity for Rock ASTM C127 Specific Gravity for Soil ASTM D854

SPLITTING TENSILE STRENGTH ASTM D3967

Splitting Tensile Strength of Concrete Cylinders ASTM C496 Subsample Preparation ASTM D4220, Group B ASTM D4220, Sulfate Soundness ASTM C88 Total Evaporable Moisture Content ASTM C566 Triaxial Compression Test for Rock with Strain Gages or LVDTs (per confining pressure)

ASTM D2664

Triaxial compression: Consolidated Undrained (CU) Triaxial Compression Test R Test with Pore Pressure Measurements (per confining pressure)

ASTM D4767

Triaxial compression: Unconsolidated Undrained (UU) Triaxial Compression Test Q Test with Pore Pressure Measurements (per confining pressure)

ASTM D2850

Unbonded Caps for Compressive Strength ASTM C1231 Unconfined Compressive Strength for Rock Greater than 9,000 psi with Strain

ASTM D2938

Unconfined Compressive Strength for Rock up to 9,000 psi with Strain

ASTM D2938

Unconfined Compressive Strength for Soil ASTM D2166 Unit Weight and Absorption ASTM C127 Unit Weight of Aggregate ASTM C29 - Visual Percent Shell No ASTM Wetting and Drying ASTM D5313

4 GEOMECHANICAL DATA

4.1 SUMMARY OF FIELD INVESTIGATIONS

The tables below summarize the field investigations data set available for this project.

Table 1. Available Boring Data

Designation State Plane, FL-East, NAD83

Project Location X Y

CB-SPH93-1 456369.133 1245513.532

Entrance Channel CB-SPH93-2 455359.131 1245773.529

CB-SPH93-3 454964.13 1245548.526

CB-SPH93-4 453117.127 1246095.521

Turning Basin CB-SPH93-5 453066.127 1246210.522

CB-SPH93-6 452820.126 1246641.523

CB-SPH93-7 452954.127 1245598.518 Entrance Channel

CB-SPH93-8 452419.127 1245483.516 Entrance Channel

CB-SPH93-9 452179.125 1246008.517

Turning Basin

CB-SPH93-10 451844.125 1246323.517

* Coordinates presented are converted from NAD27 and correspond to the project coordinate system and datum

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Table 2. Available Surficial Samples Data

Designation State Plane, FL-East, NAD83 Project Location Available for Inspection

X Y GS-St.PHbr17-03 452128 1246183

Turning Basin

GS-St.PHbr17-04 452786 1246428

GS-St.PHbr17-05 452567 1245751

GS-St.PHbr17-06 453148 1245542 Entrance Channel

GS-St.PHbr17-07 453177 1246045 Turning Basin

GS-St.PHbr17-08 457715 1245572 Entrance Channel

GS-St.PHbr17-09 458138 1245701

Coordinates presented correspond to the project coordinate system and datum

4.2 SUMMARY OF INDEX TESTING DATA

The table below summarizes the index testing available for this project.

Table 3: Index Testing Available for this Project

Boring Designation

Sample Designation

USCS

Visual Shell wn

Munsell Color

CB-SPH93-1 1 SP 18.5

CB-SPH93-1 2 SP-SM

CB-SPH93-2 1 SP

CB-SPH93-2 2 SP-SM 22.5

CB-SPH93-3 1 SP-SM 21.7

CB-SPH93-4 1 MH

CB-SPH93-5 1 MH 219.1

CB-SPH93-6 1 MH

CB-SPH93-6 2 MH

CB-SPH93-7 1 SM 19.7

CB-SPH93-7 2 SC 1.6

CB-SPH93-9 1 SM 202.5

CB-SPH93-9 2 SP-SM 22.1

CB-SPH93-10 1 SM

GS-St.PHbr17-03 1 MH 10Y 3/1 GS-St.PHbr17-04 1 MH 10Y 3/1 GS-St.PHbr17-05 1 MH 10Y 3/1 GS-St.PHbr17-06 1 MH 10Y 3/1 GS-St.PHbr17-07 1 MH 10Y 3/1 GS-St.PHbr17-08 1 SP 7 10YR 6/2 GS-St.PHbr17-09 1 SP 2.8 10YR 6/2

USCS: Unified Soil Classification System; wn: moisture content;

4.3 SUMMARY OF ADDITIONAL LABORATORY TESTING DATA

Sedimentation rate curves were obtained for this data set. Testing results are summarized in the table below. Test data sheets are included in paragraph 4.7.

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4.4 BORING LOG NOTES

Borings CB-SPH93-1 through CB-SPH93-10 were driven using the Standard Penetration Test (SPT) procedure with a 140 pound hammer with a 30-inch drop using a 2.0 foot split spoon (1 3/8-inch I.D. and 2-inch O.D.). Borings were advanced in 18-inch intervals, or until refusal was encountered. Refusal is defined as a total of 50 blows of the hammer within any 6-inch increment, a total of 100 blows within any 1-foot increment, or no observed advance of the sampler after 10 successive blows of the hammer.

Surface Samples GS-St.PHbr17-03 through GS-St.PHbr17-09 were collected with an AMS 6”x6”x6” clam shell sampler which weighs approximately 25 pounds. The sampler was tied to nylon rope and mounted on a shipboard winch with pulley. During sampling, the clam shell was allowed to free-fall from the winch at the target location.

4.5 INSPECTION OF RECOVERED MATERIALS

The material recovered from surface samples marked with a checkmark in Table 2 is available for inspection by prospective offerors at the Corps of Engineers District warehouse listed below:

Address: 3077 Talleyrand Avenue Jacksonville, 32206 Florida Hours: 7:00 am to 2:30 pm

The recovered materials will be available for inspection during normal business hours as noted above, except Federal holidays, during the entire bid period. Prospective offerors shall notify the project geologist at 904-232-1890 or Chief, Geology and Explorations Section at 904-232-1617 at least four (4) working days before the visit.

The following information will be required to schedule the visit:

(1) Project title;

(2) Specific borings or entire set which are to be viewed;

(3) Date, time, and duration of the visit;

(4) Name of the person(s) and company to view the borings; and

(5) Point of contact and phone number regarding the visit.

Prospective offerors shall record their material examination visit in a record book maintained at the inspection site.

It is strongly suggested that prospective offerors view the samples before submitting their bid.

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CUT-A(HB)

CU

T-C

(H B)

CUT-D(HB)

PLATE B-2

Dwn by:

Ckd by:

Dated:

DEPARTMENT OF THE ARMY

JACKSONVILLE DISTRICT, CORPS OF ENGINEERS

JACKSONVILLE, FLORIDA

PLATE NO.

B-1JC

BUN

BUN

3Feb2017

Dsn by:

MAINTENANCE DREDGING 2017

Hillsborough County St. Petersburg Harbor

Ü

0 5 102.5 Miles

OVERVIEW MAP

Project Area

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? GS-St.PHbr17-09

GS-St.PHbr17-08

GS-St.PHbr17-07

GS-St.PHbr17-06GS-St.PHbr17-05

GS-St.PHbr17-04

GS-St.PHbr17-03

CB-SPH93-9

CB-SPH93-8

CB-SPH93-6

CB-SPH93-5

CB-SPH93-3

CB-SPH93-1

CB-SPH93-10

CB-SPH93-7

CB-SPH93-4

CB-SPH93-2

Dwn by:

Ckd by:

Dated:

DEPARTMENT OF THE ARMY

JACKSONVILLE DISTRICT, CORPS OF ENGINEERS

JACKSONVILLE, FLORIDA

PLATE NO.

B-2JC

BUN

BUN

5April16

Dsn by:

MAINTENANCE DREDGING 2017

Hillsborough County St. Petersburg Harbor

Legend ? Surface Samples 2017 ' Core Borings

Channel Outline Ü

0 1,500 3,000750 Feet

SAMPLE LOCATION MAP

ENTRANCE CHANNEL

TURNING BASIN

OU

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R C

HA

NN

EL

CU

T-A

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A 6

ST

A 4

STA 0

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4.6 BORING LOGS

Applicable boring logs are presented on the following pages.

The borings presented in this section are available historic borings within the project area. Most of the materials within the project template presented on the boring logs have been removed by previous dredging events with subsequent shoaling of similar materials. The current elevations of the materials at these locations are shown on the contract drawings.

While the Government’s borings are representative of subsurface conditions at their respective locations and vertical reaches, local variations in the characteristics of the subsurface materials of this region are to be expected.

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4.7 LABORATORY TESTING DATA

Applicable laboratory testing data are presented on the following pages.

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Maintenance Dredging, 24-Foot Project

SECTION 00 31 32-26

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Maintenance Dredging, 24-Foot Project

SECTION 00 31 32-27

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Maintenance Dredging, 24-Foot Project

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Maintenance Dredging, 24-Foot Project

SECTION 00 31 32-30

SECTION 00 31 32-31

SECTION 00 31 32-32

SECTION 00 31 32-33

SECTION 00 31 32-34

SECTION 00 31 32-35

SECTION 00 31 32-36

SECTION 00 31 32-37

SECTION 00 31 32-38

SECTION 00 31 32-39

SECTION 00 31 32-40

SECTION 00 31 32-41

SECTION 00 31 32-42

SECTION 00 31 32-43

SECTION 00 31 32-44

SECTION 00 31 32-45

SECTION 00 31 32-46

SECTION 00 31 32-47

SECTION 00 31 32-48

SECTION 00 31 32-49

SECTION 00 31 32-50

SECTION 00 31 32-51

SECTION 00 31 32-52