Tampa Harbor Contract-1 Geotech-Data-Summary

Tampa Harbor Improvements
Upper Channels
Geotechnical Data Summary

November 2026

Tampa Harbor Improvements - Upper Channels
Geotech Data Summary

1.1

1.2

2.1

2.2

2.3

Tampa Harbor Improvements - Upper Channels
Geotech Data Summary

1 USACE 2026 BORINGS

The following pages include a boring location map, draft boring logs of the SPT/Core borings drilled by USACE 2026 and respective lab testing results of selected samples.

Tampa Harbor Improvements - Upper Channels
Geotech Data Summary

Tampa Harbor Improvements - Upper Channels
Geotech Data Summary

1.1 BORING LOGS

Tampa Harbor Improvements - Upper Channels
Geotech Data Summary

Boring Designation

DIVISION

DRILLING LOG

10. COORDINATE SYSTEM

Tampa Harbor Deepening SPT 2026 and 2027
Tampa Harbor

2. HOLE NUMBER

VERTICAL

World Geodetic System Longitude / Latitude (WGS 84)

LOCATION COORDINATES

N: 27.92

3. DRILLING AGENCY

CB-TH26-UC-01

Corps of Engineers - CESAS

12. HAMMER TYPE

Doug Hutchins

Automatic

5. EQUIPMENT

E: -82.42

11. DATE BORING

4. NAME OF DRILLER

STARTED

COMPLETED

Aug 22 2026

Aug 22 2026

EFFICIENCY (%)

Mud rotary

BEARING

17.80'

16. TOTAL NUMBER CORE BOXES

17. SIGNATURE AND TITLE OF INSPECTOR

17.80'

Jack Kulaga

SILT (ML); mostly nonplastic FINES; dark grayish black, wet, very soft, trace fine sand, no odor, no cementation, no staining

0 WOR

S-1

S-2

S-3

/1.5'

0 WOR

MC

ASTM

Class

LABORATORY

DR
AF

%
REC

APPROVED BY:

PI

CLASSIFICATION OF MATERIALS

(Description)

LL

LEGEND

N

LAYER

DEPTH

ELEV.

Sand

8. DEPTH DRILLED INTO ROCK

9. TOTAL DEPTH OF BORING

T

15. ELEVATION GROUND WATER

Fines

7. THICKNESS OF OVERBURDEN

-42.2'

14. ELEVATION SURFACE

Gravel

Vertical

DEG FROM VERTICAL

SAMP NO.

6. DIRECTION OF BORING

MLLW

LOCATION METHOD:

13. SIZE AND TYPE OF BIT

CME-850 XR

BLOWS/

0.5ft

SHEET

South Atlantic

1. PROJECT

DEPTH

CB-TH26-UC-01

INSTALLATION

REMARKS

0 - 18: Mud

rotary, PQ

0 - 2: DTW: 8.8ft

MLLW: +2.80

DTM: 53.8ft

/1.5'

0 WOR

/1.5'

0/1"

16 50/3"

5.60
-47.80
6.30
-48.50

S-4A
S-4B

CLAYEY SANDSTONE AND LIMESTONE, decomposed

weathered, thickly bedded, pale gray, fine grained to medium grained, strong rock, moderately hard
CLAYEY LIMESTONE, moderately weathered, thickly
bedded, light yellowish gray, very fine grained to coarse grained, carbonaceous, medium weak rock to strong rock, very soft to soft, damp, vuggy

S-5

5.6 - 10.6: 400

psi down
pressure

10 ft: decomposed, moderately plastic clay

10.60
-52.80

LEAN CLAY (CL); mostly medium plasticity FINES; light gray, moist, stiff, trace fine sand, no odor, no cementation, no staining

S-6

50/1"

12.90
-55.10