2008-10-22 RETL Geotech Report.pdf
1. II Boring Log

October 22, 2008

Attn.: Mr. Daniel Heilman, P

.E.

RETL Job No.: Gl08558

WEST GALVESTON ISLAND LG. SCALE BEACH NOURISHMENT PROJECT

South Jetty Borrow Source Area

Galveston, Texas

BORING NO.

GPS

COORDINATES

C-Ol

N.29.33841

W.94.72652

C-02

N.29.33981

W.94.72643

C-03

N.29.33892

W.94.72394

C-04

.29.33793

.94.72235

C-05

N.29.33645

W.94.72380

C-06

N.29.33628

W.94.72204

C-07

N.29.33395

W.94.72095

C-08

N.29.33927

W.94.71980

C-09

N.29.33801

W.94.72057

C-lO

N.29.33691

W.94.71941

e-n

N.29.33475

W.94.71779

C-12

.29.33336

.94.71779

C-13

N.29.33744

W.94.71832

C-14

N.29.33970

W.94.71677

C-15

.29.33820

.94.71687

C-16

N.29.33661

W.94.71597

C-17

N.29

.33607

W.94.71563

C-18

N.29.33411

W.94.71399

C-19

N.29.33955

W.94.71420

C-20

N.29.33748

W.94.71338

C-21

N.29.33338

W.94.71127

C-22

N.29.33564

.94.71037

C-23

N.29.33239

W.94.70724

C-24

N.29.33759

W.94.70845

C-25

N.29.33560

W.94.70621

C-26

N.29.33506

W.94.71728

C-27

N.29.33483

W. 94.7161 1

C-28

N.29.33711

W.94.72358

C-29

N.29.33742

W.94.71455

C-30

N.29.33811

W.94.72344

C-31

N.29.33493

W.94.72033

C-32

N.29.33541

W.94.73054

In addition, forty surface grab samples from onshore and offshore of the Gulf beach along west Galveston

Island were obtained and delivered to RETL by a representative

of HDR, Inc. The ground surface

elevations at the offshore grab sample locations are provided in the table below:

30f6

TOE

V101

APPROXI

MATE

VIBRACORE

LOCA

Tlm~

(

1992)

APPROXIMA

SOIL BORING

LOCATlmJ

(2008)

APPROXIMA

VIBRACORE

LOCA

TlmJ

(2006)

;~~~',::~;~S:e~

~~~~~ ~~U~3;)

POl

NORTHING

EASTING

13,696,434

3,330,395

13,696,162

3,336,429

13,692,769

3,337,805

13,693,282

3,332.723

13,693,492

3,331,448

13,694,395

3,330

,426

13,695,190

3,329,078

13,695,521

3,328,798

13,695,713

3,328,795

13,696,135

3,328,81

13,696,306

3,329,220

BR-22

LEGEND,

.C32

BORROW SOURCE AREA

TOE

AGNETOMETER

NJO

MAUES

WERE LOCA

TED

BS&J DURING

BRUARY 2008

SOUT

JETTY BORROW

SOURCE AREA

•

----------;1--------

1N~OU

ES~

-------

FER T

O NO

TES

ON SH

EET

101

----_~-'

- - - - - - -

-.J___

LEVATlm, co,

nOURS

ARE IU

I'---~-_

EFERErKED

TO NAVD88

"14

~_,,

-,~

....

WEST GALVESTON ISLAND

END OF SEAWALL BEACH NOURISHMENT

PRELIMINARY

GULF OF MEXICO

.CHI

',.

ee26

ec1$

BR-l

em?

SOUT

HJETTYJ

PROJ

J U

MBE

I 8809 1

:C~

EUOTH

J~ B~uRROW

SOURCE AREA

I""""'"i

.C31

eC07

@8R-27

1~_.~

BR~9-

~'7.

eC06

_1~C17

eC05

10/

17/08

0/20/08

@BR-19

@BR-24

ISSUE

ROJ

ECT

MMJAGER DNJIEL J,

ILMAN

DRAW~

BY BRUC

L, JACKSmJ

CHECK

ED B

LAUREN

AUGUS

TI~J

@8R-16

@BR-25

@8R-2.2

@8R-23

@BR-17

lil~

SHINER

MOSELEY

@8R-18

APFFEL PARK

•

BR-3@~-~

~R-'4

smllh

rine

e rvices

-c

LOG OF BORING C-04

SHEET 1 of 1

,"'<?,f'''

CLIENT:

HDR, Inc.

'5:-t-.~

!f~

Rock Engineering & Testing l.ab., Inc.

PROJECT:

Prop. Large Scale Beach Nourishment Project

e''"+.

>',

6817 Leopard SI.

•

Corpus Christi, TX 78409

LOCATION: S. Jetty Borrow Source Area; Galveston, TX

Telephone: (361) 883-4555

NUMBER:

G108558

~4)'o

o<l?-QO

Fax: (361) 883-4711

~J.- \~c;

DATEIS) DRILLED:

08/01/08

FIELD DATA

LABORATORY DATA

DRILLING METHOD(S):

ATTERBERG

Hollow Stem Auger

LIMITS

;;-

_l!

GROUNDWATER INFORMATION:

I-

2:,

~S2

iiJ

~ffJ

;;;

I-

:;;

I-

:;;

t;:t;:t;:[rl~

:;;

::;

~ ~

,,'

::>

::;

c»

..... ooO::..J

Uiu

<Il :I: u,

:;;

<Il

~~~~~

[;;

Zii;

<Il I- 0

::>

<Il

W"'<Il

<Il

:'5

<Il

D..

OZ2

0::.::

D.. W <Il

SURFACE ELEVATION: -12.8' NAVD

:;;

ffi~~o::o

D..

>-::>

~a::~

::>

<il

-c

",0

<Il

Zli~~~

:;;

CD..

otnt:

;;;

DESCRIPTION OF STRATUM

POORLY GRADED SAND, with clay and shell, dark gray,

s-i

N= 2

moist, very loose.

Sameas above.

S-2

N= 1

Sameas above.

S-3

N= 2

POORLY GRADED SAND, with clay and shell, dark gray,

S-4

N= 20

moist, medium.

I Sameasabove, loose.

N=9

3.6_

S-5

-----

--r

SILTY CLAYEYSAND:-WithSlieiCdari< gray

~very

moist;very- - -

N=WOH

loose.

S-6

Same as above.

S-7

N= 1

Sameas above.

S-8

N= 1

SANDY CLAY. with shell, dark gray, very moist, very stiff.

N= 33

S-9

N=WOH

Sameas above, very soft.

S-10

N= 3

Sameas

above, soft.

S-11

! Boring was extended to an elevation of -34.8-feet NAVD during

I the drilling operations,

N - STANDARD PENETRATION TEST RESISTANCE

REMARKS:

;:1

P - POCKET PENETROMETER RESISTANCE

Boring depth and location was determined by HDR, Inc. Boring operations were

performed by RETL.

T - POCKET TORVANE SHEAR STRENGTH

GPS Coord. N, 29,33793 W 94.72235

. Geotechnical Engineering

. Construction Materials Testing

PROJECT NAME: West Galveston Island Large Scale Beach Nourishment Project

CLIENT: HDR, Inc.

BORING ID.: C-04

DESCRIPTION: South Jetty Borrow Source Area

PERCENT SHELL BY WEIGHT (BASED ON #10 SIEVE)

-12.8'

TO -14.8'

-16.8' TO -18.8'

-20.8' TO -22.8'

-22.8'

TO -24.8'

-28.8' TO -30.8'

NAVD

NAVD'

2.02

12.16

1.49

N/A

FINER BY WEIGHT AFTER REMOVING SHELL

ASTM

MESH

-12.8' TO -14.8'

-16.8' TO -18.8'

-20.8' TO -22.8'

-22.8' TO -24.8'

-28.8' TO -30.8'

NAVD

NAVD'

#10

100.00

N/A

#18

97.66

76.69

98.02

N/A

#35

95.24

56.04

94.14

N/A

#60

91.60

44.54

90.32

N/A

#70

88.00

39.90

87.40

N/A

#100

49.60

22.60

60.88

N/A

#120

15.95

8.52

23.17

N/A

#170

6.83

4.56

13.20

N/A

#200

5.51

4.14

10.92

25.60

51.30

STATISTICS (EXCLUDING SHELL)

MEDIAN GRAIN

0.16

0.36

0.16

N/A

SIZE (mm)

MEAN GRAIN SIZE

0.16

0.44

0.15

N/A

(mm)

SORTING

(0)

N/A

1.38

N/A

*C-04; -22.8' to -24.8' NAVD and C-04; -28.8' to -30.8' NAYO were only passed through the -#200 sieve.

"The -# I0 material was utilized as the total sample for Grain Size Distribution Curve calculations.

U.S, SIEVE OPENING IN INCHES

U.S. SIEVE NUMBERS

HYDROMETER

4 3

2 1.5

1 3/4 1/2

3/8

810 14

30 40 50 60 100

140200

100

I-

100

0.01

0.001

GRAIN SIZE INMILLIMETERS

COBBLES

GRAVEL

SAND

SILT OR CLAY

coarse

fine

coarse

medium

fine

Specimen ID

Depth

Classification

•

C-04 (-12.8' to -14.8' NAVD)

Borrow Area (-12.8' to -14.8' NAVD)

1.10

1.64

Specimen ID

Depth

D100

D60

D30

D10

%Gravel %Sand

%Silt

%Clay

•

C-04 (-12.8' to -14.8' NAVD)

0.164

0.135

0.1

0.0

92.0

6.0

GRAIN SIZE DISTRIBUTION

•.

Rock Engineering & Testing Lab., Inc.

6817

Leopard St.

Project: Prop. Large Scale Beach Nourishment Project

Corpus Christi, TX

78409

Telephone:

(361) 883-4555

Location: SouthJetty Borrow SourceArea; Galveston, Texas

Fax:

(361) 883-4711

Number: G108558

U.S. SIEVE OPENING IN INCHES

U.S. SIEVE NUMBERS

HYDROMETER

2 1.5

3/4 1/2

3/8

810 1416 20 30 40 50

100

140200

100

>- 65

:r:

S! 60

;;:

!;\! 50

>- 45

Il.

100

. 1

0.1

001

0.001

GRAIN SIZE INMILLIMETERS

GRAVEL

SAND

COBBLES

SILT OR CLAY

coarse

fine

coarse

medium

fine

Specimen ID

Depth

Classification

C-04

(-16.8' to -18.8' NAVD)

Borrow Area (-16.8' to -18.8' NAVD)

0.42

4.50

-c

Specimen ID

Depth

D100

D60

D30

D10

%Gravel %Sand

%Silt

%Clay

C-04

(-16.8' to -18.8' NAVD)

0.571

0.173

0.127

0.0

84.0

4.0