6. PO-75 MCBA Geotechnical Report 12.1.2011.pdf

11955 Lakeland Park Boulevard, Suite 100 Baton Rouge, Louisiana 70809

225.293.2460

December 1, 2011

United States Department of Agriculture Natural Resources Conservation Service 3737 Government Street Alexandria, Louisiana 71302

Attention: Vicki Supler

Subject: Letter Report LaBranche East Marsh Creation (PO-75) PILOT Project File No. 10883-009-02

This letter report presents results, conclusions, and recommendations in relation to the LaBranche East Marsh Creation (PO-75) Pilot Study project. The work presented in this document has been completed under United States Department of Agriculture contract AG-7217-C-10-0003, Order No. AG7217-D-11- 0078 and Modification No. 0001 of this order.

PURPOSE AND SCOPE OF SERVICES

The LaBranche East Marsh Creation (PO-75) PILOT project is located in the open-water and marsh area studied for the LaBranche East Marsh Creation Project (PO-75) on the southwest corner of Lake Pontchartrain in St. Charles Parish, Louisiana. Figure 1 shows the project vicinity in relation to Lake Pontchartrain. The purpose of this investigation for the PILOT project was to determine if locations selected for a small scale pilot study were similar to the larger full-scale project conditions, so that data collected from the pilot study could be directly applied to the entire project. GeoEngineers, Inc.

(GeoEngineers) performed the following services in support of this investigation:

■ Completed three (3) soil borings in the proposed marsh creation area and tested the samples to evaluate subgrade soil consistency between the pilot study locations and the full-scale project.

■ Completed two (2) initial soil borings in Lake Pontchartrain to assess consistency of a proposed borrow area with the full-scale borrow area located further to the west. Preliminary review of the soil samples revealed that the initial proposed borrow area was unsuitable. We relayed this information to the NRCS and a second borrow area was proposed.

■ Completed four (4) soil borings in Lake Pontchartrain to assess the consistency of the second proposed borrow area with the full-scale borrow area. Data review suggests that the second proposed borrow area is sufficiently similar to the full-scale borrow area to provide analogous

USDA-NRCS | December 1, 2011 Page 2

File No. 10883-009-02 dredged fill results. Samples from the newly proposed borrow area were tested to provide specific information about the borings.

■ Prepared graphical profiles of subsurface conditions in the pilot study marsh and borrow areas.

Soil property profiles of marsh creation borings were also created for use in bearing capacity calculations and in future evaluations.

■ Evaluated bearing capacity for both the current and past relevant soil borings near the project area perimeter.

■ Presented observations, results, conclusions, and recommendations in this report. Individual test results are reported in the appendices as noted in the section dealing with laboratory testing.

FIELD EXPLORATION

Sampling for soil borings BHBA-PS1 and -PS2 took place on August 25, 2011. The soil borings were drilled using a pontoon barge-mounted drill rig and taking continuous undisturbed-type samples from the mudline to 20 feet below the mudline. Samples were collected by pushing a 3-inch outside diameter (OD) steel Shelby tube 24 inches into the soil at the sampling depth and retrieving the tube with the soil inside.

The samples were field classified, labeled, and preserved within the tube for transport to the GeoEngineers soils laboratory in Baton Rouge, Louisiana.

Sampling for soil borings BHMC-PS1 through -PS3 occurred on September 8 and 9, 2011. The soil borings were drilled using a two-engine airboat-mounted drill rig. Undisturbed-type samples were taken continuously from the mudline to 20 feet below the mudline and on five-foot centers from 20 feet below the mudline to 30 feet below the mudline. Samples were collected by pushing a 3-inch OD steel Shelby tube 24 inches into the soil at the sampling depth and retrieving the tube with the soil inside. The samples were field classified, labeled, and preserved within the tube for transport to the GeoEngineers’ soils laboratory.

Sampling for soil borings BHBA-PS3 through -PS6 was conducted on October 14, 2011. The soil borings were drilled in Lake Pontchartrain using a pontoon barge-mounted drill rig. Samples were collected continuously from the mudline to 10 feet below the mudline using a 3-inch OD steel Shelby tube sampler.

On retrieval from the subsurface, soil samples were extruded on the barge, classified by our field representative, and preserved for further testing at GeoEngineers’ soils laboratory.

LABORATORY TESTING

At the lab, samples that were kept in sample tubes were extruded, classified to confirm or modify the classification made in the field, and preserved in preparation for further testing. Testing for the pilot study borings followed the same general pattern as for the full-scale project investigation. Samples from soil borings BHBA-PS1 and -PS2 were visually classified; however, no further testing was performed based on the visual classification. Samples from marsh creation soil borings BHMC-PS1 through -PS3 were tested for strength, density, consolidation, specific gravity, organic content, and Atterberg limits. Samples from the soil borings BHBA-PS3 through -PS6 were tested for moisture content, Atterberg limit, and grain-size.

Two self-weight consolidation tests were run on a composite of the BHBA-PS3 through -PS6 samples for use in future modeling efforts. The composite sample was prepared by mixing approximately equal small

USDA-NRCS | December 1, 2011 Page 3 representative portions from every sample into one composite sample. Results of lab testing are shown on the boring logs (Appendix A), and are also included in Appendix B. Select results from consolidation testing are shown in the table below. Self-weight consolidation testing results from Louisiana State University (LSU) are located in Appendix C.

CONSOLIDATION TEST RESULTS

Boring No.

Depth from

Barge Deck (ft)

Depth Below

Apparent Mudline

(ft)

Moisture Content

Specific Gravity

Initial Void Ratio

Compression Index, Cc

Probable

Maximum Preconsolidation

Stress (tsf)

BHMC-PS1 12 9 789 1.67 13.58 7.75 0.16

BHMC-PS2 18 15 67 2.62 1.639 0.79 0.14

BHMC-PS3 6 3 571 1.80 10.39 12.10* 0.5*

*These results are suspect and may be from a faulty test/disturbed sample. We suggest using the specific gravity and moisture content to estimate Cc. The resulting Cc = 0.0054*(SG*MC - 35) = 0.0054*(1.80*571 - 35) = 5.36.

GeoEngineers completed testing comparable to that reported in the November 15, 2010 report by testing composite samples from each soil boring and a composite sample of all soil borings together. Below is a summary of this data.

Year 2011 2010

Soil Boring BHBA-PS3 BHBA-PS4 BHBA-PS5 BHBA-PS6

Composite Sample

BHBA-PS3

through

PS6

Composite Sample

BHBA-1

through 8

Range of Individual

Soil Borings

% Sand 13 8 5 4 4 12 <1 to 51

% Silt 51 47 51 65 40 53 39 to 94

% Clay 36 45 44 31 56 35 6 to 53

Liquid Limit 57 59 63 55 91 63 31 to 92

Plastic Limit

32 39 41 31 22 39 13 to 52

The testing results from individual composite samples from BHBA-PS3 through BHBA-PS6 indicate less clay than the composite sample from these same soil borings, and generally are more consistent with the 2010 composite sample from soil borings BHBA-1 through BHBA-8. Given the consistency between the four individual 2011 soil boring test results, we believe the individual results are more representative than the 2011 composite sample results, and based on this it appears that the pilot study borrow area soil conditions compare favorably with the 2010 borrow area composite sample.

SITE CONDITIONS

The focus of this investigation was to identify both marsh and borrow area locations for the pilot study that were consistent with the larger LaBranche East Marsh Creation site conditions presented in the

USDA-NRCS | December 1, 2011 Page 4

November 15, 2010 geotechnical report prepared by GeoEngineers. As indicated previously, the initial pilot study borrow area soil borings (BHBA-PS1 and -PS2), were not consistent with the larger project borrow area to the west, and another pilot study borrow area was investigated with soil borings BHBA-PS3 through BHBA-PS6. Figure 2 shows the locations of the borings completed for the LaBranche East Marsh Creation PILOT project.

Surface Conditions

All soil boring locations were submerged at the time of sampling. The table below summarizes boring location information. Elevations are listed according to NAVD 88.

SOIL BORING LOCATION INFORMATION

Soil Boring Identification

Latitude Longitude Surveyed Mudline

Elevation (ft)

BHBA-PS1-20 N 30° 03’ 20.1” W 90° 19’ 43.4” -5.18

BHBA-PS2-20 N 30° 03’ 19.7” W 90° 19’ 38.9” -4.73

BHBA-PS3-10 N 30° 03’ 40.1” W 90° 19’ 37.8” -9.73

BHBA-PS4-10 N 30° 03’ 40.2” W 90° 19’ 42.3” -9.48

BHBA-PS5-10 N 30° 03’ 40.2” W 90° 19’ 46.9” -9.83

BHBA-PS6-10 N 30° 03’ 40.2” W 90° 19’ 51.4” -9.86

BHMC-PS1-30 N 30° 03’ 10.0” W 90° 19’ 21.4” -0.04

BHMC-PS2-30 N 30° 03’ 06.2” W 90° 19’ 46.3” 0.08

BHMC-PS3-30 N 30° 03’ 09.2” W 90° 20’ 01.7” -0.36

Marsh Area Subsurface Conditions

Soil stratigraphy in the marsh creation borings was generally similar to that observed in marsh soil borings presented in the November 15, 2010 report prepared by GeoEngineers. Peat and organic clay were identified at all three soil boring locations at depths consistent with the other soil borings completed by GeoEngineers within the marsh creation area. At the location of soil boring BHMC-PS1, the measured soil shear strength was greater than other soil borings completed for this study or the previous November 2010 report study, although the soil stratigraphy was very similar. This distinction affects the conclusions and recommendations as discussed below. Figure 3 shows a graphical interpretation of subsurface conditions in the marsh creation area.

Borrow Area Subsurface Conditions

At soil borings BHBA-PS3 through BHBA-PS6, the soil encountered was generally less organic in BHBA- PS5 and -PS6 than in BHBA-PS3 and -PS4, and became less organic with depth in all the soil borings.

Soil borings BHBA-PS3 and -PS4 encountered peat at the mudline, underlain by organic clay, underlain by clay with progressively increasing silt content within the 10-foot interval sampled. Soil boring BHBA-PS5 encountered the least organic soils, starting with clay at the mudline, with progressively less organic

USDA-NRCS | December 1, 2011 Page 5 content with depth. Soil boring BHBA-PS6 encountered organic clay at the mudline to a depth of approximately 4 feet, at which point the soil became clay with increasing silt content with depth. Figure 4 shows graphical interpretations of subsurface conditions in the two borrow areas investigated for this study.

CONCLUSIONS AND RECOMMENDATIONS

Suitability of Marsh Pilot Study Sites

Soil boring BHMC-PS1 soil test results indicated stronger soils than those seen in the full scale project investigation and the two other pilot study soil borings, despite very similar soil classification profiles.

This does not preclude this location from being used as a pilot study area; however, GeoEngineers recommends that this location be considered more favorable for testing containment alternatives, and less favorable for monitoring settlement magnitude. Higher soil strength generally suggests less settlement and better global bearing capacity and slope stability, all else being equal. These conditions are favorable for testing containment performance because they will result in higher fill elevations for longer periods, thereby maximizing containment loading. For example, if the NRCS plans to evaluate the existing organic peat soil for containment, this would be a good location to do so. Peat is available for construction at this location and reduced settlement due to higher shear strength would mean that fill will remain at a higher elevation longer. Therefore, the force exerted on the containment dikes will be greater than at other locations where more settlement is expected. Additionally, if the soil beneath the containment dikes settles less, the potential for shrinkage once peat fill is placed above water should be greater. In summary, if peat containment dikes work at the BHMC-PS1 location, they should work at the other locations.

The other two locations (BHMC-PS2 and BHMC-PS3) had soil strength profiles more consistent with the larger project area, and are suitable for any pilot study scenario.

As with any geotechnical investigation, these conclusions and recommendations are only based on the soil boring data available and conditions can vary.

Suitability of Borrow Pilot Study Sites

Based on the soil borings, GeoEngineers recommends excavating borrow materials for the pilot study in the vicinity of soil borings BHBA-PS5 or BHBA-PS6, and excavating to the full 10-foot depth investigated within the borrow area to obtain a mix of fill soil that will be most similar to the full-scale project borrow area soil profile. Avoid excavating from the borrow area over a broad shallow area, as this will tend to concentrate organic soils that tend to be present near the mudline, and this will not be representative of the full-scale project borrow area.

Bearing Capacity

The table below shows factors of safety against general bearing failure based on a containment dike with a crown elevation of +5.5 feet, a 5-foot crown width, and 3H:1V (3 horizontal to 1 vertical) slopes.

USDA-NRCS | December 1, 2011 Page 6

FULL-SCALE PROJECT AREA BEARING RESULTS

Boring No.

Ultimate Bearing Capacity

(psf)

Estimated Bearing Pressure

(psf)

Factor of

Safety

BHMC-1 691 470 1.47

BHMC-2 656 477 1.38

BHMC-3 664 470 1.41

BHMC-5 600 465 1.29

BHMC-7 & -8 624 465 1.34

Bearing capacities computed using NAVFAC DM-7 Figure 11-5

PILOT STUDY AREAS BEARING RESULTS

Boring No.

Ultimate Bearing Capacity

(psf)

Estimated Bearing Pressure

(psf)

Factor of

Safety

BHMC-PS1 830 441 1.88

BHMC-PS2 553 434 1.27

BHMC-PS3 540 446 1.21

Bearing capacities computed using NAVFAC DM-7 Figure 11-5

Adequate bearing capacity (defined here as a factor of safety of 1.2 or greater against global bearing failure) was computed at all locations. Bearing capacity calculations are included in Appendix D.

LIMITATIONS

We have prepared this addendum report for the exclusive use of the USDA-NRCS in support of design of LaBranche East Marsh Creation (PO-75) PILOT project located in St. Charles Parish, Louisiana.

“Report Limitations and Guidelines for Use” included in the geotechnical report dated November 10, 2010 for the LaBranche East Marsh Creation (PO-75) project are applicable to this addendum.

Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted practices in the field of geotechnical engineering in this area at the time this report was prepared. No warranty or other conditions, expressed or implied, should be understood.

FEET

W E

N

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana

VICINITY MAP

Figure 1Reference: Topographic image taken from USGS, 24K Temp., Quads: La Branche, Luling, Hahnville and Laplace, P:\10\10883009\02\CAD\Vicinity Map.dwg\TAB:Layout1 modified on Nov 03, 2011 - 10:33am KMCJMP

STATE OUTLINE

SITE

SITE

Dated: 1992

Feet

W E

N

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana

BORING LOCATION PLAN

Figure 2

Legend

Reference: Aerial image taken from Google Earth Pro, Licensed to GeoEngineers, Inc., Dated 3/22/2010

P:\10\10883009\02\CAD\Boring Location Plan.dwg\TAB:Layout1 modified on Nov 03, 2011 - 10:15am KMCJMP

Borehole Location

BHBA-PS1-20

BHBA-PS2-20

BHMC-PS3-30

BHMC-PS2-30

BHMC-PS1-30

INTERSTATE 10

BHMC-PS3-30

BHBA-PS6-10

BHBA-PS5-10 BHBA-PS4-10

BHBA-PS3-10

C C'

B B'

A

A'

A A' Subsurface profile

BHMC-PS2-30 BHMC-PS1-30

BHMC-PS3-30

-10

-20

-30

-40

-10

-20

-30

-40

E

LE

V A

TI

O

N (F

T)

DISTANCE (FT)

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800

A A'

PEAT PEAT

ORGANIC CLAY ORGANIC CLAY

CLAY

CLAYEY SILT

SAND

SUBSURFACE PROFILE A-A'

Figure 3 Reference: Elevation data taken from USGS, State of Louisiana, 1999-2006, 1/9-Arc Second National Elevation Dataset, Quad Date: 8/2/2008

P :\1

0\

\0

2\ C

A D

\B or in g

Lo ca tio n

P la n.

dw g\

TA

B :L ay ou t2 m od ifi ed o n N ov

3,

- 1 0:

am

K M

C

JM

P

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana

-5

-10

-15

-20

-25

-30

-5

-10

-15

-20

-25

-30

E

LE

VA

TI

O N

(F T)

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400

DISTANCE (FT)

-5

-10

-15

-20

-25

-30

E

LE

VA

TI

O N

(F T)

0 100 200 300 400 500 600 700

DISTANCE (FT)

800 900

-5

-10

-15

-20

-25

-30

BHBA-PS3-10BHBA-PS4-10BHBA-PS5-10BHBA-PS6-10

VERY SOFT GRAY PEAT

VERY SOFT GRAY ORGANIC CLAY

VERY SOFT GRAY ORGANIC CLAY

VERY SOFT GRAY ORGANIC CLAY W/ 2" PEAT LAYER

VERY SOFT GRAY PEAT W/ 3" ORGANIC CLAY LAYER AT BOTTOM

VERY SOFT GRAY PEAT

VERY SOFT DARK GRAY PEAT

VERY SOFT DARK GRAY PEAT

MUDLINE @ EL -5.18 FEET NAVD88

ZERO 0 FEET TOP OF DECK

BHBA-PS1-20 BHBA-PS2-20

VERY SOFT LIGHT GRAY ORGANIC CLAY

VERY SOFT LIGHT GRAY ORGANIC CLAY

VERY SOFT LIGHT GRAY ORGANIC CLAY

VERY SOFT LIGHT GRAY ORGANIC CLAY

VERY SOFT DARK GRAY PEAT

DARK GRAY PEAT

VERY SOFT GRAY ORGANIC CLAY W/ 2" PEAT LAYER

VERY SOFT DARK GRAY PEAT

VERY SOFT DARK GRAY PEAT

VERY SOFT DARK GRAY PEAT

MUDLINE @ EL -4.73 FEET NAVD88

ZERO 0 FEET TOP OF DECK

10 10

MUDLINE

MUDLINE

C C'

B B'

ORGANIC CLAY & CLAY WITH ORGANIC MATTER

CLAY AND SILTY CLAY

PEAT & ORGANIC CLAY

CLAY & SILTY CLAY

PEAT & ORGANIC CLAY

SUBSURFACE PROFILE B-B' & C-C'

Figure 4Reference: Mudline elevations provided by NRCS, Dated 8/18/2011

P :\1

0\

\0

2\ C

A D

\B or in g

Lo ca tio n

P la n.

dw g\

TA

B :L ay ou t2 (2

) m od ifi ed o n

N ov

3,

- 1

0:

am K

M C

JM

P

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana

APPENDIX A

Soil Boring Logs

ADDITIONAL MATERIAL SYMBOLS

AC

Cement Concrete

Sampler Symbol Descriptions

GRAPH

Topsoil/ Forest Duff/Sod

Crushed Rock/ Quarry Spalls

Graphic Log Contact

TS

Blowcount is recorded for driven samplers as the number of blows required to advance sampler 12 inches (or distance noted). See exploration log for hammer weight and drop.

A "P" indicates sampler pushed using the weight of the drill rig.

Approximate location of soil strata change within a geologic soil unit

Distinct contact between soil strata or geologic units

Standard Penetration Test (SPT)

Piston

%F

AL

CA

CP

CS

DS

HA

MC

MD

OC

PM

PP

SA

UU

UC

VS

Direct-Push

Bulk or grab

NOTE: The reader must refer to the discussion in the report text and the logs of explorations for a proper understanding of subsurface conditions.

Descriptions on the logs apply only at the specific exploration locations and at the time the explorations were made; they are not warranted to be representative of subsurface conditions at other locations or times.

Perched water observed at time of exploration

Shelby tube

SYMBOLS

Laboratory / Field Tests Percent fines Atterberg limits Chemical analysis Laboratory compaction test Consolidation test Direct shear Hydrometer analysis Moisture content Moisture content and dry density Organic content Permeability or hydraulic conductivity Pocket penetrometer Sieve analysis Triaxial compression Unconfined compression Vane shear

Initial groundwater level observed at time of exploration

Measured groundwater level at time noted on log

TYPICAL

KEY TO EXPLORATION LOGS

CC

CR

Approximate location of soil strata change within a geologic soil unit

Asphalt Concrete

GC

PT

OH

CH

MH

OL

ORGANIC CLAYS AND SILTS OF

MEDIUM TO HIGH PLASTICITY

GM

GP

GW

DESCRIPTIONS

TYPICAL

LETTERGRAPH

(APPRECIABLE AMOUNT

OF FINES)

MORE THAN 50%

RETAINED ON NO.

200 SIEVE

SYMBOLSMAJOR DIVISIONS

WELL-GRADED SANDS, GRAVELLY

SANDSCLEAN SANDS

GRAVELS WITH

FINES

CLEAN

GRAVELS

HIGHLY ORGANIC SOILS

SILTS

AND

CLAYS

SILTS

AND

CLAYS

SAND

AND

SANDY

SOILS

GRAVEL

AND

GRAVELLY

SOILS

(LITTLE OR NO FINES)

FINE

GRAINED

SOILS

COARSE

GRAINED

SOILS

SW

MORE THAN 50%

OF COARSE

FRACTION

RETAINED ON NO.

4 SIEVE

CL

WELL-GRADED GRAVELS, GRAVEL -

SAND MIXTURES

POORLY-GRADED SANDS,

GRAVELLY SAND

INORGANIC SILTS, ROCK FLOUR,

CLAYEY SILTS WITH SLIGHT

PLASTICITY

INORGANIC SILTS, MICACEOUS OR

DIATOMACEOUS SILTY SOILS

SILTY GRAVELS, GRAVEL - SAND -

SILT MIXTURES

(APPRECIABLE AMOUNT

OF FINES)

SOIL CLASSIFICATION CHART

LIQUID LIMIT

GREATER THAN 50

LIQUID LIMIT

LESS THAN 50

SANDS WITH

FINES

SP

PEAT, HUMUS, SWAMP SOILS WITH

HIGH ORGANIC CONTENTS

INORGANIC CLAYS OF HIGH

PLASTICITY

(LITTLE OR NO FINES)

ORGANIC SILTS AND ORGANIC

SILTY CLAYS OF LOW PLASTICITY

INORGANIC CLAYS OF LOW TO

MEDIUM PLASTICITY, GRAVELLY

CLAYS, SANDY CLAYS, SILTY CLAYS,

LEAN CLAYS

CLAYEY SANDS, SAND - CLAY

MIXTURES

SILTY SANDS, SAND - SILT

MIXTURES

CLAYEY GRAVELS, GRAVEL - SAND -

CLAY MIXTURES

POORLY-GRADED GRAVELS,

GRAVEL - SAND MIXTURES

ML

SC

SM

NOTE: Multiple symbols are used to indicate borderline or dual soil classifications

MORE THAN 50%

PASSING NO. 200

SIEVE

MORE THAN 50%

OF COARSE

FRACTION

PASSING NO. 4

SIEVE

DESCRIPTIONSLETTER

Distinct contact between soil strata or geologic units

Material Description Contact

FIGURE A-1

9.5

OH

PT

OH

SP

CH

Zero (0) feet top of deck

Mudline @ El. -0.037 feet Dark gray organic clay with peat

Very soft dark gray peat (48.9% organic)

Very soft dark gray peat (70.2% organic) (*Fv @ 8' = 0.022 ksf)

Very soft dark gray peat

Soft dark gray peat (50.7% organic)

Very soft dark gray peat

Very soft dark gray peat with 3" organic clay

Very soft gray organic clay with silt lenses and 2" peat layer (2.4% organic) (*Fv @ 18' = 0.044 ksf)

Very soft gray organic clay

Loose gray fine sand with 2" clay layer

Very soft gray clay

Very soft gray clay

0.17

0.29

0.40

0.63

0.86

1.09

1.38

1.67

0.20

0.13

0.09

0.22

0.15

0.27

0.21

0.21

11.1

9.4

7.3

7.1

11.9

33.4

75.6

60.7

58.5

0.162

0.104

0.243

0.305

0.16

0.14

0.07

0.131

0.101

0.174

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

DAS

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Airboat-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 10.0" W90° 19' 21.4"

Geographic

NAVD88

See Figure A-1 for explanation of symbols.

N/A3.0

Specialized Environmental Resources, Inc.9/8/2011

End 9/8/2011

*Fv = Field Vane shear strength test result adjusted for material properties.

1Mudline elevations are surveyed and are correct; apparent excessive water depths may have resulted from advancing sampler through upper layer without encountering sufficient resistance to register as mudline penetration or soil sample to drill crew.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

-20

-25

-30

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-2

Log of Boring BHMC-PS1-30

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/2

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\

LA

B R

A N

C H

E E

A S

T M

A R

S H

C R

E A

TI

O

N B

O R

IN

G

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L A

B

7.5

OH

PT

OH

CH

OH

CL-ML

CH

Zero (0) feet top of deck

Mudline @ El. 0.084 feet Soft dark gray organic clay with peat (36.2% organic)

Very soft dark gray peat

Very soft dark gray peat with 2" organic clay layer (81% organic)

Very soft dark gray peat

Very soft dark gray peat

Very soft gray organic clay with 3" peat layer (30.7% organic) (*Fv @ 13' = 0.038 ksf)

Very soft gray organic clay

Very soft gray clay with 2" sand layer (3.43% organic)

Very soft gray organic clay with 2" dark gray peat layer

Very soft gray organic clay with silt lenses (*Fv @ 23' = 0.102 ksf)

Firm light gray clayey silt with 2" clay layer

Very soft light gray clay

0.06

0.17

0.29

0.40

0.63

0.75

0.98

1.38

0.05

0.07

0.12

0.07

0.07

0.06

0.06

0.16

17.8

10.4

10.6

26.7

46.4

61.9

71.8

0.043

0.201

0.279

0.176

0.142

0.104

0.072

0.137

0.194

0.234

0.23

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

DAS

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Airboat-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 06.2" W90° 19' 46.3"

Geographic

NAVD88

See Figure A-1 for explanation of symbols.

N/A3.1

Specialized Environmental Resources, Inc.9/8/2011

End 9/8/2011

*Fv = Field Vane shear strength test result adjusted for material properties.

1Mudline elevations are surveyed and are correct; apparent excessive water depths may have resulted from advancing sampler through upper layer without encountering sufficient resistance to register as mudline penetration or soil sample to drill crew.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

-20

-25

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-3

Log of Boring BHMC-PS2-30

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/2

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\

LA

B R

A N

C H

E E

A S

T M

A R

S H

C R

E A

TI

O

N B

O R

IN

G

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L

11.5

OH

PT

OH

Zero (0) feet top of deck

Mudline @ El. -0.362 feet Very soft dark gray organic clay with peat

Very soft dark gray peat (65.7% organic)

Very soft dark gray peat (*Fv @ 8' = 0.027 ksf)

Very soft dark gray organic clay with silt and organic matter (9.9% organic)

Very soft dark gray organic clay

Very soft dark gray organic clay (23.5% organic)

Very soft dark gray organic clay

Very soft gray organic clay (*Fv @ 18' = 0.05 ksf)

Very soft gray organic clay (8.2% organic)

Very soft gray organic clay with sand

Very soft gray organic clay with 3" peat layer

Soft gray organic clay

0.06

0.29

0.40

0.52

0.63

0.86

0.98

1.38

1.67

0.11

0.15

0.09

0.06

0.06

0.13

0.096

0.06

0.25

15.4

9.9

7.3

16.9

16.9

17.8

45.4

37.6

22.6

59.2

0.156

0.119

0.363

0.083

0.219

0.124

0.079

0.063

0.083

0.041

0.131

0.237

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

DAS

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Airboat-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 09.2" W90° 20' 01.7"

Geographic

NAVD88

See Figure A-1 for explanation of symbols.

N/A2.6

Specialized Environmental Resources, Inc.9/9/2011

End 9/9/2011

*Fv = Field Vane shear strength test result adjusted for material properties.

1Mudline elevations are surveyed and are correct; apparent excessive water depths may have resulted from advancing sampler through upper layer without encountering sufficient resistance to register as mudline penetration or soil sample to drill crew.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

-20

-25

-30

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-4

Log of Boring BHMC-PS3-30

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/2

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\

LA

B R

A N

C H

E E

A S

T M

A R

S H

C R

E A

TI

O

N B

O R

IN

G

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L

PT

OH

PT

Zero (0) feet top of deck

Mudline @ El. -5.18 feet NAVD88 Very soft dark gray peat

Very soft dark gray peat

Very soft dark gray peat

Very soft gray peat

Very soft gray peat with 3" organic clay layer at bottom

Very soft gray organic clay with 2" peat layer

Gray organic clay

Very soft gray organic clay

Very soft gray organic clay

Very soft gray peat

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

DAS

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Pontoon-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 20.1" W90° 19' 43.4"

Geographic

NAVD88

See Figure A-1 for explanation of symbols.

N/A8.8

Specialized Environmental Resources, Inc.8/25/2011

End 8/25/2011

1BHBA-PS1 and -PS2 profiles based on visual and manual classification only.

2Mudline elevations are surveyed and are correct; apparent excessive water depths may have resulted from advancing sampler through upper layer without encountering sufficient resistance to register as mudline penetration or soil sample to drill crew.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

-20

-25

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-5

Log of Boring BHBA-PS1-20

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/2

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\ G

IN

T

LA

B

R A

N C

H E

B H

B A

P

S 1-

A

N D

P S

2-

L O

G S

\L A

B R

A N

C H

E

B H

B A

P

S 1-

A

N D

P S

2-

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L

PT

OH

PT

OH

Zero (0) feet top of deck

Mudline @ El. -4.73 feet NAVD88 Very soft dark gray peat

Very soft dark gray peat

Very soft dark gray peat

Very soft gray organic clay with 2" peat layer

Dark gray peat

Very soft dark gray peat

Very soft light gray organic clay

Very soft light gray organic clay

Very soft light gray organic clay

Very soft light gray organic clay

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

DAS

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Pontoon-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 19.7" W90° 19' 38.9"

Geographic

NAVD88

See Figure A-1 for explanation of symbols.

N/A7.3

Specialized Environmental Resources, Inc.8/25/2011

End 8/25/2011

1BHBA-PS1 and -PS2 profiles based on visual and manual classification only.

2Mudline elevations are surveyed and are correct; apparent excessive water depths may have resulted from advancing sampler through upper layer without encountering sufficient resistance to register as mudline penetration or soil sample to drill crew.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

-20

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-6

Log of Boring BHBA-PS2-20

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/2

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\ G

IN

T

LA

B

R A

N C

H E

B H

B A

P

S 1-

A

N D

P S

2-

L O

G S

\L A

B R

A N

C H

E

B H

B A

P

S 1-

A

N D

P S

2-

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L

PT

OH

CH

CL

Zero (0) feet top of deck

Mudline @ El. -9.73 feet NAVD88

Very soft dark gray peat

Very soft dark gray peat

Very soft gray organic clay

Very soft gray clay

Very soft gray clay

Very soft gray silty clay

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

RMB

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Pontoon-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 40.1" W90° 19' 37.8"

Geographic

NAVD88

21.5

See Figure A-1 for explanation of symbols.

N/A1.8

Specialized Environmental Resources, Inc.10/14/2011

End 10/14/2011

*Indicates a remold was used for strength testing.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-7

Log of Boring BHBA-PS3-10

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/3

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\ G

IN

T

LA

B

R A

N C

H E

B H

B A

P

S 3-

T

H R

O U

G H

P S

6-

L O

G S

\L A

B R

A N

C H

E

B H

B A

P

S 3-

T

H R

O U

G H

P S

6-

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L

PT

OH

PT

OH

CH

CL

Zero (0) feet top of depth

Mudline @ El. -9.48 feet NAVD88 Very soft dark gray peat

Very soft gray organic clay

Very soft dark gray peat

Very soft gray organic clay

Very soft gray clay

Very soft gray clay

Very soft gray silty clay

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

KMB

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Pontoon-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 40.2" W90° 19' 42.3"

Geographic

NAVD88

21.5

See Figure A-1 for explanation of symbols.

N/A2.0

Specialized Environmental Resources, Inc.10/14/2011

End 10/14/2011

*Indicates a remold was used for strength testing.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-8

Log of Boring BHBA-PS4-10

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/2

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\ G

IN

T

LA

B

R A

N C

H E

B H

B A

P

S 3-

T

H R

O U

G H

P S

6-

L O

G S

\L A

B R

A N

C H

E

B H

B A

P

S 3-

T

H R

O U

G H

P S

6-

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L

CH

Zero (0) feet top of deck

Mudline @ El. -9.83 feet NAVD88 Very soft gray clay

Very soft gray clay with organic matter

Very soft dark gray and gray clay with peat lenses

Very soft gray clay

Very soft gray clay

Soft gray clay

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

RMB

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Pontoon-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 40.2" W90° 19' 46.9"

Geographic

NAVD88

21.5

See Figure A-1 for explanation of symbols.

N/A1.7

Specialized Environmental Resources, Inc.10/14/2011

End 10/14/2011

*Indicates a remold was used for strength testing.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-9

Log of Boring BHBA-PS5-10

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/2

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\ G

IN

T

LA

B

R A

N C

H E

B H

B A

P

S 3-

T

H R

O U

G H

P S

6-

L O

G S

\L A

B R

A N

C H

E

B H

B A

P

S 3-

T

H R

O U

G H

P S

6-

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L

OH

CH

Zero (0) feet top of deck

Mudline @ El. -9.86 feet NAVD88 Very soft brown organic clay

Very soft brown organic clay

Very soft gray clay with organic matter

Very soft gray clay

Very soft gray clay

Total Depth (ft)

Hammer Data

System Datum

Start Checked By Logged By

JP

Drilling MethodDrilled

Notes:

RMB

Surface Elevation (ft) Vertical Datum

Wet RotaryDriller

Groundwater Depth to Water (ft)Date Measured

Pontoon-Mounted Drill Rig

Elevation (ft)

Drilling Equipment

Latitude Longitude

N30° 03' 40.2" W90° 19' 51.4"

Geographic

NAVD88

21.5

See Figure A-1 for explanation of symbols.

N/A1.6

Specialized Environmental Resources, Inc.10/14/2011

End 10/14/2011

*Indicates a remold was used for strength testing.

FIELD DATA

W at er L ev el

B lo w s/ fo ot

D ep th (f ee t)

R ec ov er ed (i n)

In te rv al

C ol le ct ed S am pl e

E le va tio n (fe et

-5

-10

-15

S am pl e

N am e

G ra ph ic

L og

G ro up C la ss ifi ca tio n MATERIAL

DESCRIPTION

Sheet 1 of 1 Figure A-10

Log of Boring BHBA-PS6-10

Project Location:

Project:

Project Number:

LaBranche East Marsh Creation Project (PO-75) St. Charles Parish, Louisiana 10883-009-02

LABORATORY DATA

W at er C on te nt

P la st ic ity In de x

(P I), Li qu id Li m it

(L L)

S tra in

P as si ng

N o.

S ie ve

C on fin in g P re ss ur e

(K S

F)

C om pr es si ve

S tre ng th

(T S

F)

D ry

D en si ty

(p cf

M in iV an e S he ar

S tre ng th

(K S

F)

B at on R ou ge

D at e:

/2

/1

P at h:

P

:\1 0\

\0 2\

G

IN

T\ G

IN

T

LA

B

R A

N C

H E

B H

B A

P

S 3-

T

H R

O U

G H

P S

6-

L O

G S

\L A

B R

A N

C H

E

B H

B A

P

S 3-

T

H R

O U

G H

P S

6-

L O

G S

.G P

J D

B Te m pl at e/

Li bT em pl at e:

G E

O E

N G

IN

E

E R

S 8.

G D

T/ G

E I8

_G E

O

TE

C H

_L

APPENDIX B

Laboratory Data

Consolidation Test Test Results

0.00

10.00

20.00

30.00

40.00

50.00

60.00

St ra in

Before After Liquid Limits: 633 Test Date: 03 Oct 2011

789.42 216.03 Plastic Limits: 281

Dry Density (pcf): 7.14 26.38 Plasticity Index (%): 372 Saturation (%): 96.88 122.16 Void Ratio: 13.5849 3.2102 Specific Gravity: 1.673 Measured Sample Description: Peat (PT) Project Number: 10883-009-02 Depth: 11-13 feet Remarks:

Sample Number: Boring Number: BHMC-PS1-3 Project: USDA/NRCS LaBranche East Marsh Creation PILOT (PO-75) Client: NRCS Location: St. Charles Parish, LA

Moisture (%):

70.00

80.00

0.010 0.100 1.000 10.000

Pressure (tsf)

Consolidation Test Test Results

4.0000

6.0000

8.0000

10.0000

12.0000

14.0000

Vo id

R at io

Before After Liquid Limits: 633 Test Date: 03 Oct 2011

789.42 216.03 Plastic Limits: 281

Dry Density (pcf): 7.14 26.38 Plasticity Index (%): 372 Saturation (%): 96.88 122.16 Void Ratio: 13.5849 3.2102 Specific Gravity: 1.673 Measured Soil Description: Peat (PT) Project Number: 10883-009-02 Depth: 11-13 feet Remarks:

Sample Number: Boring Number: BHMC-PS1-3 Project: USDA/NRCS LaBranche East Marsh Creation PILOT (PO-75) Client: NRCS Location: St. Charles Parish, LA

Moisture (%):

2.0000

4.0000

0.01 0.10 1.00 10.00

Pressure (tsf)

Consolidation Test Test Results

100.0000

200.0000

300.0000

400.0000

500.0000

600.0000 t9

C v

(f t2 /y ea r)

Before After Liquid Limits: 633 Test Date: 03 Oct 2011

789.42 216.03 Plastic Limits: 281

Dry Density (pcf): 7.14 26.38 Plasticity Index (%): 372 Saturation (%): 96.88 122.16 Void Ratio: 13.5849 3.2102 Specific Gravity: 1.673 Measured Soil Description: Peat (PT) Project Number: 10883-009-02 Depth: 11-13 feet Remarks:

Sample Number: Boring Number: BHMC-PS1-3 Project: USDA/NRCS LaBranche East Marsh Creation PILOT (PO-75) Client: NRCS Location: St. Charles Parish, LA

Moisture (%):

0.0000

100.0000

0.01 0.10 1.00 10.00 Pressure (tsf) t90 Cv

Consolidation Test Test Results

10.0000

20.0000

30.0000

40.0000

50.0000

60.0000

70.0000

80.0000 t5

C v

(f t2 /y ea r)

Before After Liquid Limits: 633 Test Date: 03 Oct 2011

789.42 216.03 Plastic Limits: 281

Dry Density (pcf): 7.14 26.38 Plasticity Index (%): 372 Saturation (%): 96.88 122.16 Void Ratio: 13.5849 3.2102 Specific Gravity: 1.673 Measured Soil Description: Peat (PT) Project Number: 10883-009-02 Depth: 11-13 feet Remarks:

Sample Number: Boring Number: BHMC-PS1-3 Project: USDA/NRCS LaBranche East Marsh Creation PILOT (PO-75) Client: NRCS Location: St. Charles Parish, LA

Moisture (%):

0.0000

10.0000

0.01 0.10 1.00 10.00

Pressure (tsf) t50 Cv

Project: USDA/NRCS LaBranche East Marsh Creation PILOT (PO-75) Project Number: 10883-009-02 Location: St. Charles Parish, LA Job Number:

Sample Number: Sample Description:

Boring Number: BHMC-PS1-30 Peat (PT) Depth: 11-13 feet Remarks: Test Number:

Sample Type: Undisturbed Test Date: 03 Oct 2011

Load Sequence

Cummulative Change in

Height Specimen

Height Height of

Void Vertical Strain Void Ratio t90 Fitting Time t50 Fitting Time t90 Cv t50 Cv

(tsf) (in) (in) (in) (%) (min) (min) (ft2/year) (ft2/year)

0.000 0.0000 0.7500 0.6987 0.00 13.6066 0.000 0.000 0.000 0.000

0.031 0.0277 0.7223 0.6710 3.69 13.0671 6.703 4.438 60.226 21.133

0.063 0.0577 0.6923 0.6410 7.69 12.4828 0.701 33.886 529.326 2.543

0.125 0.0996 0.6504 0.5991 13.28 11.6668 0.804 33.649 407.186 2.260

0.250 0.1742 0.5758 0.5245 23.23 10.2139 0.794 17.164 323.226 3.472

0.500 0.2631 0.4869 0.4356 35.08 8.4826 0.971 0.942 189.003 45.265

1.000 0.3577 0.3923 0.3410 47.69 6.6402 1.663 4.678 71.628 5.914

0.250 0.3300 0.4200 0.3687 44.00 7.1797 0.000 0.000 0.000 0.000

0.063 0.3018 0.4482 0.3969 40.24 7.7289 0.000 0.000 0.000 0.000

0.250 0.3124 0.4376 0.3863 41.65 7.5224 0.978 0.480 151.579 71.665

0.500 0.3312 0.4188 0.3675 44.16 7.1563 1.307 1.405 103.863 22.446

1.000 0.3607 0.3893 0.3380 48.09 6.5818 1.499 0.955 78.223 28.531

2.000 0.4277 0.3223 0.2710 57.03 5.2769 3.461 4.719 23.225 3.957

4.000 0.4810 0.2690 0.2177 64.13 4.2389 13.798 4.845 4.058 2.685

8.000 0.5335 0.2165 0.1652 71.13 3.2164 10.770 6.655 3.368 1.266

Predicted value indicated with *

Consolidation Test Results Summary

Index

Project: USDA/NRCS LaBranche East Marsh Creation PILOT (PO-75) Project Number:10883-009-02 Location: St. Charles Parish, LA Job Number: Test Date: 03 Oct 2011

Sample Number: Sample Description:

Boring Number: BHMC-PS1-30 Peat (PT) Depth: 11-13 feet Remarks:

Sample Type: Undisturbed

Test Number:

Liquid Limit: 633.0000 Initial Void Ratio: 13.5849 Initial Height (in): 0.7500 Plastic Limit: 281.0000 Plasticity Index (%): 372.0000 Initial Diameter (in): 2.5000 Specific Gravity: 1.6730 Weight of Ring (g): 106.7100

Measured

Void Ratio Saturation (%)

Dry Density (pcf)

45.69 29.92 22.62

Moist Weight + Container (g) Dry Soil + Container (g) Weight of Container (g) Moisture Content (%) 216.03

108.92 36.53 27.36

789.42

Consolidation Test Consolidation Specimen Information

Parameters Final SpecimenInitial Specimen

3.2102 122.16 26.38

13.5849 96.88 7.14

Project: USDA/NRCS LaBranche East Marsh Creation PILOT (PO-75) Project Number:10883-009-02

Job Number: Test Date: 03 Oct 2011

Test Number:

Sample Number: Soil Description:

Boring Number: BHMC-PS1-30 Peat (PT) Depth: 11-13 feet Remarks:

Sample Type: Undisturbed

Axial Strain Void Ratio

0 0.0000 13.5849 1 0.6000 13.4974 2 0.8133 13.4662 3 0.9600 13.4448 4 1.0400 13.4332 5 1.0800 13.4273 6 1.0933 13.4254 7 1.1333 13.4196 8 1.1600 13.4157 9 1.2800 13.3982

10 1.4133 13.3787 11 1.5600 13.3573 12 1.8667 13.3126 13 1.9200 13.3048 14 2.0800 13.2815 15 2.1333 13.2737 16 2.2400 13.2582 17 2.3200 13.2465 18 2.7200 13.1882 19 2.8133 13.1745 20 2.9200 13.1590 21 2.9733 13.1512 22 3.0133 13.1454 23 3.0533 13.1395 24 3.0933 13.1337 25 3.1200 13.1298 26 3.1600 13.1240 27 3.1867 13.1201 28 3.2267 13.1143 29 3.2400 13.1123 30 3.2667 13.1084 31 3.2800 13.1065 32 3.3067 13.1026 33 3.3200 13.1006 34 3.3333 13.0987 35 3.3600 13.0948 36 3.3733 13.0929 37 3.3733 13.0929 38 3.3867 13.0909 39 3.4133 13.0870 40 3.4133 13.0870 41 3.4267 13.0851 42 3.4400 13.0831 43 3 4533 13 0812

Index

Consolidation Test Results (Sequence 1) Load 0.031 tsf

Consolidation Test Results (Sequence 1) Load 0.031 tsf

0.0045

Settlement (in)

00:00:01 0.0054 00:00:00 0.0009 0.0000

Time Displacement (in)

00:00:04 0.0087 0.0078 00:00:05 0.0090 0.0081

00:00:02 0.0070 0.0061 00:00:03 0.0081 0.0072

00:00:15 0.0096 0.0087 00:00:30 0.0105 0.0096

00:00:06 0.0091 0.0082 00:00:12 0.0094 0.0085

00:04:01 0.0149 0.0140 00:05:01 0.0153 0.0144

00:01:00 0.0115 0.0106 00:02:00 0.0126 0.0117

00:15:02 0.0177 0.0168 00:20:03 0.0183 0.0174

00:08:01 0.0165 0.0156 00:10:01 0.0169 0.0160

01:30:07 0.0228 0.0219 02:00:08 0.0232 0.0223

00:40:05 0.0213 0.0204 01:00:06 0.0220 0.0211

03:30:13 0.0241 0.0232 04:00:14 0.0243 0.0234

02:30:10 0.0235 0.0226 03:00:11 0.0238 0.0229

05:30:18 0.0251 0.0242 06:00:20 0.0252 0.0243

04:30:15 0.0246 0.0237 05:00:17 0.0248 0.0239

07:30:24 0.0257 0.0248 08:00:25 0.0258 0.0249

06:30:21 0.0254 0.0245 07:00:22 0.0255 0.0246

09:30:29 0.0262 0.0253 10:00:31 0.0262 0.0253

08:30:27 0.0259 0.0250 09:00:28 0.0261 0.0252

11:30:35 0.0265 0.0256 12:00:36 0.0266 0.0257

10:30:32 0.0263 0.0254 11:00:34 0.0265 0.0256

12:30:38 0.0267 0.0258 13:00:39 0 0268 0 0259

0.0052

0.0102

0.0152

0.0202

0.0252

0.0302

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0

D is pl ac em en t ( in

Time (Square Root Minute)

Consolidation Graph (Squareroot Time)

Load1Sqr Line1 Line2 Point1

0.0086

0.0136

0.0186

0.0236

0.0286

0.10 1.00 10.00 100.00 1000.00

D is pl ac em en t ( in

Time (Logarithmic Minute)

Consolidation Graph (Logarithmic Time)

Load1Log Line 1 Line 2 Line 3 Point 1 Point 2 Point 3

43 3.4533 13.0812 44 3.4533 13.0812 45 3.4667 13.0793 46 3.4800 13.0773 47 3.4800 13.0773 48 3.4933 13.0754 49 3.5067 13.0734 50 3.5200 13.0715 51 3.5333 13.0695 52 3.5333 13.0695 53 3.5467 13.0676 54 3.5600 13.0656 55 3.5733 13.0637 56 3.5867 13.0617 57 3.6400 13.0540 58 3.6533 13.0520 59 3.6800 13.0481 60 3.6933 13.0462 61 3.6933 13.0462

Tested By: Checked By:

13:30:41 0.0268 0.0259 14:00:42 0.0269 0.0260

13:00:39 0.0268 0.0259

15:30:46 0.0271 0.0262 16:00:48 0.0272 0.0263

14:30:43 0.0270 0.0261 15:00:45 0.0270 0.0261

17:30:52 0.0274 0.0265 18:00:53 0.0275 0.0266

16:30:49 0.0273 0.0264 17:00:50 0.0274 0.0265

19:30:57 0.0278 0.0269 20:00:59 0.0282 0.0273

18:30:55 0.0276 0.0267 19:00:56 0.0277 0.0268

21:31:03 0.0286 0.0277 21:34:52 0.0286 0.0277

20:31:00 0.0283 0.0274 21:01:02 0.0285 0.0276

Project: USDA/NRCS LaBranche East Marsh Creation PILOT (PO-75) Project Number: 10883-009-02 Location: St. Charles Parish, LA Job Number: Test Date: 03 Oct 2011

Test Number:

Sample Number: Soil Description:

Boring Number: BHMC-PS1-30 Peat (PT) Depth: 11-13 feet Remarks:

Sample Type: Undisturbed

Axial Strain Void Ratio

0 3.6933 13.0462 1 3.4800 13.0773 2 3.9867 13.0034 3 4.3733 12.9470 4 4.5600 12.9198 5 4.6133 12.9120 6 4.6533 12.9062 7 4.8000 12.8848 8 4.8400 12.8790 9 4.9467 12.8634 10 5.0400 12.8498 11 5.1333 12.8362 12 5.2400 12.8206 13 5.2800 12.8148 14 5.3600 12.8031 15 5.4000 12.7973 16 5.4800 12.7856 17 5.5333 12.7778 18 5.6667 12.7584 19 5.7600 12.7448 20 5.9333 12.7195 21 6.0133 12.7078 22 6.1200 12.6923 23 6.1733 12.6845 24 6.2267 12.6767 25 6.2533 12.6728 26 6.2933 12.6670 27 6.3333 12.6612 28 6.3733 12.6553 29 6.4000 12.6514 30 6.4267 12.6475 31 6.4667 12.6417 32 6.4933 12.6378 33 6.5200 12.6339 34 6.5333 12.6320 35 6.5467 12.6300 36 6.5733 12.6261 37 6.6000 12.6223 38 6.6133 12.6203 39 6.6267 12.6184 40 6.6533 12.6145 41 6.6667 12.6125 42 6.6800 12.6106 43 6.6933 12.6086 44 6.7067 12.6067 45 6.7600 12.5989 46 6.7733 12.5970 47 6.7733 12.5970 48 6.7867 12.5950 49 6.8133 12.5911 50 6.8267 12.5892 51 6.8400 12.5873 52 6.8533 12.5853 53 6.8667 12.5834 54 6.8667 12.5834 55 6.8800 12.5814 56 6.8933 12.5795 57 6.9067 12.5775 58 6.9200 12.5756 59 6.9333 12.5736 60 6.9467 12.5717 61 6 9600 12 5698

Index

Consolidation Test Results (Sequence 2) Load 0.063 tsf

Consolidation Test Results (Sequence 2) Load 0.063 tsf

00:00:01 0.0270 0.0261

(in)Time

00:00:00 0.0286 0.0277

Settlement (in)

Displacement

00:00:04 0.0351 0.0342 00:00:05 0.0355 0.0346

00:00:02 0.0308 0.0299 00:00:03 0.0337 0.0328

00:00:15 0.0372 0.0363 00:00:30 0.0380 0.0371

00:00:06 0.0358 0.0349 00:00:12 0.0369 0.0360

00:04:00 0.0402 0.0393 00:05:00 0.0405 0.0396

00:01:00 0.0387 0.0378 00:02:00 0.0394 0.0385

00:15:01 0.0420 0.0411 00:20:01 0.0424 0.0415

00:08:00 0.0411 0.0402 00:10:00 0.0414 0.0405

01:30:04 0.0454 0.0445 02:00:08 0.0460 0.0451

00:40:02 0.0434 0.0425 01:00:03 0.0441 0.0432

03:30:13 0.0476 0.0467 04:00:15 0.0478 0.0469

02:30:11 0.0468 0.0459 03:00:12 0.0472 0.0463

05:30:19 0.0487 0.0478 06:00:20 0.0489 0.0480

04:30:16 0.0481 0.0472 05:00:18 0.0484 0.0475

07:30:24 0.0496 0.0487 08:00:26 0.0498 0.0489

06:30:22 0.0491 0.0482 07:00:23 0.0494 0.0485

09:30:30 0.0502 0.0493 10:00:31 0.0504 0.0495

08:30:27 0.0499 0.0490 09:00:29 0.0500 0.0491

11:30:36 0.0508 0.0499 12:00:37 0.0509 0.0500

10:30:33 0.0505 0.0496 11:00:34 0.0506 0.0497

13:30:41 0.0512 0.0503 14:00:42 0.0516 0.0507

12:30:38 0.0510 0.0501 13:00:40 0.0511 0.0502

15:30:47 0.0518 0.0509 16:00:48 0.0520 0.0511

14:30:44 0.0517 0.0508 15:00:45 0.0517 0.0508

17:30:52 0.0523 0.0514 18:00:53 0.0524 0.0515

16:30:49 0.0521 0.0512 17:00:51 0.0522 0.0513

19:30:58 0.0526 0.0517 20:00:59 0.0527 0.0518

18:30:55 0.0524 0.0515 19:00:56 0.0525 0.0516

21:31:03 0.0530 0.0521 22:01:04 0 0531 0 0522

20:31:00 0.0528 0.0519 21:01:02 0.0529 0.0520

0.0268

0.0318

0.0368

0.0418

0.0468

0.0518

0.0568

0.0618

0.0 10.0 20.0 30.0 40.0 50.0

D isp la ce m en t ( in

Time (Square Root Minute)

Consolidation Graph (Squareroot Time)

Load2Sqr Line1 Line2 Point1

0.0356

0.0406

0.0456

0.0506

0.0556

0.0606

0.10 1.00 10.00 100.00 1000.00

D isp la ce m en t ( in

Time (Logarithmic Minute)

Consolidation Graph (Logarithmic Time)

Load2Log Line 1 Line 2 Line 3 Point 1 Point 2 Point 3

61 6.9600 12.5698 62 6.9733 12.5678 63 6.9867 12.5659 64 6.9867 12.5659 65 7.1867 12.5367 66 7.2000 12.5347 67 7.2267 12.5309 68 7.2400 12.5289 69 7.2533 12.5270 70 7.2667 12.5250 71 7.2933 12.5211 72 7.3067 12.5192 73 7.3067 12.5192 74 7.3200 12.5172 75 7.3333 12.5153 76 7.3600 12.5114 77 7.3733 12.5095 78 7.3867 12.5075 79 7.4000 12.5056 80 7.4533 12.4978 81 7.4667 12.4959 82 7.4667 12.4959 83 7.4800 12.4939 84 7.4800 12.4939 85 7.5067 12.4900 86 7.5067 12.4900 87 7.5067 12.4900 88 7.5200 12.4881 89 7.5200 12.4881 90 7.5333 12.4861 91 7.5467 12.4842 92 7.5600 12.4822 93 7.5600 12.4822 94 7.5733 12.4803 95 7.5733 12.4803 96 7.5867 12.4784 97 7.5867 12.4784 98 7.6000 12.4764…