25B5002 - Appendix G- Site Characterization Report - AOC Part 4.pdf

APPENDIX B

2007 EXPLORATIONS

Virginia Port Authority November 9, 2009 (Project No. 3582.006)

INTRODUCTION

This appendix includes data from vibracore sampling conducted by Alpine AquaSurvey, Inc., and mini-CPT (mCPT) soundings conducted by ConeTec, Inc. under contract to S&ME.

S&ME was contracted to the USACE. The 2007 exploration program included a total of 105 mCPT soundings and 132 vibracores conducted within the potential sand resource areas of Thimble Shoal Channel, Newport News Channel and Anchorages, and Atlantic Ocean Channel between October and December of 2008. Of those explorations, 53 mCPTs and 28 vibracore explorations were completed in the Atlantic Ocean Channel area. This appendix only contains logs and data from explorations conducted at the Atlantic Ocean Channel site. A summary of the explorations is provided in Table B-1.

Fifty-three mCPT soundings were completed using an electronic mini-cone CPT system with a 2 cm2 area and net area ratio of approximately 0.60. The mCPT recorded tip resistance, sleeve resistance, friction ratio, and depth. The mCPT did not record pore pressure data. The mCPTs were advanced to a maximum depth of 32 feet or practical refusal. ConeTec conducted the initial mCPT processing and provided those data to S&ME. S&ME prepared the mCPT logs included in this appendix. Fugro obtained the mCPT data from S&ME and performed additional analyses (e.g. estimated fines content, relative density, etc.) and incorporated the data into the project GIS database and geophysical interpretation software as described in this report.

Twenty-eight vibracore explorations were conducted using a Rossfelder VT-6 Vibracorer with a 20-foot-long, core barrel. This data provides soil samples and continuous soil profiles of subsurface sediments which aids in characterizing stratigraphic variations.

Laboratory testing was performed by S&ME on the vibacore samples. Laboratory test results include moisture content, Atterberg limits, and gradation analysis. A test result summary table, grain size curves, and plasticity charts are included in this appendix.

For clarity purposes, the exploration identification nomenclature from the original report has been standardized in this report. For our standardized exploration identifiers, we have retained the original exploration number (e.g. 4), but have altered the prefix to include the year of the exploration and the type of exploration (e.g. 07V-4), where “V” represents a vibracore exploration and “BC” represents a miniature cone penetrometer test. The logs presented in this appendix contain the original exploration identification, while Table B-1, along with charts and figures presented in this report use Fugro’s standardized nomenclature.

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Table B-1. 2007 Mini-CPT and Vibracore Explorations

Coordinates Virginia State Plane, South Zone, NAD 83, Feet Exploration1 Type

Completion Date

Completion Depth (feet)

Northing Easting

Mudline Elevation

(feet)

Elevation Datum

Location With

Respect to

Channel2

07BC-1 CPT 11/12/2007 13.8 3504851 12234832 -61.4 MLLW Outside 07BC-2 CPT 11/12/2007 30.0 3503475 12237575 -61.2 MLLW Within 07BC-3 CPT 11/12/2007 15.3 3501265 12239758 -61.9 MLLW Within 07BC-4 CPT 11/12/2007 30.0 3500192 12238553 -59.7 MLLW Outside 07BC-5 CPT 11/12/2007 29.8 3502108 12244983 -40.5 MLLW Outside 07BC-6 CPT 11/12/2007 19.3 3497982 12240630 -58.3 MLLW Outside 07BC-7 CPT 11/12/2007 30.0 3496601 12243477 -57.0 MLLW Within 07BC-8 CPT 11/12/2007 30.0 3494455 12245619 -57.8 MLLW Within 07BC-9 CPT 11/12/2007 22.1 3492660 12247968 -54.5 MLLW Adjacent 07BC-10 CPT 11/29/2007 21.2 3491871 12247318 -54.7 MLLW Within 07BC-11 CPT 11/29/2007 29.9 3492001 12251717 -49.0 MLLW Outside 07BC-12 CPT 11/12/2007 29.9 3490471 12250098 -55.2 MLLW Adjacent 07BC-13 CPT 11/29/2007 9.4 3489380 12248942 -52.5 MLLW Outside 07BC-14 CPT 11/12/2007 28.1 3489117 12252999 -50.9 MLLW Outside 07BC-15 CPT 11/29/2007 10.8 3487569 12251321 -56.3 MLLW Within 07BC-16 CPT 11/12/2007 30.0 3483529 12251229 -50.1 MLLW Outside 07BC-17 CPT 11/12/2007 20.5 3488755 12257651 -45.9 MLLW Outside 07BC-18 CPT 11/12/2007 19.2 3485991 12256065 -50.9 MLLW Within 07BC-19 CPT 11/12/2007 15.3 3484424 12255084 -52.9 MLLW Outside 07BC-20 CPT 11/13/2007 13.9 3482801 12261310 -54.1 MLLW Within 07BC-21 CPT 11/13/2007 20.8 3481438 12260426 -52.9 MLLW Outside 07BC-22 CPT 11/13/2007 19.1 3480045 12259703 -54.5 MLLW Outside 07BC-23 CPT 11/13/2007 16.1 3481798 12264153 -55.3 MLLW Outside 07BC-24 CPT 11/13/2007 17.1 3480792 12263553 -55.4 MLLW Within 07BC-25 CPT 11/13/2007 17.2 3479190 12267395 -54.5 MLLW Within 07BC-26 CPT 11/13/2007 16.4 3477402 12265004 -54.6 MLLW Outside 07BC-27 CPT 11/14/2007 29.6 3479332 12269528 -50.8 MLLW Outside 07BC-28 CPT 11/14/2007 12.4 3474529 12266733 -55.7 MLLW Outside 07BC-29 CPT 11/14/2007 14.8 3473978 12269970 -54.6 MLLW Outside 07BC-30 CPT 11/14/2007 18.9 3477214 12275315 -51.6 MLLW Outside 07BC-31 CPT 11/14/2007 18.0 3474823 12273864 -54.3 MLLW Within 07BC-32 CPT 11/14/2007 16.6 3472889 12276177 -58.8 MLLW Within 07BC-33 CPT 11/14/2007 10.3 3471924 12275643 -58.0 MLLW Outside 07BC-34 CPT 11/14/2007 19.4 3471852 12279042 -62.5 MLLW Outside 07BC-35 CPT 11/14/2007 19.7 3469938 12277982 -59.3 MLLW Outside 07BC-70 CPT 11/29/2007 30.0 3497718 12244712 -58.6 MLLW Outside 07BC-71 CPT 11/29/2007 10.1 3501203 12235381 -54.8 MLLW Outside 07BC-72 CPT 12/7/2007 20.1 3495218 12237799 -50.0 MLLW Outside 07BC-73 CPT 12/7/2007 15.8 3490971 12241966 -51.6 MLLW Outside 07BC-74 CPT 12/7/2007 14.1 3496721 12247988 -48.7 MLLW Outside 07BC-75 CPT 11/29/2007 10.8 3489355 12248908 -51.6 MLLW Outside 07BC-76 CPT 12/7/2007 29.9 3493462 12253311 -37.8 MLLW Outside

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Coordinates Virginia State Plane, South Zone, NAD 83, Feet Exploration1 Type

Completion Date

Completion Depth (feet)

Northing Easting

Mudline Elevation

(feet)

Elevation Datum

Location With

Respect to

Channel2

07BC-77 CPT 11/29/2007 28.8 3492396 12252078 -45.7 MLLW Outside 07BC-78 CPT 12/7/2007 32.0 3500657 12243375 -54.3 MLLW Outside 07BC-79 CPT 12/7/2007 19.8 3483889 12258359 -54.8 MLLW Within 07BC-80 CPT 12/7/2007 20.7 3485714 12262813 -52.6 MLLW Outside 07BC-81 CPT 12/7/2007 17.3 3477063 12261277 -53.8 MLLW Outside 07BC-82 CPT 12/7/2007 23.3 3483567 12268676 -53.3 MLLW Outside 07BC-83 CPT 12/7/2007 12.6 3476257 12271305 -54.9 MLLW Within 07BC-84 CPT 12/7/2007 15.7 3471469 12271926 -52.6 MLLW Outside 07BC-85 CPT 12/7/2007 32.7 3495474 12242325 -54.5 MLLW Outside 07BC-86 CPT 12/7/2007 17.2 3468985 12274006 -56.8 MLLW Outside 07BC-87 CPT 12/7/2007 14.8 3475148 12277577 -53.5 MLLW Outside

07V-1 Vibracore 11/8/2007 17.0 3507146 12237206 -61.8 MLLW Outside 07V-2 Vibracore 11/1/2007 19.4 3505995 12235943 -60.6 MLLW Outside 07V-3 Vibracore 11/1/2007 14.5 3505217 12235160 -58.7 MLLW Outside 07V-4 Vibracore 11/1/2007 16.2 3504851 12234799 -57.3 MLLW Outside 07V-5 Vibracore 11/1/2007 13.5 3502562 12232426 -50.4 MLLW Outside 07V-6 Vibracore 11/8/2007 20.4 3505721 12240023 -56.6 MLLW Outside 07V-7 Vibracore 11/8/2007 20.4 3504133 12238394 -62.4 MLLW Outside 07V-10 Vibracore 11/1/2007 15.0 3500062 12234047 -48.5 MLLW Outside 07V-12 Vibracore 11/9/2007 10.2 3503206 12241771 -55.9 MLLW Outside 07V-13 Vibracore 11/8/2007 13.0 3502408 12240876 -61.0 MLLW Outside 07V-21 Vibracore 11/9/2007 7.0 3498456 12240994 -58.7 MLLW Within 07V-39 Vibracore 11/18/2007 18.4 3490020 12245285 -52.4 MLLW Outside 07V-40 Vibracore 11/18/2007 5.0 3493469 12253271 -35.3 MLLW Outside 07V-47 Vibracore 11/18/2007 12.5 3485579 12249403 -51.0 MLLW Outside 07V-51 Vibracore 11/18/2007 13.5 3486446 12252894 -55.9 MLLW Within 07V-56 Vibracore 11/18/2007 7.6 3486696 12260077 -51.2 MLLW Outside 07V-59 Vibracore 11/18/2007 13.0 3480084 12256015 -56.2 MLLW Outside 07V-62 Vibracore 11/14/2007 10.5 3482827 12261274 -57.1 MLLW Within 07V-64 Vibracore 11/18/2007 9.0 3483246 12264944 -57.9 MLLW Outside 07V-65 Vibracore 11/14/2007 7.1 3481340 12263732 -58.2 MLLW Within 07V-69 Vibracore 11/14/2007 9.3 3479312 12266096 -58.6 MLLW Within 07V-71 Vibracore 11/17/2007 13.3 3476478 12264388 -54.4 MLLW Outside 07V-72 Vibracore 11/17/2007 4.5 3480749 12270403 -55.5 MLLW Outside 07V-77 Vibracore 11/14/2007 8.8 3479807 12271626 -59.3 MLLW Outside 07V-79 Vibracore 11/14/2007 6.2 3485318 12274197 -55.8 MLLW Outside 07V-82 Vibracore 11/17/2007 8.5 3471023 12271571 -51.9 MLLW Outside 07V-77 Vibracore 11/14/2007 8.8 3479807 12271626 -59.3 MLLW Outside 07V-79 Vibracore 11/14/2007 6.2 3485318 12274197 -55.8 MLLW Outside 07V-82 Vibracore 11/17/2007 8.5 3471023 12271571 -51.9 MLLW Outside 1 Exploration designation prefixes used in this report (e.g. charts) have been modified from designations used in the original reports.

2 Adjacent means that exploration is within 200 feet of the navigation channel.