OPR-D304-TJ-11Approaches to Chesapeake Bay, VAApproaches to Chesapeake Bay, VANOAA Ship Thomas Jefferson S-222F00602107/15/20115NM East of Cape Henry to CBBTVirginiaUnited States100002011CDR Lawrence T. Krepp, NOAAField Examination2011-07-152011-06-142011-06-15Multibeam Echo SoundermetersMean lower low watermetersMean lower low waterUniversal Transverse Mercator (UTM)UTCAtlantic Hydrographic BranchThe purpose of this survey is to provide contemporary surveys to update National Ocean Service (NOS) nautical charts. All separates are filed with the hydrographic data. Revisions and Red notes were generated during office processing. The processing branch concurs with all information and recommendations in the DR unless otherwise noted. Page numbering may be interrupted or non-sequential. All pertinent records for this survey, including the Descriptive Report, are archived at the National Geophysical Data Center (NGDC) and can be retrieved via http://www.ngdc.noaa.govThe Area surveyed comprises two separate locations. The western portion of the survey area in in the vicinity of the third and fourth islands of the Chesapeake Bay Bridge Tunnel (CBBT). The eastern portion of the survey area is in the vicinity of the inbound lane of the Northeast Approaches to Chesapeake Bay.37.049222694475.797944611136.938986388976.08304480561Survey Limitsfile:///T:/F00602_D304_TJ/AHB_F00602/Reports/DR/SupportFiles/F00602_PI_Limit.jpgThis FE responds to a recent request and grounding. The Pilots believe shoaling is occurring near the NE channel to Chesapeake Bay and would like some data collected to see if a full survey is warranted. The portion of the survey near the CBBT is in response to a recent grounding of the sailboat DONNYBROOKE The entire survey is adequate to supersede previous data.Refer to "CBBT verification of tunnels_090611.pdf" in Appendix V for details on the completeness of tunnel refurbishment that may impact this survey.This field examination was not assigned with formalized Project Instructions. The Survey Limits were provided in the form of a memo and MapInfo Tables of the survey areas.2Coveragefile:///T:/F00602_D304_TJ/AHB_F00602/Reports/DR/SupportFiles/F00602_Report_CovandLimit.jpgFormalized Project Instructions for this field examination were not provided to the field unit . Survey coverage was in accordance with the requirements of Mark Frieze email dated 9 June 2011, and CDR Rick brennen e-mail 10 June 2011 and included in Appendix V of this report.2011-06-142011-06-150002.86S222054.1104.6100000310206.1702.8500000060.2807.46000000No shoreline features assigned with OPR-D304-TJ-11 fell within the boundaries of F00602. Bottom samples were not required in this survey area. Refer to the Data Acquisition and Processing Report (DAPR) for a complete description of data acquisition and processing systems, survey vessels, quality control procedures and data processing methods. Additional information to supplement sounding and survey data, and any deviations from the DAPR are discussed in the following sections.3102310.775S2222084.78RESON7125 SV1MBESRESON7125 ROVMBESKlein5000 w/ Hull-mounted, light-weight towfishSSSKlein5000 w/ Towed, heavy-weight towfishSSSThis survey was a field examination and not a full Navigation Area survey. Limited time available and adherence to normal traffic patterns while surveying are reasons that crosslines were not acquired. Quality control from concurrent surveys provided reasonable assurance that systems were in good working order and data were accurate.0.0000.08531024 N/A 0.2 S2224 1 0.2 Crosslines were not acquired during this survey. Quality assurance via examination of the Standard Deviation layer of CUBE surfaces were not performed. Quality assurance for this FE is inferred from quality assurance performed during concurrent surveys on OPR-D304-TJ-11ThermoclineIn the Northeastern Approach to Chesapeake Bay, thermocline severly impacted the quality of side scan sonar imagery. Since the purpose of surveying in this area was to detect general shoaling in the vicinity of the inbound lane of the Northeast Approaches, side scan sonar operations were stopped and set line spacing MBES bathymetry was used to investigate the area for shoaling.3Thermoclinefile:///T:/F00602_D304_TJ/AHB_F00602/Reports/DR/SupportFiles/Thermocline.jpgNone ExistThere were no other factors that affected corrections to soundings.Casts were taken by MVP approximatly every 30 mins (ship), and CTDs were taken every 2 hours (launch). Two DQA comparisons were performed one for 3102 and S222 and were less than 2m/sec difference. Methods were as listed in the DAPRThe survey area was small enough that zoning for sound speed variation was not warranted.All Equipment and survey methods were used as detailed in the DAPR. The western area of the survey in the vicinity of the third and fourth islands of the CBBT were acquired by object detection multibeam and the Northeast Approaches inbound traffic lane was surveyed using set line spacing MBES.Corrections to echo soundings were as detailed in the DAPRAll sounding systems were calibrated as detailed in the DAPR.Backscatter was not collected for this survey.NOAAProfileField.xml.The CARIS applications HIPS/SIPS, BathyDataBase (BDB), and others use S-57 format to define features by attributes and attribute values. NOAA has customized these files to add non-IHO sanctioned attributes to allow additional information to be conveyed from the field unit to the processing branches and to Marine Charting Division. The field unit further customized these files to make certain attributes mandatory when creating features and feature reports. The NOAA_Profile_Field.xml file is included in the S-57 Features folder of this survey's data submission package.F00602_CombFinal_50cm.csarCUBE0.51.4322.58NOAA_0.5mObject DetectionF00602_East_CU_50cm_FinalCUBE0.59.2819.09NOAA_0.5mMB Set Line SpacingF00602_NW_CU_50cm_FinalCUBE0.51.4322.58NOAA_0.5mObject DetectionF00602_CBBT_1m_MosSSS Mosaic1.001N/A100% SSSF00602_SE_1m_mosSSS Mosaic1.001N/A100% SSSAdditional information discussing the vertical or horizontal control for this survey can be found in the DAPRMean lower low waterDiscrete ZoningChesapeake Bay Bridge Tunnel, VA 86388638638863.tidVerified ObservedD304TJ2011CORP_Rev.zdfFinalD00151CORF.zdfFinal2011-07-122011-09-15Tide note specifies that D304TJ2011CORP_Rev.zdf be used for zoning. Prior to receiving the zone file specified for this project, zoning from a 2009 Field Examination was used for preliminary analysis. Upon receipt of D304TJ2011CORP_Rev.zdf and notice that preliminary zoning was accepted as final, the values in the zoning file were compared. Aside from having different names, the files are identical in the area of this survey. Therefore it was deemed unnecessary to spend additional time and resources to process the data with the new file, as there would be no resultant change in processed depths from the survey. A detailed line query of the survey lines will indicate that D00151CORF.zdf is applied to the processed data. North American Datum of 1983 (NAD83)Diver, VA freq= 2891220552880000322009-122011-05-282011-05-28A detailed chart comparison was completed for NOS 12222. Comparisons to other available charts provided no additional changes worth noting. Refer to 12222 discussion for a detailed comparison to charted information.1220754880000222009-102011-05-212011-05-21A detailed chart comparison was completed for NOS 12222. Comparisons to other available charts provided no additional changes worth noting. Refer to 12222 discussion for a detailed comparison to charted information.1220854950000142009-082011-05-212011-05-21A detailed chart comparison was completed for NOS 12222. Comparisons to other available charts provided no additional changes worth noting. Refer to 12222 discussion for a detailed comparison to charted information.1222155880000812011-042011-05-212011-05-21A detailed chart comparison was completed for NOS 12222. Comparisons to other available charts provided no additional changes worth noting. Refer to 12222 discussion for a detailed comparison to charted information.1222255940000522009-092011-05-212011-05-21In the eastern portion of the survey area in the vicinity of the traffic separation zone and precautionary area, 28 charted depths were compared to surveyed soundings. The surveyed soundings were generally deeper except for an area on the north side. Slight encroachment is occurring where the surveyed 30 ft curve is extending toward a 32ft charted depth. The south island in Chesapeake channel has shoaling in the vicinity of the 16 foot sounding with 4 ft being the shoalest depth encountered. The area needs to be redefined with a foul area as mentioned in the DTON report since rip rap block has been placed in the area. The north tunnel is similarly addressed by the DTON report in Appendix I and the hob files located in the S-57 Features folder with the survey submission.4Tunnelsfile:///T:/F00602_D304_TJ/AHB_F00602/Reports/DR/SupportFiles/Tunnels.jpg5Encroachmentfile:///T:/F00602_D304_TJ/AHB_F00602/Reports/DR/SupportFiles/Encroachment.jpgUS5VA13M40000122008-06-102008-06-10falseA detailed chart comparison was completed for NOS 12222. Comparisons to other available charts provided no additional changes worth noting. Refer to 12222 discussion for a detailed comparison to charted information.US5VA11M5000092008-05-162008-08-04falseA detailed chart comparison was completed for NOS 12222. Comparisons to other available charts provided no additional changes worth noting. Refer to 12222 discussion for a detailed comparison to charted information.00No AWOIS items were assigned.No Charted features of the type PA, ED, PD or REP were found in the survey. See DToN report for specific additions to the chart.Refer to the Shoals and Hazardous Features section of this Descriptive ReportThere was no Orthometric Imagery Provided. Imagery from Google Earth were used to help document the changes to the area around the CBBT. 2011 Commonwealth, VA,; Digital Globe, GeoEye, USGS, USDA Farm Service, Map data 2012 Google EarthPGL1Danger to Navigation Reports are included in Appendix I of this report.The following are recommend charting: - Add a Foul Line as depicted in DTON report, refer to Appendix I. - Update the High Water shoreline. - Update to depict Rip Rap that extends from High Water shoreline across the entire channel. (dashed line) - Add an un-surveyed area (gray area extending from charted shoreline to the charted 16' sounding). - Add a Precautionary Note at all openings with verbiage similar to the following: "The CBBT is undergoing a scour remediation project where additional rock is being added to cover tunnel and bridge ways. Mariners should cross the tunnels between prescribed buoys and channel ways as the tabulated depths in these areas will be maintained. Due to the remediation project, areas outside the designated channel may not have reliable depths over Rip Rap areas marked by the dashed lines. - Although these two tunnel openings were the only ones surveyed, consideration should be given to address the areas around all CBBT openings in a similar manner. See DToN section D.1.5 Two channels are located in the vicinity of this survey: the inbound lane of the Northeast Approach to Chesapeake Bay and Cape Henry Channel. Survey work around the CBBT tunnel at the Cape Henry Channel does not address tabulated depths from US Army Corps of Engineers (USACOE). The Inbound lane of the Northeast Approach is not a federally maintained waterway, and therefore there are no tabulated depths available for comparison.A small area of shoreline surrounds the tunnel entrance and is appended by the foul area described in the DTON report. The shoreline is charted correctly. No S-57 Features in a Composite Source File were assigned for this survey area for investigation.Prior survey comparisons exist for this survey, but were not reviewed.Nine ATONs appear in this survey and appear to be on station and serving their intended purposes.No overhead features exist in this survey.No Submarine features are in this survey.No Ferry Routs exist in this survey.No platforms exist in this survey.No significant features were observed in this survey except those listed in the Feature Report in Appendix II.CBBT Scour Remediation Project is 66% complete, anticipating 350,000 tons of block in surrounding tunnel entrances. On September 6 2011, Bob Johnson Director of Maintenance was called. He conformed that the Chesapeake Channel and Thimble Shoal Channel tunnels are complete. The Chesapeake channel tunnel received full work, the thimble shoal channel was worked on the sides. There is still more work to be done on the trestles. The tunnels were exposed and about 8 feet of block put over them. the channel depths were maintained. The final surveys went to VRMC ( Virginia Marine resources committee) and USACOE and should be avaialble for cross checking depths. No new surveys or further investigations are recommended for this area.No new insets are recommended for this area.As Chief of Party, Field operations for this hydrographic survey were conducted under my direct supervision, with frequent personal checks of progress and adequacy. I have reviewed the attached survey data and reports.All field sheets, this Descriptive Report, and all accompanying records and data are approved. All records are forwarded for final review and processing to the Processing Branch.The survey data meets or exceeds requirements as set forth in the NOS Hydrographic Surveys and Specifications Deliverables Manual, Field Procedures Manual, Standing and Letter Instructions, and all HSD Technical Directives. These data are adequate to supersede charted data in their common areas. This survey is complete and no additional work is required with the exception of deficiencies noted in the Descriptive Report.LT Michael C. DavidsonField Operations Officer2012-05-25CDR Lawrence T. KreppCommanding Officer2012-05-25CHST Peter G. LewitSheet Manager2012-05-25file:///T:/F00602_D304_TJ/AHB_F00602/Reports/DR/Compiler/F00602_Feature_Report.pdffile:///H:/Surveys/F00602/Descriptive%20Report/Appendices/4_Tides_&_Water_%20Levels/F00602.pdffile:///H:/Surveys/F00602/Descriptive%20Report/Appendices/4_Tides_&_Water_%20Levels/Request_forTides/F00602_Tiderequest.pdffile:///H:/Surveys/F00602/Descriptive%20Report/Appendices/5_Supplemental_Survey_Records_Correspondence/CBBT%20verification%20of%20tunnels_090611.pdffile:///H:/Surveys/F00602/Descriptive%20Report/Appendices/5_Supplemental_Survey_Records_Correspondence/CBBT_scourproject_Important.pdffile:///H:/Surveys/F00602/Descriptive%20Report/Appendices/5_Supplemental_Survey_Records_Correspondence/D304_Begin_Work_NavMgr_notice.pdf