OPR-W386-TJ-22 Approaches to Cleveland, OH Lake Erie NOAA Ship Thomas Jefferson (S222) H13612 6 Vicinity of South Bass Island Ohio United States 5000 2022 Matthew J. Jaskoski, CDR/NOAA Navigable Area 2022-04-19 2022-06-07 2022-06-14 Multibeam Echo Sounder Multibeam Echo Sounder Backscatter, Side Scan Sonar meters UTC Atlantic Hydrographic Branch Any revisions to the Descriptive Report (DR) applied during office processing are shown in red italic text. The DR is maintained as a field unit product, therefore all information and recommendations within this report are considered preliminary unless otherwise noted. The final disposition of survey data is represented in the NOAA nautical chart products. All pertinent records for this survey are archived at the National Centers for Environmental Information (NCEI) and can be retrieved via https://www.ncei.noaa.gov/. Products created during office processing were generated in NAD83 UTM 17N, LWD-IGLD 1985. All references to other horizontal or vertical datums in this report are applicable to the processed hydrographic data provided by the field unit. CC0-1.0 (NOAA Field Units) CC0-1.0 https://creativecommons.org/publicdomain/zero/1.0/ https://creativecommons.org/publicdomain/zero/1.0/legalcode These data were produced by NOAA and are in the public domain within the United States. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0). NOAA Survey H13612, located in Lake Erie, OH in the vicinity of South Bass Island, was conducted in accordance with coverage requirements set forth in the Project Instructions (PI) OPR-W386-TJ-22. 41.70389555555556 82.88851416666667 41.61358694444444 82.75360444444445 Survey data were acquired in accordance with the requirements set forth by the Project Instructions (PI) and the 2022 Hydrographic Surveys Specifications and Deliverables (HSSD) (Figure 1). The survey layout for H13612 plotted over RNC 14844. Black outline represents the survey limits set forth by the Project Instructions, MBES coverage is in color, and SSS coverage is in greyscale. SupportFiles\A.1_survey_overview.png The Port of Cleveland is one of the largest ports in the Great Lakes and ranks within the top 50 ports in the United States. Roughly 13 million tons of cargo are transported through Cleveland Harbor each year supporting over 20,000 jobs and $3.5 billion in annual economic activity [1]. South Bass, Middle Bass, and Kelleys Island's primary industry is tourism supporting approximately 750,000 visitors annually with ferry services available between the islands and mainland Ohio [2]. This project will provide modern bathymetric data for the Cleveland area as well as the vicinity of South Bass Island and Presque Isle. The project area was identified as a statistically significant hot spot within the 2018 Hydrographic Health Model, a risk model that Coast Survey uses for evaluating priorities based upon navigational risks and the necessary quality of data to support modern traffic. Most of this area has not been surveyed since the 1940s, and experiences significant professional and recreational vessel traffic largely supporting a significant tourist industry. A modern bathymetric survey in this area will identify hazards and changes to the seafloor, provide critical data for updating National Ocean Service (NOS) nautical charting products and improve maritime safety. Survey data from this project is intended to supersede all prior survey data in the common area. 1. https://www.portofcleveland.com/ 2. https://www.greatlakesnow.org/ The entire survey is adequate to supersede previous data. Complete coverage requirements were met utilizing a combination of 100% multibeam echo sounder (MBES) coverage and 100% side scan sonar (SSS) with concurrent MBES coverage as specified by the 2022 HSSD. Data acquired in H13612 meet survey quality standards specified in the 2022 HSSD, including crosslines (see Section B.2.1), NOAA allowable uncertainty (see Section B.2.2), and density requirements (see Section B.5.2). All waters in survey area Complete Coverage (Refer to HSSD Section 5.2.2.3) All waters in survey area Acquire backscatter data during all multibeam data acquisition (Refer to the HSSD Section 6.2) Survey coverage is in accordance with requirements listed in Table 2 and in the 2022 HSSD. These requirements were met with a combination of 100% complete coverage MBES and 100% SSS with concurrent MBES coverage. Assigned features requiring a disproval radius were addressed with 200% SSS with concurrent MBES (see Section B.2.8 for more information). Additional MBES coverage was acquired outside of the assigned limits, between North Bass and Middle Bass Islands, as reconnaissance over an area in which the ship would transit (Figure 2). These additional data are included in the submitted surfaces and in the final delivery package. Due to operational time constraints and the purpose of acquisition, the area was not acquired to the inshore limit of hydrography, and holidays were not collected. Several holidays exist in the reconnaissance area, but after inspection of surrounding areas, do not appear to be navigationally significant. Coverage within the sheet limits was acquired to the inshore limit of hydrography, the Navigable Area Limit Line (NALL). Areas where survey coverage did not reach the 3.5-meter depth contour, nor the assigned sheet limits, were due to the survey vessel reaching the extent of safe navigation (Figure 3). These areas are characterized as being near shore, in a mooring buoy area, or subject to dangerous wave action or other hazards. Three holidays exist outside the sheet limits in the combined coverage achieved for H13612 (Figure 4). Two of the holidays exist in Put-in-Bay and are from data intentionally rejected due to pier support structures. One additional holiday exists on the outer edge of the survey coverage and was not collected due to operational time constraints. After inspection of surrounding area, this holiday does not appear to be navigationally significant. Additionally, visible gaps in the bathymetric surface exist but are not large enough to meet the definition of a holiday for complete coverage requirements. Following completion of mainscheme acquisition, surveyed soundings were assessed against charted soundings on ENC US4OH08M to determine whether bathymetric splits were necessary. Splits were acquired where charted soundings were found to be shallower than neighboring surveyed soundings by more than the maximum allowable TVU at that depth (generally 0.5m or greater). Upon completion of acquisition, surveyed soundings were assessed against charted soundings on the larger scale ENCs US5OH08M and US6OH1AM; it was determined 12 additional bathymetric splits were required by this method but were not acquired due to operational time constraints (Figure 5). After inspection of SSS imagery and surrounding lakebed bathymetry, the hydrographer does not believe 11 of the 12 unacquired charted soundings are critical for safe navigation. Though SSS does not indicate a feature, one charted sounding at 41° 37' 10.9" N/ 082° 49' 18.2" W is recommended to be retained based on the rocky nature of the lakebed in this area (Figure 5). Overview shows the area outside of assigned sheet limits surveyed as reconnaissance prior to ship transit outlined in blue. Inset shows holidays and where the coverage did not meet the inshore limit of hydrography. SupportFiles\Fig2AdditionalCoverage.png Areas where coverage did not meet the 3.5m depth contour or the assigned sheet limits outlined in blue SupportFiles\Fig3_NALLissues.png Holidays in multibeam coverage outside the sheet limits SupportFiles\A4_holidays.png Overview shows red charted soundings requiring a bathymetric split. Inset shows the charted sounding at location 41° 37' 10.9" N/082° 49' 18.2" W that is recommended to be retained based on the rocky lakebed. SupportFiles\bathymetricsplits.png 2903 0.0 79.2 0.0 0.0 0.0 133.0 0.0 15.1 0.0 2904 0.0 148.3 0.0 0.0 0.0 0.0 0.0 0.3 0.0 0.0 227.5 0.0 0.0 0.0 133.0 0.0 15.4 0.0 4.3 6 0 0 0 8.6 2022-06-07 2022-06-08 2022-06-09 2022-06-10 2022-06-11 2022-06-13 2022-06-14 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. 2903 8.5 1.2 2904 8.5 1.2 Thomas Jefferson Launch 2903 SupportFiles\B.1 2903.png Thomas Jefferson Launch 2904 SupportFiles\B.1 2904.jpeg MBES Kongsberg Maritime EM 2040 MBES Backscatter Kongsberg Maritime EM 2040 SSS EdgeTech 4200 Positioning and Attitude System Applanix POS MV 320 v5 Conductivity, Temperature, and Depth Sensor Sea-Bird Scientific SBE 19plus V2 Sound Speed System Teledyne RESON SVP 70 Vessel configurations, equipment operations, data acquisition, and processing were consistent with specifications described in the DAPR. Hydrographic Survey Launches 2903 and 2904 collected 15.36 linear nautical miles of MBES crosslines or 4.26% of mainscheme MBES data. The crosslines acquired represent good spatial and depth diversity for this survey area (Figure 8). A 0.5 m single resolution (SR) Combined Uncertainty and Bathymetry Estimator (CUBE) surface of mainscheme data and a 0.5 m SR CUBE surface of crossline data were differenced - the resulting mean was 0.01m with a standard deviation of 0.04m (Figure 9). Over 99.5% of nodes are compliant with fraction of allowable error standards (Figure 10). Visual inspection of the difference surface indicated no systematic issues. A 0.5 m SR surface was used because the hydrographer determined it to be a more accurate representation of the observed bathymetry; see Section B.5.2 for more information and reference the DR Appendices for a record of communication regarding approval of a 0.5 m grid. Overview of H13612 crossline distribution by geography and depth, shown in color, overlaid on mainscheme data shown in greyscale SupportFiles\B.2 Crossline layout.png H13612 crossline/mainscheme comparison statistics SupportFiles\B.2 Crossline Stats.png H13612 crossline fraction of allowable error statistics SupportFiles\B.2 Crossline Fraq allowable error.png ERS via VDATUM 0.0 0.045 2903 4 N/A N/A 0.2 2904 4 N/A N/A 0.2 The bathymetric surface's uncertainty layer is compliant with 2022 HSSD uncertainty standards. Over 99.5% of all nodes pass uncertainty standards (Figure 11). H13612 uncertainty standards SupportFiles\B.2.2 Uncertainty Stats.png Survey H13612 junctions with H13613 within the OPR-W386-TJ-22 project. H13613 5000 2022 THOMAS JEFFERSON E Refer to survey H13613 Descriptive Report for junction analysis. Sonar system quality control checks were conducted as detailed in the quality control section of the DAPR. None Exist There were no conditions or deficiencies that affected equipment operational effectiveness. None Exist There were no other factors that affected corrections to soundings. Static conductivity, temperature, and depth (CTD) casts were conducted at the start of acquisition each day and at a minimum of one every four hours during launch acquisition using a Sea-Bird Seacat 19+ V2 CTD. Static cast frequency was increased in areas where a change in surface sound speed greater than two meters per second existed. All sound speed methods were used as detailed in the DAPR. A total of 36 sound speed profiles were collected as part of acquisition of H13612 and display good spatial diversity (Figure 12). Four of these casts were located outside of the sheet limits, not more than 150m away, and display profiles representative of the area. An additional cast was taken 3,220 meters outside the sheet limits, but was within the limits of the reconnaissance data for Sugar Reef. All sound speed profile data were concatenated into a master file for the sheet. MBES data were corrected by applying profiles nearest in distance in time (4 hours) using this master file. Overview shows all CTD casts collected on H13612. Cast locations are shown as blue targets overlaid on greyscale MBES data. SupportFiles\B.2 SVP distribution.png Complete coverage requirements were met by 100% SSS coverage with concurrent MBES and 100% complete coverage MBES as specified under section 5.2.2.2 of the 2022 HSSD (Figure 12). Launch 2903 was outfitted with a Kongsberg EM2040 MBES system, an Edgetech 4200 SSS system, and was primarily used to acquire 100% SSS coverage with concurrent MBES, 200% SSS coverage to address assigned features, and crosslines. Launch 2904 was outfitted with a Kongsberg EM2040 MBES system and was primarily used to acquire 100% complete coverage MBES, developments, bathymetric splits, and holidays. Additional MBES coverage was acquired outside of the assigned limits as reconnaissance over an area in which the ship would transit (Figure 13). These additional data meet complete coverage specifications and are included in the submitted surfaces and in the final delivery package. Reference Section A.4 for information regarding holidays in the reconnaissance area. Reference the DR Appendices for a record of communications regarding the inclusion of additional data. Coverage types used to meet complete coverage specifications. Areas of complete coverage MBES are outlined in blue and areas of complete coverage SSS with concurrent MBES are outlined in black. Reconnaissance area for ship's transit outlined in red. SupportFiles\B.2.3coverage_types.png All data reduction procedures conform to those detailed in the DAPR. All sounding systems were calibrated as detailed in the DAPR. All equipment and survey methods were used as detailed in the DAPR. Raw MBES backscatter was flagged as part of the .all file from the Kongsberg EM2040 systems. Backscatter was processed in QPS Fledermaus GeoCoder Toolbox (FMGT) software, and the exported geotiffs are included in the final processed data submission package (Figures 14 and 15). 300kHz backscatter mosaic from data acquired by 2903. SupportFiles\B.4 2903_backscatter.png 300kHz backscatter mosaic from data acquired by 2904. SupportFiles\B.4 2904_backscatter.png NOAA Profile Version 2022 Feature Object Catalog NOAA Profile Version 2022 was used for all S-57 attribution in the Final Feature File (FFF). All other software were used as detailed in the DAPR. H13612_MB_50cm_LWD CARIS Raster Surface (CUBE) 0.5 1.1 19.3 NOAA_0.5m Complete MBES H13612_MB_50cm_LWD_Final CARIS Raster Surface (CUBE) 0.5 1.1 19.3 NOAA_0.5m Complete MBES H13612_MBAB_2m_300kHz_1of2 MB Backscatter Mosaic 2 N/A Complete MBES H13612_MBAB_2m_300kHz_2of2 MB Backscatter Mosaic 2 N/A Complete MBES H13612_SSSAB_1m_600kHz_1of2 SSS Mosaic 1 N/A 100% SSS H13612_SSSAB_1m_600kHz_2of2 SSS Mosaic 1 N/A 200% SSS Complete coverage requirements were met by 100% SSS coverage with concurrent MBES and 100% complete coverage MBES as specified under section 5.2.2.2 of the 2022 HSSD. During the initial phases of surface review and QC, the hydrographer observed that a 1m surface resolution did not adequately represent significant rocks and other features observed in the sounding data. A surface with a 0.5 m resolution was created and found to be a more accurate representation of observed bathymetry. The 0.5 m grid was assessed for compliance with specifications outlined in the 2022 HSSD and was found to meet uncertainty (Section B.2.2) and density standards (Figure 16). Reference the DR Appendices for a record of communications regarding the decision and approval of a 0.5 m grid. While there are visible gaps in the bathymetric surface in areas of 100% complete MBES coverage, they are not large enough to meet the definition of a holiday for complete coverage requirements. There are three holidays present in the combined coverage achieved on H13612 as discussed in Section A.4. After multiple rounds of surface cleaning, a total of 85 fliers remain as detected by NOAA's QC Tool Flier Finder available in the Pydro XL-19 suite. The hydrographer reviewed the flagged grid nodes, considers them to be accurate representations of the lake bed, and has retained them in the final delivered surfaces. Two unverified Charted Features (UCFs) outside of the NALL were addressed with 200% SSS with concurrent MBES coverage. See section D.1.3 for details. The 200% SSS mosaic is included in the final deliverables package (Figure 17). H13612 data density standards SupportFiles\B.5.2 Density Stats.png H13612 200% SSS mosaic for feature disproval areas SupportFiles\B.5_200SSSMosaic.png Field installed tide and GPS stations were not utilized for this survey. There is no HVCR report included with the submission of H13612. Low Water Datum IGLD-1985 ERS via VDATUM OPR-W386-TJ-22_NAD83_2011_VDatum_LWD_IGLD85 All soundings submitted for H13612 are reduced to LWD IGLD-85 using VDatum techniques as outlined in the DAPR. North American Datum 1983 Projected UTM 17 Trimble-RTX service was used with an Applanix POS MVv5 GNSS_INS system to obtain highly accurate ellipsoidally referenced position data to meet ERS specifications for H13612 MBES data from HSLs 2903 and 2904. The Wide Area Augmentation System (WAAS) was used for real-time horizontal control during data acquisition on HSLs 2903 and 2904. US6OH1AM 5000 1 2017-08-30 2018-05-15 US5OH08M 40000 5 2022-05-05 2022-05-17 No shoals or potentially hazardous features exist for this survey. A total of 137 charted features were assigned for investigation, and 103 were not addressed due to being inshore of the NALL. Two fishing stakes were designated as Unverified Charted Features (UCFs) and are recommended to be retained. Reference the FFF for more information. Three uncharted features were investigated as part of acquisition on H13612 and are recommended for charting. Reference the FFF for more information. Two channels were investigated as part of acquisition on H13612 and visually confirmed to exist. Surveyed soundings were determined to be deeper than controlling depths for both Put-In-Bay Approach Channel and Put-In-Bay Dock Channel. Twelve charted aids to navigation (ATONs) were investigated and confirmed to be on station. No ATON reports were filed with the U.S. Coast Guard. No Maritime Boundary Points were assigned for this survey. Six bottom sample locations were assigned for investigation and completed. See FFF for more information. No overhead features exist for this survey. Six submarine cables were assigned for investigation within H13612. None were observed in MBES and SSS data. Additionally, four pipeline features were assigned for investigation but were not addressed due to being inshore of the NALL. No platforms exist for this survey. Five ferry routes were assigned for investigation within H13612 and are serving their intended purpose per visual confirmation and AIS traffic data. One depression centered around 41° 37' 03.6" N/082° 48' 59.3" W was investigated with complete coverage MBES based on information from a local ferry (Figure 18). The ferry captain reported existence of a 60 foot sounding approximately 0.5 nautical miles southeast of Starve Island. Upon review of SSS with concurrent MBES, the hydrographer saw evidence of soundings significantly deeper than charted soundings in this area, so complete coverage MBES was acquired. A max depth of 19.3 m was surveyed in the vicinity of a 9.1 m charted depth (Figure 18). Surveyed deep area centered around 41° 37' 03.6" N/082° 48' 59.3" W overlaid on ENC US5OH08M. SupportFiles\Deeparea.png No present or planned construction or dredging exist within the survey limits. No new surveys or further investigations are recommended for this area. No new ENC scales 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 Specifications and Deliverables, Field Procedures Manual, 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. Matthew J. Jaskoski, CDR/NOAA Chief of Party 2022-09-20 Michelle M. Levano, LT/NOAA Field Operations Officer 2022-09-20 Erin K. Cziraki Chief Survey Technician 2022-09-20 Sydney M. Catoire, LT/NOAA Sheet Manager 2022-09-20