OPR-W386-TJ-22 Approaches to Cleveland, OH Lake Erie NOAA Ship Thomas Jefferson (S222) H13610 4 Vicinity of Presque Isle Pennsylvania United States 5000 2022 Matthew J. Jaskoski, CDR/NOAA Navigable Area 2022-04-19 2022-07-05 2022-08-12 Multibeam Echo Sounder Multibeam Echo Sounder Backscatter meters UTC 17 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 The survey area is referred to as H13610, "Vicinity of Presque Isle" (sheet 4) in the Project Instructions (PIs). The survey area is approximately 10 square nautical miles. 42.204623000000005 80.185109 42.104409000000004 80.011109 Data were acquired within the assigned survey limits as required in the Project Instructions and 2022 Hydrographic Survey Specifications and Deliverables (HSSD) unless otherwise noted in this report. See figure below for overview of sheet limits. H13610 assigned survey area (Chart US4PA21M) SupportFiles\H13610_sheet_limits.png Erie is Pennsylvania's primary port for accessing Lake Erie and the St. Lawrence Seaway. Erie, PA is occasionally used by container ships, tankers, barges, and other large shipping vessels. It also boasts a robust sailing and fishing community, scenic beauty, biodiversity, and historical connections.This area was identified as a statistically significant hotspot within the 2018 Hydrographic Health Model, a risk model that Coast Survey uses for evaluating priorities based upon navigational risk and the necessary quality of data to support modern traffic. The modern bathymetric survey in this area will not only identify hazards and changes to the lake bed, but will update National Ocean Service (NOS) nautical charting products and support Erie County's Lake Erie Quadrangle nomination for National Marine Sanctuary designation. https://www.sail-world.com/Australia/Erie-Pennsylvania-Small-place-big-boating/-127219 https://en.wikipedia.org/wiki/Economy_of_Erie,_Pennsylvania The entire survey is adequate to supersede previous data. Data acquired in H13610 meet multibeam echo sounder (MBES) coverage requirements for complete coverage, as required by the 2022 HSSD. This includes crosslines (see section B.2.1), NOAA allowable uncertainty (see Section B.2.10), 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 was acquired in accordance with the 2022 HSSD. Complete coverage requirements were met with 100% multibeam (MBES) or full MBES coverage. See image below for more detail on the extents of survey coverage. Coverage met the inshore limit of hydrography, the Navigable Area Limit Line (NALL). The NALL is defined as the most seaward of the following: the surveyed 3.5- meter depth contour, the line defined by the distance seaward from the observed mean high water (MHW) line which is equivalent to 0.8 millimeters at chart scale, or the inshore limit of safe navigation. Areas where H13610 survey coverage reached neither 3.5 meters water depth, nor the assigned sheet limits, was due to the presence of hazards such as a thick weeds, recreational boaters, swimmers or private docks and moorings. See image below for an example of NALL determination for this survey. Pydro Explorer QC Tool Holiday Finder was used to detect gaps in data (holidays) on the finalized Single Resolution (SR) surfaces for submission. Holiday finder yielded 3 certain holidays. Two of these holidays are false positives; one is marking the outer edge of survey coverage and the other is marking a gap left around an above water feature. The final holiday was created after cleaning out vegetation from the MBES data. See image below for an overview of these holidays. H13610 MBES coverage and assigned survey limits. SupportFiles\H13610_survey_coverage.png Examples of H13610 NALL determination; the black dashed line indicates assigned sheet limits and the yellow indicates where the 3.5-meter contour was reached. SupportFiles\H13610_NALL.png Overview of H13610 Holidays. SupportFiles\H13610_holidays.png 2903 0.0 371.1 0.0 0.0 0.0 0.0 0.0 37.1 0.0 2904 0.0 449.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 820.7 0.0 0.0 0.0 0.0 0.0 37.1 0.0 3.5 8 0 0 0 10.1 2022-07-05 2022-07-16 2022-07-17 2022-07-19 2022-07-20 2022-07-26 2022-07-27 2022-07-28 2022-07-29 2022-07-30 2022-07-31 2022-08-01 2022-08-02 2022-08-03 2022-08-12 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 operating offshore Presque Isle, PA. SupportFiles\Chloe_2903.jpg Positioning and Attitude System Applanix POS MV 320 v5 MBES Kongsberg Maritime EM 2040 Conductivity, Temperature, and Depth Sensor Sea-Bird Scientific SBE 19plus V2 Sound Speed System Teledyne RESON SVP 70 Thomas Jefferson launch 2903 acquired 37.1 nautical miles of multibeam crosslines or 3.5 % of mainscheme lines across most depth ranges and multiple boat days. H13610 crossline data is adequate for verifying and evaluating the internal consistency of survey data. The Compare Grids function in Pydro Explorer analyzed finalized single resolution (SR) surfaces of H13610 crossline-only data and mainscheme-only data. In the difference surface, the resulting mean was 0.02 m with a standard deviation of 0.04 m; 99.5% of nodes met IHO allowable Total Vertical Uncertainty (TVU) standards. See figures below for specific details on crossline analysis. H13610 crossline surface overlaid on mainscheme tracklines. SupportFiles\H13610_crossline_fraqAllowErr.png Pydro derived plot showing absolute difference. SupportFiles\H13610_XL_1m_LWD_Final-H13610_MS_1m_LWD_Final_depth_delta.png Pydro derived plot showing percentage-pass value of H13610 mainscheme to crossline data. SupportFiles\H13610_XL_1m_LWD_Final-H13610_MS_1m_LWD_Final_fracAllowErr_Freq.png ERS via VDATUM 0.0 0.045 2903/2904 4 N/A N/A 0.2 Total Propagated Uncertainty (TPU) values for survey H13610 were derived from a combination of fixed values for equipment and vessel characteristics, as well as from field assigned values for sound speed uncertainties. Tidal uncertainty was provided in the project instructions for the NOAA vertical datum transformation model used for this survey. In addition to the usual a priori estimates of uncertainty, some real-time and post-processed uncertainty sources were also incorporated into the depth estimates of this survey. Real-time uncertainties for position, navigation, attitude, and vessel motion data from Applanix POS MV were applied during acquisition and initially in post-processing. However, the SBET and RMS files, which were generated using POSPac MMS software and applied in CARIS HIPS to supersede POS MV data, have post-processed uncertainties associated with the GPS height and position. Uncertainty values of the submitted finalized grids were calculated in Caris using "Uncertainty" of uncertainty and standard deviation (scaled to 95%). Grid QA v5 within Pydro QC Tools was used to analyze H13510 TVU compliance. H13610 met the 2022 HSSD requirements in over 99.5 percent of grid nodes, which is shown in the histogram plot below. Pydro QC Tools 2 Grid QA was used to analyze H13610 multibeam echosounder (MBES) data density. The submitted H13610 single-resolution surface met the 2022 HSSD density requirements as shown in the histograms below. Pydro derived plot showing TVU compliance of H13610 finalized single-resolution MBES data. SupportFiles\H13610_MB_1m_LWD_Final.QAv6.tvu_qc.png Pydro derived histogram plot showing HSSD density compliance of H13610 finalized single-resolution MBES data. SupportFiles\H13610_MB_1m_LWD_Final.QAv6.density.png Survey H13610 junctions with one contemporary survey conducted by NOAA Ship Thomas Jefferson. Comparisons were made using the Compare Grids program within Pydro Explorer. H13611 5000 2022 Thomas Jefferson NW The junction with survey H13611 encompassed approximately 0.34 square nautical miles along the western boundary of H13610. Pydro's Compare Grids results showed that 99.5+% of nodes in the common area met NOAA allowable error standards. Analysis of the difference surface indicated that H13611 is an average of 0.00 meters different than H13610 with a standard deviation of 0.04 meters. See figures below for more information. Overview of survey junction between H13610 and H13611. SupportFiles\H13610-H13611_Junction_Overview.png Pydro derived plot showing H13610 and H13611 comparison statistics. SupportFiles\H13610_MB_1m_LWD-H13611_MB_1m_LWD_depth_delta.png H13610 fractional allowable error node distribution. SupportFiles\H13610_MB_1m_LWD-H13611_MB_1m_LWD_fracAllowErr_Freq.png 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. Dense vegetation While conducting survey operations, field personnel reported dense patches of vegetation in Erie Harbor north of Entrance Channel A. This vegetation was prominent in the multibeam data and resulting grid surfaces. After consultation with Atlantic Hydro Branch personnel (submitted in II_Supplemental_Records with this report), these vegetation patches were cleaned out of the submitted surfaces. This cleaning resulted in one holiday detailed in section A.4. Survey Coverage. Additionally, a delineated WEDKELP area object was added to the Final Feature File (FFF). Dense patches of vegetation in Erie Harbor prior to cleaning. SupportFiles\H13610_vegitation.png 58 sound speed profiles were acquired for this survey at discrete locations within the survey area at least once every four hours, when significant changes in surface sound speed were observed, or when operating in a new area. Launch sound speed profiles were acquired using Sea-Bird 19plus SEACAT Profilers. All casts were concatenated into a master file and applied to MBES data using the "Nearest distance within time" (4 hours) profile selection method. H13610 sound speed cast locations. SupportFiles\H13610_cast_locations.png All equipment and survey methods were used as detailed in the DAPR. 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 the QPS Fledermaus GeoCoder Toolbox (FMGT) software, and the exported geotiffs are included in the final processed data submission package. Overview of H13610 backscatter mosaics. SupportFiles\H13610_backscatter_overview.png NOAA Profile Version 2022 H13610_MB_1m_LWD CARIS Raster Surface (CUBE) 1 1.0 15.2 NOAA_1m Complete MBES H13610_MB_1m_LWD_Final CARIS Raster Surface (CUBE) 1 1.0 15.2 NOAA_1m Complete MBES H13610_MBAB_2m_2903_400kHz_1of2 MB Backscatter Mosaic 2 N/A MBAB Backscatter H13610_MBAB_2m_2904_300kHz_2of2 MB Backscatter Mosaic 2 N/A MBAB Backscatter Submitted surfaces were generated using the recommended parameters for depth-based (Ranges) Caris single-resolution bathymetric grids as specified in the 2022 HSSD. Pydro QC Tools Detect Fliers was used with the experimental option 7 "Noisy Margins" selected to find fliers in a finalized 1 meter single resolution surfaces. Obvious noise was rejected by the Hydrographer in Caris Subset Editor. After data cleaning, Detect Fliers was run again and found 38 potential fliers. Upon further inspection, these flagged grid's nodes are considered to be accurate representations of the sea floor and have been retained in the submitted surfaces. Field installed tide and GPS stations were not utilized for this survey. There is no HVCR report included with the submission of H13610. Low Water Datum 569.2 ft IGLD-1985 Lake Erie ERS via VDATUM OPR-W386-TJ-22_NAD83_2011_VDatum_LWD_IGLD85 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. The Wide Area Augmentation System (WAAS) was used for real-time horizontal control during data acquisition. US4PA21M 15000 19 2021-10-15 2021-10-15 US4PA22M 80000 14 2021-10-15 2021-10-15 The ENC's charted depth curves showed general agreement with H13610 derived survey contours with one notable exception. The area around Gull point of Presque Isle, PA showed shoaling significantly differently than what is currently charted. H13610 data showed the 3.6 m and 5.4 m survey contours extending approximately 175 m from Gull Point. Additionally the 7.3 m contour lays approximately 200-400 m farther offshore than the current ENC depth curve. A more detailed comparison of derived survey depths and charted depths within these channels is made in the images below. Shoal east of Gull Point, Presque isle, PA overlaid with contours derived from H13610. SupportFiles\H13610_shoal.jpg Limited shoreline verification was conducted in accordance with applicable sections of NOAA 2022 HSSD and FPM using the Project Reference File (PRF) and Composite Source File (CSF) provided with the Project Instructions. In the field, all assigned features that were safe to approach were addressed as required with S-57 attribution and recorded in the H13610 FFF to best represent the features at survey scale. This file also includes new features found in the field as well as recommendations to update, retain or delete assigned features. No uncharted features exist for this survey. There is one designated Channel within survey H13610 leading to Presque Isle Bay. Throughout the channel derived survey depths and charted soundings showed general agreement. A more detailed comparison of derived survey depths and charted depths within these channels is made in the images below. Comparison of derived survey soundings and charted depths in southwest portion of entrance Channel A. SupportFiles\H13610_channel_1.png Comparison of derived survey soundings and charted depths in northeast portion of entrance Channel A. SupportFiles\H13610_channel_2.png Twenty-four charted AtoNs were assigned, investigated and confirmed to be on station. Two fog signals were not addressed during survey operations. No AtoN reports were filed with the U.S Coast Guard. No Maritime Boundary Points were assigned for this survey. Nine bottom samples were assigned within the H13610 sheet limits, however during acquisition one sample did not yield a return. The results of the remaining nine bottom samples acquired are included in the H13610 Final Feature File submitted with this report. See image below for an example of a typical bottom sample for this survey. Example of typical H13610 bottom sample. SupportFiles\H13610_bottom_sample.JPG No overhead features exist for this survey. Eight pipelines were assigned within H13610. Reference the Final Feature File included with the submission of this project for further information. No platforms exist for this survey. No ferry routes or terminals exist for this survey. No abnormal seafloor or environmental conditions exist for this survey. 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 Commanding Officer 2022-11-15 Michelle M. Levano LT/NOAA Field Operations Officer 2022-11-15 Erin K. Cziraki Chief Survey Technician 2022-11-15 Audrey E. Jerauld Senior Survey Technician 2022-11-15