Dietsch, Benjamin J. and Densmore, Brenda K. 2014 Version 1.0 vector digital data Reston, Virginia U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?pp1798J_NorthOmahaCoal_PowerPlant_20111014_csar Densmore, B.K., Burton, B.L., Dietsch, B.J., Cannia, J.C, and Huizinga, R.J. 2014 1 document U.S. Geological Survey Professional Paper 1798-J Reston, Virginia U.S. Geological Survey http://pubs.er.usgs.gov/publication/pp1798J A RESON SeaBat™ 7125 multibeam echosounder in conjunction with an Applanix Position Orientation Solution for Marine Vessels (POS MV™) WaveMaster system motion sensor, HYPACK®/HYSWEEP® navigation software, and Ashtech Z-Xtreme GPS receivers or Trimble R8 receivers was used to survey the Missouri River bed at 15 pipeline crossings at four different locations, at three power plant locations, and at one transmission tower during the 2011 flood event. The format of this data is a grid with each cell covering 0.5 meter by 0.5 meter. The elevation value (North American Vertical Datum, NAVD88) represented by each cell is the most probable elevation for that cell based on calculated Total Propagated Uncertainty (TPU) as calculated in Caris HIPS and SIPS software. Calculated TPS values are then used by Caris to create a Combined Uncertainty and Bathymetric Estimator (CUBE) surface. The surface grid was used to export the cell centroid position (Northing, Easting in UTM zone 14 North, in meters) along with the cell elevation (referenced to NAVD88, in meters) to create the text file. The data were collected by the U.S. Geological Survey in cooperation with the Environmental Protection Agency (EPA) and the Omaha Public Power District (OPPD). The data collection effort was conducted in order to provide detailed hydrographic data for EPA and OPPD to use in evaluation of the effects of the 2011 Missouri River flood on the safety of pipelines, power plant operations, and a transmission tower. 20111014 ground condition Complete None planned 95.93985 95.95163 41.33594 41.32876 USGS Thesaurus ISO 19115 inlandWaters USGS Thesaurus inlandWaters topography multibeam sonar bathymetry terrain USGS Metadata Identifier USGS:8d7973f4-999f-4e83-a12e-9839a7b082b5 Geographic Names Information System Nebraska Iowa Douglas County Pottawattamie County Missouri River None The U.S. Geological Survey makes no guarantee nor offers any warranty concerning the accuracy, condition, or application of the information contained in this geographic data release. Although these data have been used successfully on computers of the USGS, no warranty, expressed or implied, is made by WRD regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits, arising out of the delivery, installation, operation, or use of these data. This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Brenda K. Densmore U.S. Geological Survey Hydrologist mailing and physical

5231 S 19th St

Lincoln Nebraska 68512 402-328-4100 bdensmore@usgs.gov https://water.usgs.gov/GIS/browse/pp1798J_NorthOmahaCoal_PowerPlant_20111014.jpg Illustration of data set jpg Prepared in Cooperation with the U.S. Environmental Protection Agency and the Omaha Public Power District None Unclassified None HYPACK®/HYSWEEP® 2011 Caris HIPS and SIPS and Base Editor Applanix Corporation 2011 document Online Applanix Corporation http://www.applanix.com/media/downloads/products/specs/posmv_specifications.pdf Reson Inc. 2011 document Online Reson http://www.reson.com/wp-content/uploads/2010/07/SeaBat-7125-product-leaflet-V12_small.pdf Reviewers examined attributes and elevation values. Some areas of the channel were not completely covered due to shallow depths and time constraints. Horizontal accuracy is dependent on the accuracy of the GPS surveyed position, the accuracy of the sonar angle measurement, the accuracy of the boat motion data, and the accuracy of the sonar distance measurement. The GPS survey is based off USGS established benchmarks utilizing the NGS Online Positioning Users Service. The benchmarks processed through OPUS with peak to peak error estimates in latitude ranging from 0.004 to 0.036 m and ranging in longitude from 0.003 to 0.073 m. GPS accuracy is not only determined by the base station accuracy, but also by the accuracy of the rover unit. The rover unit used during multibeam surveying is an Applanix POS MV™ WaveMaster which utilized the base station correction information along with data from two GPS antennas mounted on the survey boat and an Inertial Measurement Unit (IMU). The positional accuracy of the rover unit can range from 0.02-0.10 m, depending on the quality of the differential corrections, based on specifications given for the POS MV™ Wavemaster. The accuracy of the data included in this release should be at the lower end of this range since only fixed positions are used. In addition, the specifications for the POS MV™ WaveMaster show that the unit can estimate roll and pitch of the boat with an accuracy of 0.02 degrees utilizing real-time kinematic corrections for position. Resolution of depth estimation (or sonar travel distance) as described by Reson for the SeaBat™ 7125 multibeam echosounder is 0.005 m. 0.08 Estimate based on equipment specifications and surveying results. Vertical accuracy is dependent on the accuracy of the GPS surveyed elevation, the accuracy of the boat motion, and the accuracy of the depth estimation. The GPS survey is based off USGS established benchmarks utilizing the NGS Online Positioning Users Service. The benchmarks processed through OPUS with peak to peak error estimates in the ellipsoid ranging from 0.013 to 0.056 m and in the orthometric ranging from 0.020 to 0.095 m. GPS elevation accuracy is not only determined by the base station accuracy, but also by the accuracy of the rover unit. The rover unit used during multibeam surveying is an Applanix POS MV™ WaveMaster which utilized the base station correction information along with data from two GPS antennas mounted on the survey boat and an inertial measurement unit (IMU). Only data coded as a "fixed" position by the POS-MV is used to determine water surface elevations. The position accuracy of the rover unit can range from 0.02-0.10 m, depending on the quality of the differential corrections, based on specifications given for the POS MV™ Wavemaster. The accuracy of the data included in this release should be at the lower end of this range since only fixed positions were used. In addition, the specifications for the POS MV™ WaveMaster show that the unit can estimate roll and pitch of the boat with an accuracy of 0.02 degrees utilizing RTK. Resolution of depth estimation as described by Reson for the SeaBat™ 7125 multibeam echosounder is 0.005 m. 0.10 Estimate based on equipment specifications and surveying results. Data collection at the pipeline, power plant, and transmission tower began in mid June and continued periodically through out the Missouri River flood into October. Data was collected using a 400 kHz Reson SeaBat™ 7125 multibeam echosounder in conjunction with a Applanix POS-MV™ motion sensing system including an inertial measurement unit and RTK GPS and HYPACK®/HYSWEEP® navigation software. 2011 Raw HSX data files from HYPACK®/HYSWEEP® were opened in Caris HIPS and SIPS software. Speed of sound profile and tide corrections were applied. Total Propagated Uncertainty was calculated and used to create a Combined Uncertainty and Bathymetric Estimator (CUBE) surface with cells 0.5 m x 0.5 m. Unknown The CUBE surface was evaluated and edited as needed in Caris HIPS and SIPS software. Unknown The final CUBE surface was exported as xyz text files and Caris Spatial Archive (CSAR) files. Unknown Vector Entity point 301926 Universal Transverse Mercator 14 1 0 0 500000 0 coordinate pair 0.0000000268092437138989 0.0000000268092437138989 meters North American Datum of 1983 Geodetic Reference System 80 6378137 298.25722210088 North American Vertical Datum of 1988 0.001 meters Explicit elevation coordinate included with horizontal coordinates pp1798J_NorthOmahaCoal_PowerPlant_20111014.csar Hydrographic data gridded using a grid of 0.5 meter by 0.5 meter cells with data in UTM zone 14 North and NAVD88- meters U.S. Geological Survey Depth Z or elevation value in NAVD88 meters U.S. Geological Survey 283.75 295.85 meters 0.01 20111014 0.1 Estimate based on equipment specifications and surveying results. None planned Std_Dev standard deviation in meters of the data points contributing to the chosen hypothesis for each 0.5 m x 0.5 m grid cell. U.S. Geological Survey 0.00 3.17 meters 0.01 20111014 0.01 Estimate based on software significant figures. None planned Bounding Polygon Polygon representing the survey area U.S. Geological Survey Polygon 20111014 0.08 Estimate based on equipment specifications and surveying results. None planned U.S. Geological Survey Michael Ierardi IT Specialist mailing and physical

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov Downloadable Data The U.S. Geological Survey makes no guarantee nor offers any warranty concerning the accuracy, condition, or application of the information contained in this geographic data release. Although these data have been used successfully on computers of the USGS, no warranty, expressed or implied, is made by WRD regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits, arising out of the delivery, installation, operation, or use of these data. This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. CSAR 1 CSAR CSAR files can be opened utilizing the freeware program CARIS Easy View 4.0. The Online linkage, http://www.caris.com/products/easy-view/, contains all the needed information for downloading and installing the program. Zipped 8.16 https://water.usgs.gov/GIS/dsdl/pp1798J_NorthOmahaCoal_PowerPlant_20111014_csar.zip Access links through the USGS Publications Warehouse associated with the Larger Works Citation. Access the freeware program from http://www.caris.com/products/easy-view/. ASCII 1 Text x,y,z data from hydrographic surveys Zipped 1.0 https://water.usgs.gov/GIS/dsdl/pp1798J_NorthOmahaCoal_PowerPlant_20111014_txt.zip Access links through the USGS Publications Warehouse associated with the Larger Works Citation. Access the freeware program from http://www.caris.com/products/easy-view/. None. This dataset is provided by the USGS as a public service. 20201117 U.S. Geological Survey Ask USGS - Water Webserver Team mailing

445 National Center

Reston Virgina 20192 US 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998