This data set contains 2,611 water levels collected by Natural Resources Districts in Central Nebraska. These water levels were collected by the districts to monitor groundwater levels within the districts. The water levels were provided to the USGS for use as calibration targets to the Elkhorn and Loup River Basin - Phase Three groundwater flow model. The water levels have not been previously published. This record serves as the publication record of the water levels in support of the Elkhorn and Loup River Basin - Phase Three groundwater flow model report.

This data set contains two sets of measured water-level data collected in an area between the Platte and Elkhorn Rivers just above their confluence. Surface-water and groundwater-level data were collected for two synoptic water-level surveys during a low-groundwater demand period in fall of 2016 and a high groundwater demand period in summer of 2017. Elevations of surface-water features were surveyed with a Global Navigations Satellite System rover receiver using a real-time network, where the rover receiver receives real-time position corrections from a central server through a mobile wireless fidelity (Wi-Fi) hotspot linked to the rover receiver. Data collection procedures ensured that positions and elevations achieved USGS Level-IV survey accuracy and surveyed surface-water elevations were generally within 0.25 ft. Groundwater level data were collected from wells screened in the Quaternary-age alluvial aquifer. Prior to the groundwater-level data collection, the elevation of the selected wells was surveyed using a single base real-time kinematic (RTK) approach to achieve Level-II survey accuracy. The vertical accuracy generally was within 0.15 ft for each observation well. During synoptic water-level and streamflow surveys, groundwater-level measurements were furnished by Papio-Missouri River Natural Resources District (NRD) and Lower Platte North NRD staff or by transducers in Omaha Municipal Utilities District (MUD) recorder wells. Groundwater elevations used from recorder wells were calculated from the daily-median groundwater level from hourly recorded measurements. Additional data and interpretations of this dataset (published in SIR XXXX) and the data included in this Data Release are intended to inform water managers of the effect of groundwater demand and flow conditions on groundwater movement and interaction with surface-water for the area near and immediately upstream from the confluence of the lower Platte and Elkhorn Rivers.

This data set contains two sets of measured water-level data collected in an area between the Platte and Elkhorn Rivers just above their confluence. Surface-water and groundwater-level data were collected for two synoptic water-level surveys during a low-groundwater demand period in fall of 2016 and a high groundwater demand period in summer of 2017. Elevations of surface-water features were surveyed with a Global Navigations Satellite System rover receiver using a real-time network, where the rover receiver receives real-time position corrections from a central server through a mobile wireless fidelity (Wi-Fi) hotspot linked to the rover receiver. Data collection procedures ensured that positions and elevations achieved USGS Level-IV survey accuracy and surveyed surface-water elevations were generally within 0.25 ft. Groundwater level data were collected from wells screened in the Quaternary-age alluvial aquifer. Prior to the groundwater-level data collection, the elevation of the selected wells was surveyed using a single base real-time kinematic (RTK) approach to achieve Level-II survey accuracy. The vertical accuracy generally was within 0.15 ft for each observation well. During synoptic water-level and streamflow surveys, groundwater-level measurements were furnished by Papio-Missouri River Natural Resources District (NRD) and Lower Platte North NRD staff or by transducers in Omaha Municipal Utilities District (MUD) recorder wells. Groundwater elevations used from recorder wells were calculated from the daily-median groundwater level from hourly recorded measurements. Additional data and interpretations of this dataset (published in SIR XXXX) and the data included in this Data Release are intended to inform water managers of the effect of groundwater demand and flow conditions on groundwater movement and interaction with surface-water for the area near and immediately upstream from the confluence of the lower Platte and Elkhorn Rivers.

This data set contains two sets of water-level contours that represent interpreted water-levels for an area between the Platte and Elkhorn Rivers upstream of their confluence. The contours are informed by surface-water and groundwater-level data collected during a synoptic water-level survey completed during a low-groundwater demand period in fall of 2016 and a synoptic water-level survey completed during a high-groundwater demand period in summer of 2017. Additional data and interpretations of this dataset (published in SIR XXXX) and the data included in this Data Release are intended to inform water managers of the effect of groundwater demand and flow conditions on groundwater movement and interaction with surface-water for the area near and immediately upstream from the confluence of the lower Platte and Elkhorn Rivers.

This data set contains two sets of water-level contours that represent interpreted water-levels for an area between the Platte and Elkhorn Rivers upstream of their confluence. The contours are informed by surface-water and groundwater-level data collected during a synoptic water-level survey completed during a low-groundwater demand period in fall of 2016 and a synoptic water-level survey completed during a high-groundwater demand period in summer of 2017. Additional data and interpretations of this dataset (published in SIR XXXX) and the data included in this Data Release are intended to inform water managers of the effect of groundwater demand and flow conditions on groundwater movement and interaction with surface-water for the area near and immediately upstream from the confluence of the lower Platte and Elkhorn Rivers.

This point data set contains streamflow-measurement sites in the Elkhorn and Loup River basins and selected streamflow-measurement sites in the Niobrara and Platte River basins in north-central Nebraska. At these 531 sites, flows ranging from no flow to 2,600 cubic feet per second were measured or observed during November 8 to 21, 2006. Measurements were made by several different methods, including current meters, flumes, and acoustic Doppler velocimeters. Each measurement site location was recorded using a handheld global positioning system (GPS) unit and then downloaded and stored in a computer spreadsheet. Stored coordinates were used to produce point features in GIS native format.

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).

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).

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).

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).