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Single-beam bathymetric survey of the French Broad River near the Interstate 26 located bridge south of Asheville, NC – December 2020, Mid-Construction #1

Metadata Updated: October 30, 2025

In January 2020, the North Carolina Department of Transportation (NCDOT) began work on the Interstate 26 (I 26) highway widening project that involves a bridge crossing over the French Broad River (FBR) near Asheville, North Carolina. The U.S Geological Survey (USGS) in cooperation with the NCDOT conducted a pre-construction bathymetric survey of the streambed in June 2019 (Whaling and Wagner, 2021) within a one-kilometer reach of the FBR at the bridge construction site. A canoe-based repeat bathymetric survey was collected with a single-beam echosounder approximately 11 months after construction began, with the purpose to monitor geomorphological changes to the streambed and inform the NCDOT of potential impacts from construction activities. The survey extended from 300 meters (m) upstream to 700 m downstream from the bridge. Depth data were collected using a canoe-mounted CEESCOPE single-beam echosounder manufactured by CEE Hydrosystems. Position and elevation data were collected using an SBG Ellipse-D, a dual antenna Real-Time Kinematic (RTK) Inertial Navigation System (INS). The final dataset provides position data in three dimensions with units of meters supplied in a “XYZ” file. The data are projected in Universal Transverse Mercator (UTM) coordinate system, zone 17 north, horizontally referenced to the North American Datum of 1983 (NGS, 2018a), 2011 realization (NAD83 2011), and vertically referenced to the North American Vertical Datum of 1988 (NAVD88; NGS, 2018b).

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date September 13, 2025
Metadata Updated Date October 30, 2025

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date September 13, 2025
Metadata Updated Date October 30, 2025
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/usgs-6408f0c7d34e76f5f75e5065
Data Last Modified 2023-12-04T00:00:00Z
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 0764435d-43d7-416f-8802-05cb1cd6ec55
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Old Spatial -82.5876, 35.5110, -82.5770, 35.5141
Source Datajson Identifier True
Source Hash d67707e84d8bb77421642a0a2d7345f7f188a064a5436c6700cfd7e86041a65f
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -82.5876, 35.5110, -82.5876, 35.5141, -82.5770, 35.5141, -82.5770, 35.5110, -82.5876, 35.5110}

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