Single-beam bathymetric survey of the French Broad River near the Interstate 26 bridge located South of Asheville, NC – June 2019, Pre-construction
Dates
Publication Date
2021-03-09
Start Date
2019-06-28
End Date
2019-06-29
Citation
Whaling, A.R. and Wagner, D.M., 2021, Single-beam bathymetric survey of the French Broad River near the Interstate 26 bridge located South of Asheville, NC – June 2019, Pre-construction: U.S. Geological Survey data release, https://doi.org/10.5066/P9UP7SUO.
Summary
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. To track potential impacts from construction activities, the U.S. Geological Survey (USGS) in cooperation with the NCDOT conducted a single-beam bathymetric survey in June of 2019, approximately seven months before construction began. The survey extended from 300 meters (m) upstream to 500 m downstream from the I 26 bridge located south of Asheville, North Carolina. Depth data were collected using a CEESCOPE single-beam echosounder mounted to a canoe. Position and elevation data were collected using Real-Time [...]
Summary
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. To track potential impacts from construction activities, the U.S. Geological Survey (USGS) in cooperation with the NCDOT conducted a single-beam bathymetric survey in June of 2019, approximately seven months before construction began. The survey extended from 300 meters (m) upstream to 500 m downstream from the I 26 bridge located south of Asheville, North Carolina. Depth data were collected using a CEESCOPE single-beam echosounder mounted to a canoe. Position and elevation data were collected using Real-Time Kinematic (RTK) global positioning system technology following the single-base RTK approach outlined by Rydlund and Densmore (2012). 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).
Click on title to download individual files attached to this item.
bathy_XYZ_201906_FBR_FA1.xyz
3.91 MB
chemical/x-xyz
bathy_XYZ_201906_FBR_FA1_FDGC.xml Original FGDC Metadata
View
26.73 KB
application/fgdc+xml
Purpose
Bathymetric data were collected to characterize streambed morphology in the reaches upstream and downstream from the I 26 bridge crossing over the French Broad River near Asheville, NC. The first survey of the project sets a baseline to which future surveys will be compared. Subsequent bathymetric surveys over the same reach of the French Broad River will allow for periodic geomorphological assessments that may be used to inform the North Carolina Department of Transportation of potential impacts from construction activities.
