Bathymetric Surveys of the White River at the U.S. Army Corps of Engineers Fish Passage Facility, December 2020 to September 2022

The U.S. Army Corps of Engineers Fish Passage Facility, located on the White River, Washington State, collects upstream-migrating fish and transfers them to trucks, allowing the fish to access the watershed upstream of Mud Mountain Dam. The structure, constructed in 2019, includes an impoundment held by gates that can be raised or lowered remotely. Those gates are typically lowered during higher flows to allow sediment trapped in the impoundment to flush downstream. Starting in 2020, the USGS collected repeat bathymetric surveys of the White River in the immediate vicinity of the facility to help document how the local channel bed responded to various gate operation strategies. Surveys were generally conducted as soon as possible after high flows that exceeded 4,000 ft3/s.

Surveys were conducted using acoustic doppler current profilers (ADCPs) mounted on a remote-control boat, providing XY-depth data, combined with global navigation satellite system (GNSS) surveys used to measure water surface elevations and the location of waters edge. The data were used to construct continuous one-meter digital elevation models (DEMs) of the channel bed. The extent covered in a given survey varied between survey dates, primarily as a function of where water depths were sufficient to operate the ADCP, though all surveys covered the forebay just upstream of the impoundment. A total of ten surveys were conducted between December 15, 2020 and September 30, 2022.

Each survey is packaged into a zip file containing:

The final one-meter DEM
A csv of all GNSS data 
A csv of all xy-depth data from ADCPs 
A geopackage, containing the full set of final XYZ points used to construct the DEM, a polygon defining the extents of the DEM, lines defining the waters edge, where depth was enforced to be zero, and lines defining the linear referencing used to link ADCP and GNSS data;
A folder containing the original ADCP output in proprietary and ASCII formats;
an R script containing all processing steps used to construct the final DEM;
metadata specific to that survey date.

An additional folder ('white_fpf_supporting_scripts_data.zip') contains two R scripts, each containing custom functions used in processing the data, and a CSV of coordinates for the four control points used to validate survey datum in the later surveys. These are required in order for the scripts attached in each survey zip file to run.