Pallid Sturgeon Habitat Surveys in the Tongue River 2023-2024

Endangered pallid sturgeon (Scaphirhynchus albus) spawning habitats were mapped on the Tongue River near Miles, City Montana June in 2023 and 2024. Data quantify the physical characteristics of the river channel and flow; depth, velocity and habitat assessments using single-beam sonar, acoustic Doppler current profilers (ADCPs) in 2023 and single-beam sonar in 2024. Real-time kinematic Global Navigation Satellite Systems (GNSS) through a base station were used for positioning in 2023 and a Real-time GNSS correction network was used in 2024. In 2023 depths and velocities were mapped in a 1.6 kilometer long reach used by pallid sturgeon with transects that had a 15-meter spacing. In 2024 we surveyed a longitudinal profile of depth, water surface elevation, and bed elevation for 30.3 kilometers from just below Twelve Mile Dam to just upstream from the confluence with the Yellowstone River. Elevation control in 2024 used a real time virtual reference station correction subscription that utilized satellite-based elevation corrections.This dataset includes: Maps of depth and velocity for a 1.6 km long reach in 2023, raw ADCP points used to generate depth and velocity maps, raw ASCII ADCP data from transects used to generate depth and velocity maps, and a longitudinal bed and water surface profile of a 30.3 km long reach surveyed on 6/29/2024.