Pittsburgh Distict employs multibeam sonar
George Brkovich and Brett Kelly, who work as a team to conduct waterway surveys for U.S. Army Corps of Engineers Pittsburgh District, lower a multibeam sonar into the Allegheny River for a demonstration in Pittsburgh May 7, 2021. The sonar helps provide the district with digital imagery that can detect water depth, erosion or obstructions that may impact navigation on the Pittsburgh rivers. (U.S. Army Corps of Engineers Pittsburgh District photo by Michel Sauret)

Download Image: Full Size (4.11 MB)
Photo by: Michel Sauret |  VIRIN: 210507-A-TI382-519.JPG