If you have been seeing these vessels working the river from shore to shore, alongside marinas and docks here is what’s going on. It will be interesting to see the final product.
David Evans and Associates will be conducting hydrographic surveys in support of NOAA on the Columbia and Willamette Rivers through February 2026. From 16 Sep – 15 Oct, operations will occur between Knapp Landing (RM 95) and the Bonneville Dam (RM 145). Survey vessels BRENNAN, SEAHAWK, and BROUGHTON will operate daily during daylight hours, seven days per week. All vessels will be equipped with AIS and will monitor VHF channels 13 and 16.