Geomorphic Monitoring Associated with the 2020 Pilchuck Dam Removal

The Pilchuck Dam, a low-head dam previously used for water-supply diversion in Snohomish County, Washington was removed from the Pilchuck River in the summer of 2020 after having blocked upstream fish migration for over a century. That removal effort was led by the Tulalip Indian Tribe; the USGS, in collaboration with the tribe, monitored sediment evacuation from the impoundment and downstream channel response over the year after the removal. Monitoring efforts included repeat cross sections, stage monitoring, and time lapse photography. This data release includes those raw data and summarizes their collection and processing. The data release includes three zip files, containing multiple files associated with each monitoring element; these generally include CSVs of raw data and metadata files. Time lapse imagery was collected at two locations; all images from both installations were downscaled from 6000x4000 pixel images to 1500x1000 pixel images and uploaded as a single zip file. A map showing the spatial arrangement of the monitoring elements has been included with this data release.