Surficial sediment data on the North Fork Stillaguamish River and State Route 530 landslide near Oso, Washington
These tables document grain-size distributions of sediment collected as part of a study on the geomorphic impacts of the March 2014 State Route 530 Landslide near Oso, Washington. This includes samples of material from the landslide deposit itself, covering a range of distinct facies present in the landslide, and samples of sand and gravel at various locations along the North Fork Stillaguamish River both upstream and downstream of the landslide. Grain size distributions of landslide material were distinguished between outwash material, till, and lacustrine material, distinct facies all present in the landslide deposit. Material coarser than 4-16 mm (sample dependent) was sieved and weighed in the field, and fine material was retained and analyzed at the Cascade Volcanoes Observatory Sediment lab. Bulk densities were measured for a subset of the samples. Grain size data for the North Fork Stillaguamish was collected via surficial pebble counts. All samples from 2014 and 2015 were collected by USGS. All samples prior to 2014 were collected by the Stillaguamish Tribe of Indians and provided to the USGS.
|Surficial sediment data on the North Fork Stillaguamish River and State Route 530 landslide near Oso, Washington
|Scott W Anderson
|USGS Digital Object Identifier Catalog
|Washington Water Science Center
Digital elevation models of the State Route 530 landslide near Oso, Washington, July 2014 to July 2015
In the immediate aftermath of the SR530 Landslide, the USGS supported first responders and decision-makers as a key member of the collaborative effort to monitor the stability of the landslide deposit and the associated impoundment of the North Fork Stillaguamish River during rescue operations. With the initial disaster response now over, longer-term questions have arisen regarding the stability...
Digital elevation models of the State Route 530 landslide near Oso, Washington, July 2014 to July 2015Digital elevation models of the SR530 Landslide, created using structure from motion photogrammetry. These surveys were performed at irregular intervals between July 1, 2014 and July 7, 2015. Due to the photogrammetric methods used to collect these surveys, there may be substantial artifacts near the edges of the surveys, in areas of vegetation, or over extents of bare water, and should be used wi