New Landslide Inventory of Western Whatcom County Published

We are pleased to announce the publication of our Landslide Inventory of Western Whatcom County.


Landslide Inventory of Western Whatcom County, Washington


An updated inventory of landslides was produced by interpreting 1,398 mi2 of lidar data in western Whatcom County. Following published protocols, mapping yielded 1,911 landslides and 2,470 fans. High landslide density was noted along river corridors and in upland areas of the Cascade Range. This updated landslide inventory will increase awareness of landslide hazards in western Whatcom County and provide information for planners, emergency managers, public works departments, and those who live and work where landslides could impact their daily lives.

Suggested Citation: Mickelson, K. A.; Contreras, T. A.; Gallin, W. N.; Jacobacci, K. E.; Slaughter, S. L., 2020, Landslide inventory of western Whatcom County, Washington: Washington Geological Survey Report of Investigations 42, 7 p. text, with an accompanying Esri file geodatabase.

You can also view these data and create custom landslide maps on the Washington Geologic Information Portal.

GIS Data for Download

The Survey also maintains two landslide databases: the Landslide Compilation and the new Landslide Inventory. Both datasets are updated on our Portal and are also available for download from our GIS Data and Databases webpage.

The new Inventory dataset follows a protocol that requires high-quality lidar data, available here. We will add new data to this dataset as new inventories are published.

The Landslide Compilation dataset is just that: a compilation of published landslide data from throughout our agency and other published sources, including reconnaissance inventories after large landslide events, geologic mapping, and other watershed studies. Many of the landslides shown in this dataset were mapped without the benefit of lidar. Thus, any new mapping published through the Inventory supersedes what is contained within the Compilation.