What is the frost line in San Juan county wa?

The frost line, or frost depth, in San Juan County, Washington, typically ranges from 12 to 18 inches below the surface. This depth indicates where the ground may freeze during winter months, affecting construction practices and landscaping. Builders often consider this measurement to ensure proper foundation depth for structures to prevent frost heave. It's important to consult local guidelines for specific projects, as frost depth can vary based on microclimates.