Skamania County, WA Roof Snow Load - Case Study Area
What "Case Study" means for Skamania County
ASCE 7's own snow load map has no single figure for Skamania County: the terrain is complex enough that the code (§7.2) requires an elevation-specific study rather than a county-wide value. That is the map being accurate, not a data gap.
FIPS 53059, population 12,660. 386 US counties get this same case-study treatment; Skamania County is one of them.
Skamania County in numbers
- Population12,660
- Annual snowfall, NOAA normal55 in.
- FIPS53059
Skamania County's snowfall, most winters
55 in. a year: that's Skamania County's NOAA 1991-2020 snowfall normal, measured at CARSON FISH HATCHERY, WA US (10.9 mi away). See the density guide.
Before you rely on Skamania County's number
Treat the Skamania County figure as a starting point, not a final answer: it assumes standard occupancy, a heated structure and a moderately sheltered site, per ASCE 7-22's own defaults. Exposed terrain, an unheated building or a steeper roof all shift the real number.
For a real application, skip the county number and go straight to the ASCE 7 Hazard Tool - enter your coordinates and it returns a site-specific figure a plan reviewer will recognize. See the methodology guide.