Kootenai County, ID Roof Snow Load - Case Study Area
Kootenai County, ID: no map figure, on purpose
ASCE 7's own snow load map has no single figure for Kootenai 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 16055, population 188,323. 386 US counties get this same case-study treatment; Kootenai County is one of them.
Kootenai County in numbers
- Population188,323
- Annual snowfall, NOAA normal56 in.
- FIPS16055
Kootenai County's snowfall, most winters
56 in. a year: that's Kootenai County's NOAA 1991-2020 snowfall normal, measured at SAINT MARIES, ID US (25.4 mi away). Worth noting: the nearest station reporting snowfall normals sits 25.4 mi from Kootenai County's center, so treat this as a regional figure rather than an exact one. See the density guide.
Before you rely on Kootenai County's number
Treat the Kootenai 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. (How this figure is calculated.)