Blaine County, MT Roof Snow Load - Case Study Area
What "Case Study" means for Blaine County
Blaine County sits in the mountain-west terrain where ASCE 7-22 §7.2 itself declines to give a contour figure - elevation changes too fast over short distances there for one number per county to mean anything. The code requires a site-specific study for a building here, not a look-up.
Blaine County, FIPS 30005, is home to 6,903 people - one of 386 US counties ASCE 7 itself routes around a map figure for.
Blaine County, MT: quick facts
- Population6,903
- Annual snowfall, NOAA normal41 in.
- FIPS30005
How much it actually snows in Blaine County
Most winters bring Blaine County roughly 41 in. of snow - NOAA's normal at HAVRE CITY CO AP, MT US, 37.3 mi off. That station is far enough away (37.3 mi) that local snowfall - especially at a different elevation or near a lake - can run noticeably higher or lower than this figure. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Blaine County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.
Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Blaine County's county-wide figure. (How this figure is calculated.)