Powell County, MT Roof Snow Load - Case Study Area
Powell County, MT: no map figure, on purpose
Powell 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.
Powell County, FIPS 30077, is home to 7,120 people - one of 386 US counties ASCE 7 itself routes around a map figure for.
Powell County at a glance
- Population7,120
- Annual snowfall, NOAA normal30.5 in.
- FIPS30077
How much it actually snows in Powell County
Most winters bring Powell County roughly 30.5 in. of snow - NOAA's normal at DRUMMOND AVIATION, MT US, 18.4 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Powell 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 Powell County's county-wide figure. Details: the calculation guide.