Benton County, OR Roof Snow Load - Case Study Area
What "Case Study" means for Benton County
ASCE 7's own snow load map has no single figure for Benton 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 41003, population 98,899. 386 US counties get this same case-study treatment; Benton County is one of them.
Benton County, OR: quick facts
- Population98,899
- Annual snowfall, NOAA normal5.3 in.
- FIPS41003
Benton County: average annual snowfall
Benton County sees about 5.3 in. of snow most winters, per the CORVALLIS WATER BUREAU, OR US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Benton County's figure
The figure above assumes the case ASCE 7-22 treats as typical: a heated, ordinary-occupancy home on a partially exposed site. Change any of those - exposure, heating, roof pitch, occupancy category - and the real design number moves.
A building permit needs the number at your exact address, not the county average - the free ASCE 7 Hazard Tool returns that from your coordinates in about a minute and produces a PDF a plan reviewer will accept. (How this figure is calculated.)