Rio Arriba County, NM Roof Snow Load - Case Study Area
What "Case Study" means for Rio Arriba County
ASCE 7's own snow load map has no single figure for Rio Arriba 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 35039, population 39,955. 386 US counties get this same case-study treatment; Rio Arriba County is one of them.
Rio Arriba County at a glance
- Population39,955
- Annual snowfall, NOAA normal35.7 in.
- FIPS35039
Rio Arriba County: average annual snowfall
Rio Arriba County sees about 35.7 in. of snow most winters, per the EL VADO DAM, NM US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Rio Arriba 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.)