Summit County, CO Roof Snow Load - Case Study Area
What "Case Study" means for Summit County
ASCE 7's own snow load map has no single figure for Summit 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 08117, population 30,882. 386 US counties get this same case-study treatment; Summit County is one of them.
Summit County at a glance
- Population30,882
- Annual snowfall, NOAA normal115.5 in.
- FIPS08117
Summit County's snowfall, most winters
115.5 in. a year: that's Summit County's NOAA 1991-2020 snowfall normal, measured at DILLON 1 E, CO US (5.5 mi away). See the density guide.
Before you rely on Summit County's number
Treat the Summit 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.)