Oliver County, ND Roof Snow Load - 24.5 psf
Oliver County, ND: your roof's ASCE 7 snow number, in plain English
Oliver County's roofs are built to hold 24.5 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 53.9 inches of fresh, light snow, 19.6 inches of old, settled snow, or as little as 4.9 inches of solid ice - snow that heavy is rare here but ice from a freeze-thaw cycle adds up far faster than the depth suggests. Modern-code homes carry a load like this without issue; an older addition, a carport, or any flat-roofed section is where it is worth checking first.
Oliver County, ND: quick facts
- Design roof snow load24.5 psf
- Ground snow load, ASCE 7 map35 psf
- National rank#374 of 2,758
- North Dakota rank#42 of 49
- Population1,882
- Annual snowfall, NOAA normal44.5 in.
- FIPS38065
Oliver County by the numbers
Nationally that's #374 out of 2,758 rated counties, the top 14%; within North Dakota alone, Oliver County ranks #42 of 49. North Dakota counties average 29.4 psf; Oliver County runs 4.9 psf lower than that.
Oliver County, FIPS 38065, is home to 1,882 people near 47.1181°N 101.3314°W. Its 35 psf ground snow load figure is the map value; 24.5 psf is what a roof is actually designed for.
Oliver County's snowfall, most winters
44.5 in. a year: that's Oliver County's NOAA 1991-2020 snowfall normal, measured at NEW SALEM 5NW, ND US (17.3 mi away). See the density guide.
Before you rely on Oliver County's number
Treat the Oliver 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. Details: the calculation guide.