Bon Homme County, SD Roof Snow Load - 28 psf
Bon Homme County, SD: your roof's ASCE 7 snow number, in plain English
Bon Homme County's roofs are built to hold 28 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 61.6 inches of fresh, light snow, 22.4 inches of old, settled snow, or as little as 5.6 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.
Bon Homme County at a glance
- Design roof snow load28 psf
- Ground snow load, ASCE 7 map40 psf
- National rank#273 of 2,758
- South Dakota rank#30 of 65
- Population7,071
- Annual snowfall, NOAA normal36.6 in.
- FIPS46009
Bon Homme County by the numbers
Nationally that's #273 out of 2,758 rated counties, the top 10%; within South Dakota alone, Bon Homme County ranks #30 of 65. That's 0.2 psf below South Dakota's own county-average design load of 28.2 psf.
Bon Homme County, FIPS 46009, is home to 7,071 people near 42.9857°N 97.8842°W. Its 40 psf ground snow load figure is the map value; 28 psf is what a roof is actually designed for.
Bon Homme County's snowfall, most winters
36.6 in. a year: that's Bon Homme County's NOAA 1991-2020 snowfall normal, measured at TYNDALL, SD US (0.8 mi away). See the density guide.
Before you rely on Bon Homme County's number
Treat the Bon Homme 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.