Moderate

ZIP Code 59259

Dawson County, Montana — Richey

30PSF (Ground Snow Load)
ModerateClassification

What This Means

Dawson County, Montana has a moderate ground snow load of 30 PSF per ASCE 7-22. This load requires proper structural consideration during design. Roof framing, trusses, and connections should be engineered for this snow load. Ensure adequate drainage to prevent ponding.

Snow Load Details

ZIP Code59259
CountyDawson
CityRichey
StateMontana (MT)
Ground Snow Load30 PSF — Moderate
Classification Range21 - 40 PSF
Data QualityMeasured

Source: ASCE 7-22 ground snow load polygons via ArcGIS

Roof Snow Load Calculator

ASCE 7-22 flat roof formula:  pf = 0.7 × Ce × Ct × Is × pg

Your ground snow load (pg): 30 PSF

Roof Snow Load: 21 PSF

ⓘ Simplified estimate for flat roofs. Sloped roofs, drift zones, and unbalanced loads need additional calculations. Consult a structural engineer for final design.

Dawson County Snow Load Map

Counties colored by snow load classification. Gray = No Load, Blue = Light, Amber = Moderate, Orange = Heavy, Red = Extreme, Purple = Case Study.

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Nearby ZIP Codes

59256 30 PSF Moderate 59257 30 PSF Moderate 59258 30 PSF Moderate 59260 25 PSF Moderate 59261 CS Case Study 59262 25 PSF Moderate

Frequently Asked Questions

What is the ground snow load for ZIP code 59259?

ZIP code 59259 is in Dawson County, Montana, with a ground snow load of 30 PSF, classified as moderate per ASCE 7-22.

Is my roof strong enough for snow in 59259?

With a moderate ground snow load of 30 PSF, standard residential construction typically handles this load, but verify with your local building code.

What county is ZIP code 59259 in?

ZIP code 59259 is in Dawson County, Montana (MT).