Dolores County, CO Shrink-Swell Risk
Dolores County, CO's soil, for shrink-swell risk
Low
Dolores County, CO: USDA's soil survey rates 66.5% of the county "Low" for shrink-swell potential (2.72% linear extensibility). That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.
What Dolores County's reading doesn't cover
Two lots a mile apart in Dolores County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).
What it costs to find out, versus to ignore it
With Dolores County, CO rating "Low", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. A geotechnical report runs $1,000-$5,000, typically around $2,700. Foundation repair, if a specific lot turns out to differ from the county average, runs $5,000-$15,000.
How Dolores County, CO compares
Nationally, Dolores County, CO is the 1,396-most-constrained of 3,085 rated counties for shrink-swell soil. Within Colorado alone it ranks 17 of 63. Dolores County, CO is 1,067 square miles with a population of 2,467.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Jefferson County, TN and Butte County, SD are worth a look for comparison.
How this reading is built, and its real limits · Moisture management: the cheap fix that works on any soil
More of Colorado
Every county in Colorado is on this site, including Routt County, CO and Weld County, CO. The full underlying dataset is downloadable directly, one row per county.