THE DIRTBID REGIONAL MODEL · COLORADO
Sitework in Colorado on the same Richmond Metro = 1.00 scale as the rest of DirtBid: 8 cost regions and 64 counties, each with a soil-risk rating from USDA and USGS data. Denver Metro runs highest at 1.07×; Pueblo Metro lowest at 0.88×.
Colorado multipliers and county ratings are planning-level: built from federal price and soil data, and not yet checked against local bids or a local estimator.
Dominant ground: Ascalon, Bresser, Nunn
10 counties in this region. 5 of 10 rate high for shallow rock. 1 of 10 rate high for shrink-swell clay. Highest risk score: Adams County (4 of 10).
Counties: Adams County, Arapahoe County, Broomfield County, Clear Creek County, Denver County, Douglas County, Elbert County, Gilpin County, Jefferson County, Park County
Dominant ground: Bresser, Truckton, Blakeland
2 counties in this region. 1 of 2 rate high for shallow rock. Highest risk score: Teller County (5 of 10).
Counties: El Paso County, Teller County
Dominant ground: Needleton, Valent, Frisco
47 counties in this region. 21 of 47 rate high for shallow rock. USGS maps karst-prone rock across much of 2 of the 47. Highest risk score: Bent County (5 of 10).
Counties: Alamosa County, Archuleta County, Baca County, Bent County, Chaffee County, Cheyenne County, Conejos County, Costilla County, Crowley County, Custer County, Delta County, Dolores County, Eagle County, Fremont County, Garfield County, Grand County, Gunnison County, Hinsdale County, Huerfano County, Jackson County, Kiowa County, Kit Carson County, Lake County, La Plata County, Las Animas County, Lincoln County, Logan County, Mineral County, Moffat County, Montezuma County, Montrose County, Morgan County, Otero County, Ouray County, Phillips County, Pitkin County, Prowers County, Rio Blanco County, Rio Grande County, Routt County, Saguache County, San Juan County, San Miguel County, Sedgwick County, Summit County, Washington County, Yuma County
Dominant ground: Leighcan family, Boyle, Redfeather
1 county in this region. 1 of 1 rate high for shallow rock. Highest risk score: Larimer County (5 of 10).
Counties: Larimer County
Dominant ground: Ascalon, Olney, Valent
1 county in this region. Highest risk score: Weld County (4 of 10).
Counties: Weld County
Dominant ground: Leighcan family, Nunn, Cypher family
1 county in this region. 1 of 1 rate high for shallow rock. Highest risk score: Boulder County (4 of 10).
Counties: Boulder County
Dominant ground: Manvel, Minnequa, Penrose
1 county in this region. 1 of 1 rate high for shallow rock. USGS maps karst-prone rock across much of it. Highest risk score: Pueblo County (5 of 10).
Counties: Pueblo County
Dominant ground: Torriorthents, Persayo, Killpack
1 county in this region. 1 of 1 rate high for shallow rock. Highest risk score: Mesa County (4 of 10).
Counties: Mesa County
FAQ
From USDA soil survey data, the most common across the state: shallow rock (31 of 64 counties rate high), shrink-swell clay (1 of 64 counties rate high). A parcel can differ from its county, so read the survey for your exact site.
From the Commerce Department's Regional Price Parities, on the same Richmond Metro = 1.00 scale as Virginia. Across 29 reviewed regions that method missed by about 0.03 on average. They have not been checked against executed bids in Colorado, so use them for planning, not a final bid.
They are screening ratings from federal soil and geology data, not a local estimator's review and not a geotechnical report. Tested against 511 reviewed counties, they land within one level most of the time, and exact matches are less common. Get borings before you price a real site.
Soil Report
A $350 DirtBid AI Soil Report reads the official USDA survey for your exact parcel, flags the hazards above, and prices the risk — before you buy land or sign a contract.