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Bridge conditions in Jackson County, Colorado

47 inventoried bridges · 2 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

2 of the 47 bridges the federal inventory lists in Jackson County are rated poor; the rest split 13 good and 32 fair.

2 of the 47 bridges in Jackson County, Colorado, are rated in poor condition (4.3%) in the 2025 National Bridge Inventory, as of August 20, 2026.
13 bridges (27.7%) are rated good and 32 (68.1%) fair.
The median Jackson County bridge was built in 1984.
The busiest poor-rated bridge is SH 125 Ml over Willow Creek (built 1955), carrying about 220 vehicles a day.

Good 27.7% · Fair 68.1% · Poor 4.3% of 47 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
SH 125 Ml over Willow Creek	1955	220	Poor
County Road 27 over Illinois River	1980	108	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
SH 125 Ml over Michigan River	2012	2,400	Good
SH 125 Ml over Illinois River	1993	2,200	Good
SH 14 Ml over Grizzly Creek	1949	1,300	Fair
SH 14 Ml over Grizzly Creek	1950	1,300	Fair
SH 14 Ml over Colorado Creek	1949	1,300	Fair
SH 14 Ml over Arapahoe Creek	1950	1,300	Fair
SH 14 Ml over Grizzly Creek	2005	1,300	Good
SH 125 Ml over Canadian River	1981	940	Fair
SH 14 Ml over Michigan River	1978	490	Fair
SH 125 Ml over North Platte River	1986	420	Good

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of Colorado: Colorado bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.