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Forest Road 305 over M Thompson CR

Pitkin County, Colorado · rated Fair in the 2025 National Bridge Inventory

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

Forest Road 305 over M Thompson CR in Pitkin County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1956, making it 69 years old at the 2025 inventory.
It carries about 10 vehicles a day (traffic count year 1994).
It is one of 42 of the 65 inventoried bridges in Pitkin County rated fair (64.6%); 0 (0.0%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Timber stringer or multi-beam girder
Length	about 23 ft
Location	7.8 Mi SW of Carbondale
NBI structure number	021503000001031
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.

Bridge	Built	Vehicles/day	Condition
SH 82 Ml over Co Rd Castle Creek	1961	25,000	Fair
SH 82 Ml Ebnd over Draw	2005	22,000	Good
SH 82 ML-S/E Bound over Draw	2004	22,000	Good
SH 82 Ml Ebnd over Draw	2003	22,000	Good
SH 82 Ml over Stage Road	1994	22,000	Good
SH 82 Ml over Maroon Creek	2005	22,000	Fair