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Calhoun-byers Road over Bijou Creek

Adams County, Colorado · rated Poor in the 2025 National Bridge Inventory

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

Calhoun-byers Road over Bijou Creek in Adams County, Colorado, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1965, making it 60 years old at the 2025 inventory.
It carries about 165 vehicles a day (traffic count year 2021).
Its listed owner is the county highway agency.
It is one of 41 of the 544 inventoried bridges in Adams County rated poor (7.5%); 41 (7.5%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Prestressed concrete tee beam
Length	about 359 ft
Location	0.40 Mi N of 72ND Ave
NBI structure number	ADA46N-076.0163
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Hov Ramp over I25 Access	1993	242,000	Good
I 25 Ramp over Hov Ramp R	1998	242,000	Good
I 25 Ml over 62ND Ave	1993	196,000	Fair
I 25 Ml over UP RR	1993	196,000	Fair
US 36 Ebnd Ml over I 25 Ml Ramps Hov Lanes	1994	168,000	Good
I 25 Ml over Pedestrian Underpass	1955	154,000	Fair