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County Road 100 over Empire Canal

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

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

County Road 100 over Empire Canal in Alamosa County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1991, making it 34 years old at the 2025 inventory.
It carries about 1,052 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 9 of the 15 inventoried bridges in Alamosa County rated fair (60.0%); 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	Steel stringer or multi-beam girder
Length	about 69 ft
Location	9.5 Mi SW of Alamosa
NBI structure number	003010004.8008A
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 160 Ml over Rio Grande	1966	13,000	Fair
US 285 Ml over Rock Creek	1960	5,900	Good
State St (CR 650) over Rio Grande River	1982	1,994	Fair
SH 368 Ml over Alamosa Farm Laterl Cana	1955	230	Fair
SH 368 Ml over Empire Irrigation Canal	1955	230	Good
County Rd. 12 Mile over Empire Canal	1990	132	Good