County Road 108 over Costilla Canal
Alamosa County, Colorado · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Road 108 over Costilla Canal in Alamosa County, Colorado, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1997, making it 28 years old at the 2025 inventory.
- It carries about 49 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 6 of the 15 inventoried bridges in Alamosa County rated good (40.0%); 0 (0.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (37.54424, -105.89415)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 34 ft |
| Location | 2 Mi W of SH17 |
| NBI structure number | 003010812.9002A |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Alamosa County
| 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 |
| County Road 100 over Empire Canal | 1991 | 1,052 | Fair |
| SH 368 Ml over Alamosa Farm Laterl Cana | 1955 | 230 | Fair |
| SH 368 Ml over Empire Irrigation Canal | 1955 | 230 | Good |
All bridges nearby: Alamosa County, CO bridge conditions · every bridge in Alamosa County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.