County Road 31d over Big Thompson River
Fair Condition48 years old248 vehicles/day
Location
| State | Colorado |
| County | Larimer |
| Location | 0.1 Mi N Of Co RD 22h |
| Carries | County Road 31d |
| Crosses | Big Thompson River |
| Coordinates | 40.42152, -105.22091 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 132.9 ft (40.5 m) |
| Max Span | 42.3 ft (12.9 m) |
| Deck Width | 33.5 ft (10.2 m) |
| Deck Area | 413.1 sq m |
| Main Spans | 3 |
| Year Built | 1978 |
Traffic
| Avg Daily Traffic | 248 (2023) |
| Truck Traffic | 19% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | LR31D-0.1-22H |