Structure A-18-25 · Jefferson County, CO
Carries County Road 74 | U over Upper Bear Creek, 4.5 Mi W Evrgn Lake Jct.
23 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a deck arch.
| State | Colorado |
| County | Jefferson |
| Location | 4.5 Mi W Evrgn Lake Jct |
| Carries | County Road 74 | U |
| Crosses | Upper Bear Creek |
| Coordinates | 39.63672, -105.39727 |
| Material | Steel |
| Design | Arch - Deck |
| Total Length | 23.3 ft (7.1 m) |
| Max Span | 23.0 ft (7 m) |
| Deck Width | 27.6 ft (8.4 m) |
| Deck Area | 59.6 sq m |
| Main Spans | 1 |
| Year Built | 1954 |
| Avg Daily Traffic | 1,046 (2020) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Last Inspection | March 2025 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | A-18-25 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.