Structure 21501000003015 · Pitkin County, CO
Carries Fdr 121 over Castle CR, 1.9mi S Of Ashcroft.
24 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 multi-beam bridge.
| State | Colorado |
| County | Pitkin |
| Location | 1.9mi S Of Ashcroft |
| Carries | Fdr 121 |
| Crosses | Castle CR |
| Coordinates | 39.02501, -106.80583 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 16.4 ft (5 m) |
| Deck Area | 36.5 sq m |
| Main Spans | 1 |
| Year Built | 1972 |
| Avg Daily Traffic | 10 (1994) |
| Lanes On Bridge | 1 |
| Last Inspection | July 2023 |
| Inspection Frequency | Every 24 months |
| Owner | U.S. Forest Service |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 4 — Foundations need monitoring |
| Structure Number | 021501000003015 |
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.