Structure J-04-AY · Montrose County, CO
Carries SH 348 Ml over Ironstone Canal, 0.8 Mi W Of Olathe.
A culvert 20 ft across with 2 openings. 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, so those are drawn as typical for a culvert.
| State | Colorado |
| County | Montrose |
| Location | 0.8 Mi W Of Olathe |
| Carries | SH 348 Ml |
| Crosses | Ironstone Canal |
| Coordinates | 38.60556, -108.00864 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 9.2 ft (2.8 m) |
| Deck Width | 44.9 ft (13.7 m) |
| Deck Area | 83.6 sq m |
| Main Spans | 2 |
| Year Built | 1982 |
| Avg Daily Traffic | 2,300 (2020) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Last Inspection | March 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | J-04-AY |
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.