Structure 57001803.30028 · Jackson County, CO
Carries County Road 18 over Mallon Ditch, 3.3 Mi W Of Co RD 12w.
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 through arch.
| State | Colorado |
| County | Jackson |
| Location | 3.3 Mi W Of Co RD 12w |
| Carries | County Road 18 |
| Crosses | Mallon Ditch |
| Coordinates | 40.69442, -106.44163 |
| Material | Steel |
| Design | Arch - Thru |
| Total Length | 23.6 ft (7.2 m) |
| Max Span | 23.6 ft (7.2 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 95.0 sq m |
| Main Spans | 1 |
| Year Built | 1986 |
| Avg Daily Traffic | 146 (2023) |
| Truck Traffic | 16% |
| Lanes On Bridge | 2 |
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 57001803.30028 |
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.