Structure MESA-18.5-M.7 · Mesa County, CO
Carries County Road 18.50 over Grand Valley Canal, .7 Mi N Of Road M.
Set by its lowest-rated component: Deck and Substructure at 5 of 9.
How ratings work23 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 | Mesa |
| Location | .7 Mi N Of Road M |
| Carries | County Road 18.50 |
| Crosses | Grand Valley Canal |
| Coordinates | 39.20261, -108.71055 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 22.6 ft (6.9 m) |
| Max Span | 20.7 ft (6.3 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 50.4 sq m |
| Main Spans | 1 |
| Year Built | 1978 (reconstructed 1992) |
| Avg Daily Traffic | 417 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
| Last Inspection | January 2024 |
| 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 | MESA-18.5-M.7 |
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.