Structure 11WC0185 · Grant County, WA
Carries Maintenance Road over West Canal, Dry Coulee Siphon 1 Outle.
A culvert 25 ft across. 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 | Washington |
| County | Grant |
| Location | Dry Coulee Siphon 1 Outle |
| Carries | Maintenance Road |
| Crosses | West Canal |
| Coordinates | 47.41716, -119.38671 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Area | 30.4 sq m |
| Main Spans | 1 |
| Year Built | 1946 |
| Avg Daily Traffic | 5 (2022) |
| Lanes On Bridge | 1 |
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Reclamation |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 6 — Scour calculated, stable |
| Structure Number | 11WC0185 |
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.