Structure 23718 · Canyon County, ID
Carries Parma Road over D Line Canal, 2.4 N. 0.4 E. Parma.
23 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 tee-beam bridge.
| State | Idaho |
| County | Canyon |
| Location | 2.4 N. 0.4 E. Parma |
| Carries | Parma Road |
| Crosses | D Line Canal |
| Coordinates | 43.82076, -116.93412 |
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 23.0 ft (7 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 63.7 sq m |
| Main Spans | 1 |
| Year Built | 1971 |
| Avg Daily Traffic | 90 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | Other Local Agencies |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000023718 |
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.