Structure 21845 · Canyon County, ID
Carries Sma8353;16th AVE over Uprr;1st ST N, In Nampa;16th AVE.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.
How ratings work766 ft end to end, longest span 112 ft: about 2.1 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. 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 | Idaho |
| County | Canyon |
| Location | In Nampa;16th AVE |
| Carries | Sma8353;16th AVE |
| Crosses | Uprr;1st ST N |
| Coordinates | 43.57633, -116.55511 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 766.1 ft (233.5 m) |
| Max Span | 111.9 ft (34.1 m) |
| Deck Width | 66.9 ft (20.4 m) |
| Deck Area | 4763.4 sq m |
| Main Spans | 11 |
| Year Built | 1969 (reconstructed 2009) |
| Avg Daily Traffic | 20,000 (2023) |
| Truck Traffic | 2% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 4 |
| Last Inspection | September 2023 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | Not applicable |
| Structure Number | 000000000021845 |
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.