Structure 361170 · Polk County, IA
Carries Ia 415 over Saylorville Reservoir, West Of Polk City.
4,933 ft end to end, longest span 216 ft: about 14 football fields. 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 | Iowa |
| County | Polk |
| Location | West Of Polk City |
| Carries | Ia 415 |
| Crosses | Saylorville Reservoir |
| Coordinates | 41.76363, -93.73231 |
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 4933.1 ft (1503.6 m) |
| Max Span | 215.9 ft (65.8 m) |
| Deck Width | 32.2 ft (9.8 m) |
| Deck Area | 14735.3 sq m |
| Main Spans | 25 |
| Year Built | 1973 |
| Avg Daily Traffic | 10,100 (2022) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Last Inspection | September 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 000000000361170 |
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.