Local over Boyer River
Sac County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Local over Boyer River in Sac County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1916, making it 109 years old at the 2025 inventory.
- It carries about 60 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 65 of the 221 inventoried bridges in Sac County rated poor (29.4%); 65 (29.4%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2023, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.48907, -95.18294)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Steel through truss |
| Length | about 92 ft |
| Location | 089373501 |
| NBI structure number | 000000000301930 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Sac County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 20 over Unnamed Stream | 2017 | 4,850 | Good |
| E Main St over Raccoon River | 2004 | 3,853 | Good |
| US 20 EB US 71 SB over North Raccoon River | 2012 | 3,300 | Good |
| US 20 WB US 71 NB over North Raccoon River | 2012 | 3,300 | Good |
| US 20 EB over Cedar Creek | 2012 | 2,950 | Good |
| US 20 WB over Cedar Creek | 2012 | 2,950 | Good |
All bridges nearby: Sac County, IA bridge conditions · every bridge in Sac County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.