Local over Davisons Creek
Marshall County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Local over Davisons Creek in Marshall County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1978 and reconstructed in 2001, making it 47 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 130 of the 303 inventoried bridges in Marshall County rated poor (42.9%); 130 (42.9%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: deck 8 to 6.
- Its most recent inspection on record is dated November 2024, on a 12-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (41.99496, -92.80433)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 3 | 3 | Serious condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 34 ft |
| Location | 083171404 |
| NBI structure number | 000000000242430 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Marshall County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 30 over Davisons Creek | 1954 | 14,700 | Fair |
| Ia 14 over Linn Creek | 1985 | 13,300 | Good |
| Ia 14 over UP RR Madison&market St | 1985 | 13,300 | Fair |
| So. 6TH St. over Linn Creek | 1984 | 11,300 | Fair |
| So Center St over Linn Creek | 1951 | 10,448 | Poor |
| So Center St over RR and Madison St | 1951 | 9,491 | Poor |
All bridges nearby: Marshall County, IA bridge conditions · every bridge in Marshall County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.