FM over Frost Creek
Guthrie County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- FM over Frost Creek in Guthrie 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 1959, making it 66 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 94 of the 263 inventoried bridges in Guthrie County rated poor (35.7%); 94 (35.7%) 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 November 2023, on a 12-month routine inspection cycle.
- 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 → (41.71809, -94.6669)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 3 | 3 | Serious condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 43 ft |
| Location | 080332302 |
| NBI structure number | 000000000169540 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | November 2023 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Guthrie County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ia 44 over Bays Branch Creek | 1981 | 3,460 | Good |
| Ia 44 over Branch Mosquito Creek | 1981 | 3,460 | Fair |
| Ia 25 over South Raccoon River | 1983 | 3,200 | Good |
| Ia 44 over Brushy Creek | 1972 | 3,200 | Fair |
| Ia 44 over Middle Raccoon River | 1972 | 3,200 | Fair |
| Ia 141 over Dry Run Creek | 2004 | 2,160 | Good |
All bridges nearby: Guthrie County, IA bridge conditions · every bridge in Guthrie County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.