FM over Tarkio Creek Trib
Montgomery County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- FM over Tarkio Creek Trib in Montgomery County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, 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 219 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 52 of the 209 inventoried bridges in Montgomery County rated poor (24.9%); 52 (24.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated May 2024, 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 → (40.91544, -95.10447)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 3 | 3 | Serious condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 95 ft |
| Location | 071373301 |
| NBI structure number | 000000000254570 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| 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 Montgomery County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ia 48 over Stream | 1931 | 7,600 | Fair |
| US 34 over East Nishnabotna River | 1964 | 4,460 | Fair |
| Ia 48 over Red Oak Creek | 1918 | 4,460 | Fair |
| US 34 over Indian Creek | 1964 | 4,030 | Fair |
| US 34 over Crabapple Creek | 1964 | 4,030 | Fair |
| US 34 over West Tarkio Creek | 1964 | 3,990 | Fair |
All bridges nearby: Montgomery County, IA bridge conditions · every bridge in Montgomery County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.