310TH Street over Mid Tarkio Creek
Page County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 310TH Street over Mid Tarkio Creek in Page 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 1968, making it 57 years old at the 2025 inventory.
- It carries about 329 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 56 of the 191 inventoried bridges in Page County rated poor (29.3%); 56 (29.3%) 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 October 2022, on a 24-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 → (40.59657, -95.30168)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 112 ft |
| Location | 067392701 |
| NBI structure number | 000000000039040 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2022 |
| Inspection interval (item 91) | 24 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 Page County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 59 over Johnson Run Creek | 1960 | 8,100 | Fair |
| US 71 over Stream | 1972 | 3,450 | Fair |
| US 71 over Stream | 1972 | 3,410 | Fair |
| US 71 & Ia 2 over West Nodaway River | 1972 | 3,360 | Fair |
| Ia 2 over Snake Creek | 1991 | 3,170 | Good |
| US 71 over Drainage Ditch | 1973 | 3,000 | Fair |
All bridges nearby: Page County, IA bridge conditions · every bridge in Page County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.