G53 270TH St over Branch of Nine Mile Run
Adair County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- G53 270TH St over Branch of Nine Mile Run in Adair County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 9 (excellent condition) on the 0-9 scale.
- It was built in 2016, making it 9 years old at the 2025 inventory.
- It carries about 26 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 145 of the 303 inventoried bridges in Adair County rated good (47.9%); 37 (12.2%) 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 April 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (41.25838, -94.42332)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 9 | 9 | Excellent condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 24 ft |
| Location | 1.5 mi E of IA 25 on G53 |
| NBI structure number | 000000000366240 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| 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 Adair County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 over Drainage Ditch | 1959 | 27,600 | Fair |
| I-80 over Drainage Ditch | 1959 | 27,600 | Fair |
| I-80 over North River | 1958 | 25,900 | Fair |
| I-80 over Plunger Creek | 1959 | 25,900 | Fair |
| I-80 over Middle River | 1958 | 24,800 | Fair |
| I-80 over Drainage Ditch | 1958 | 24,800 | Fair |
All bridges nearby: Adair County, IA bridge conditions · every bridge in Adair County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.