County Rd X-64 over Overflow
Jones County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Rd X-64 over Overflow in Jones County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1950, making it 75 years old at the 2025 inventory.
- It carries about 393 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 11 of the 230 inventoried bridges in Jones County rated poor (4.8%); 11 (4.8%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- It was rated fair in the 2024 inventory and is now poor (substructure 5 to 4).
- Its most recent inspection on record is dated February 2024, 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 → (41.97568, -90.95884)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 4 | Poor condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 81 ft |
| Location | 083012810 |
| NBI structure number | 000000000206110 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | February 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 Jones County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 151 over Drainage Ditch | 1964 | 14,100 | Fair |
| US 151 over Unnamed Creek | 2001 | 12,200 | Good |
| 3RD Street over Fawn Creek | 1965 | 7,954 | Fair |
| US 151 SB over Wapsipinicon River | 1964 | 7,350 | Fair |
| US 151 NB over Wapsipinicon River | 2002 | 7,200 | Fair |
| US 151 SB over Kitty Creek | 1960 | 6,250 | Fair |
All bridges nearby: Jones County, IA bridge conditions · every bridge in Jones County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.