620 110TH St over Mid Br Boone River
Hancock County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 620 110TH St over Mid Br Boone River in Hancock County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2008, making it 17 years old at the 2025 inventory.
- It carries about 35 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 55 of the 135 inventoried bridges in Hancock County rated good (40.7%); 27 (20.0%) 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 2023, on a 48-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 → (42.92278, -93.86791)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 83 ft |
| Location | 094263601 |
| NBI structure number | 000000000173031 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2023 |
| Inspection interval (item 91) | 48 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 Hancock County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 18 over E Branch Iowa River | 2002 | 6,500 | Good |
| US 18 over Drainage Ditch | 1958 | 5,200 | Fair |
| US 18 over West Fork Iowa River | 1958 | 5,200 | Fair |
| B-14 over Private Dr | 1972 | 3,502 | Fair |
| US 18 over Boone River | 1959 | 2,980 | Fair |
| US 18 over Branch Boone River | 1959 | 2,980 | Fair |
All bridges nearby: Hancock County, IA bridge conditions · every bridge in Hancock County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.