N56 over Plum Creek
GoodBoone County, Nebraska · 8E Cedar Rapids · Structure no. S056 02857
- Built
- 1961
- 64 years old
- Condition
- Good
- inspected June 2023
- Type
- Slab
- Concrete Continuous
- Length
- 114 ft
- 3 main spans
- Daily traffic
- 680
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
N56 over Plum Creek is a concrete continuous slab carrying N56 over Plum Creek in Boone County, Nebraska. It was built in 1961, so it is 64 years old, older than the Nebraska average of 47.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 680 vehicles a day, roughly 13% of them trucks, projected to reach 850 by 2038. The structure is 114 ft (34.7 m) long and 32 ft wide. If it were closed, the detour would be 31.1 mi (50 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N56 over Plum Creek built?
It was built in 1961, making it 64 years old in 2025.
What condition is N56 over Plum Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.
How much traffic does N56 over Plum Creek carry?
About 680 vehicles per day (2018 count), of which roughly 13% are trucks.
How long is N56 over Plum Creek?
The structure is 114 ft (34.7 m) long with a longest span of 46 ft (14 m) and a deck 32 ft wide.
Who owns N56 over Plum Creek?
It is owned by the State Highway Agency.