N56 over Plum Creek
Boone County, Nebraska · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N56 over Plum Creek in Boone County, Nebraska, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 1961, making it 64 years old at the 2025 inventory.
- It carries about 680 vehicles a day (traffic count year 2018).
- Its listed owner is the state highway agency.
- It is one of 157 of the 237 inventoried bridges in Boone County rated good (66.2%); 7 (3.0%) are rated poor.
- 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 → (41.5678, -98.0136)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 113 ft |
| Location | 8E Cedar Rapids |
| NBI structure number | S056 02857 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Nebraska department of transportation.
Busiest bridges in Boone County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| N14 over Beaver Creek | 1993 | 2,905 | Good |
| N14 over Stream | 1937 | 2,905 | Good |
| N14 over Stream | 1989 | 2,905 | Good |
| N14 over Stream | 1943 | 2,280 | Good |
| N39 over Beaver Creek | 1981 | 2,265 | Good |
| N39 over Stream | 1981 | 2,265 | Fair |
All bridges nearby: Boone County, NE bridge conditions · every bridge in Boone County · Nebraska bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.