Nb-us77 over I129
Dakota County, Nebraska · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nb-us77 over I129 in Dakota County, Nebraska, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 1977 and reconstructed in 2021, making it 48 years old at the 2025 inventory.
- It carries about 14,555 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 39 of the 74 inventoried bridges in Dakota County rated good (52.7%); 6 (8.1%) 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 → (42.449, -96.4358)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 7 | Good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 246 ft |
| Location | I129/US77 Interchg |
| NBI structure number | S129 00039 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Nebraska department of transportation.
Busiest bridges in Dakota County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US77 over Missouri River | 1981 | 32,065 | Fair |
| I129/US75 over Missouri River | 1976 | 22,815 | Fair |
| I129/US75 over Crystal Lake | 1977 | 14,995 | Good |
| I129/US275 over Crystal Lake | 1977 | 14,995 | Good |
| I129/US75 over BNSF/UPRR/5TH | 1977 | 14,995 | Good |
| I129/US75 over BNSF/UPRR/5TH | 1977 | 14,995 | Good |
All bridges nearby: Dakota County, NE bridge conditions · every bridge in Dakota County · Nebraska bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.