US77 over Missouri River
Dakota County, Nebraska · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US77 over Missouri River in Dakota County, Nebraska, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1981 and reconstructed in 1983, making it 44 years old at the 2025 inventory.
- It carries about 32,065 vehicles a day (traffic count year 2018).
- Its listed owner is the state highway agency.
- It is one of 29 of the 74 inventoried bridges in Dakota County rated fair (39.2%); 6 (8.1%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (42.488, -96.4136)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Steel through arch |
| Length | about 1,501 ft |
| Location | Ncl South Sioux City |
| NBI structure number | S077 18870 |
| Condition class | Fair |
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 |
|---|---|---|---|
| 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 |
| I129/US75 over Dakota Ave | 1974 | 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.