N21 over South Loup River
GoodCuster County, Nebraska · 5NE Oconto · Structure no. S021 05765
- Built
- 2003
- 22 years old, rebuilt 2021
- Condition
- Good
- inspected November 2024
- Type
- Tee Beam
- Prestressed Concrete Continuous
- Length
- 162 ft
- 3 main spans
- Daily traffic
- 830
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
N21 over South Loup River is a prestressed concrete continuous tee beam carrying N21 over South Loup River in Custer County, Nebraska. It was built in 2003 and reconstructed in 2021, so it is 22 years old, younger 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 830 vehicles a day, roughly 23% of them trucks, projected to reach 1,204 by 2038. The structure is 162 ft (49.4 m) long and 38 ft wide. If it were closed, the detour would be 217.5 mi (350 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 N21 over South Loup River built?
It was built in 2003, making it 22 years old in 2025. It was reconstructed in 2021.
What condition is N21 over South Loup River 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 November 2024.
How much traffic does N21 over South Loup River carry?
About 830 vehicles per day (2018 count), of which roughly 23% are trucks.
How long is N21 over South Loup River?
The structure is 162 ft (49.4 m) long with a longest span of 66 ft (20.2 m) and a deck 38 ft wide.
Who owns N21 over South Loup River?
It is owned by the State Highway Agency.