CO RD NW 400 over Br Blackwater Rvr
GoodJohnson County, Missouri · S 3 T 46 N R 26 W · Structure no. 15401
- Built
- 1900
- 125 years old, rebuilt 1986
- Condition
- Good
- inspected November 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 120 ft
- 3 main spans
- Daily traffic
- 200
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
CO RD NW 400 over Br Blackwater Rvr is a prestressed concrete tee beam carrying CO RD NW 400 over Br Blackwater Rvr in Johnson County, Missouri. It was built in 1900 and reconstructed in 1986, so it is 125 years old, older than the Missouri average of 45.1 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 320 by 2043. The structure is 120 ft (36.6 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was CO RD NW 400 over Br Blackwater Rvr built?
It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1986.
What condition is CO RD NW 400 over Br Blackwater Rvr 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 CO RD NW 400 over Br Blackwater Rvr carry?
About 200 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is CO RD NW 400 over Br Blackwater Rvr?
The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 26 ft wide.
Who owns CO RD NW 400 over Br Blackwater Rvr?
It is owned by the County Highway Agency.