CO RD NW 400 over Blackwater Rvr
GoodJohnson County, Missouri · S 35 T 47 N R 26 W · Structure no. 30154
- Built
- 2002
- 23 years old
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 42 ft
- 1 main span
- Daily traffic
- 60
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
CO RD NW 400 over Blackwater Rvr is a steel stringer/multi-beam or girder carrying CO RD NW 400 over Blackwater Rvr in Johnson County, Missouri. It was built in 2002, so it is 23 years old, younger 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 60 vehicles a day, roughly 10% of them trucks, projected to reach 96 by 2043. The structure is 42 ft (12.8 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| 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 Blackwater Rvr built?
It was built in 2002, making it 23 years old in 2025.
What condition is CO RD NW 400 over 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 Blackwater Rvr carry?
About 60 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is CO RD NW 400 over Blackwater Rvr?
The structure is 42 ft (12.8 m) long with a longest span of 39 ft (11.9 m) and a deck 23 ft wide.
Who owns CO RD NW 400 over Blackwater Rvr?
It is owned by the County Highway Agency.