CO RD 121 over Blackwater Rvr
GoodJohnson County, Missouri · S 3 T 46 N R 26 W · Structure no. 19917
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 235 ft
- 3 main spans
- Daily traffic
- 75
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
CO RD 121 over Blackwater Rvr is a prestressed concrete stringer/multi-beam or girder carrying CO RD 121 over Blackwater Rvr in Johnson County, Missouri. It was built in 1996, so it is 29 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 75 vehicles a day, roughly 3% of them trucks, projected to reach 120 by 2043. The structure is 235 ft (71.6 m) long and 26 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 | 8 Very Good | No problems noted. |
| 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 121 over Blackwater Rvr built?
It was built in 1996, making it 29 years old in 2025.
What condition is CO RD 121 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 121 over Blackwater Rvr carry?
About 75 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is CO RD 121 over Blackwater Rvr?
The structure is 235 ft (71.6 m) long with a longest span of 81 ft (24.7 m) and a deck 26 ft wide.
Who owns CO RD 121 over Blackwater Rvr?
It is owned by the County Highway Agency.