Marengo RD (tr 77) over Mud Creek
FairBoone County, Illinois · 1.5 MI N Gardn Prari · Structure no. 004308600000000
- Built
- 1994
- 31 years old
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 52 ft
- 1 main span
- Daily traffic
- 2,000
- 2023 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Marengo RD (tr 77) over Mud Creek is a prestressed concrete stringer/multi-beam or girder carrying Marengo RD (tr 77) over Mud Creek in Boone County, Illinois. It was built in 1994, so it is 31 years old, younger than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 2,000 vehicles a day, roughly 16% of them trucks, projected to reach 2,184 by 2046. The structure is 52 ft (16 m) long and 39 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Marengo RD (tr 77) over Mud Creek built?
It was built in 1994, making it 31 years old in 2025.
What condition is Marengo RD (tr 77) over Mud Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.
How much traffic does Marengo RD (tr 77) over Mud Creek carry?
About 2,000 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is Marengo RD (tr 77) over Mud Creek?
The structure is 52 ft (16 m) long with a longest span of 50 ft (15.2 m) and a deck 39 ft wide.
Who owns Marengo RD (tr 77) over Mud Creek?
It is owned by the Town or Township Highway Agency.