TR 159A Stonewall over E. Fork Mazon River
FairGrundy County, Illinois · .38 MI E Storm RD · Structure no. 032587100000000
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected October 2024
- Type
- Channel Beam
- Concrete
- Length
- 104 ft
- 3 main spans
- Daily traffic
- 50
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 159A Stonewall over E. Fork Mazon River is a concrete channel beam carrying TR 159A Stonewall over E. Fork Mazon River in Grundy County, Illinois. It was built in 1985, so it is 40 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 5 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 50 vehicles a day, roughly 20% of them trucks, projected to reach 60 by 2046. The structure is 104 ft (31.7 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 TR 159A Stonewall over E. Fork Mazon River built?
It was built in 1985, making it 40 years old in 2025.
What condition is TR 159A Stonewall over E. Fork Mazon River 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 October 2024.
How much traffic does TR 159A Stonewall over E. Fork Mazon River carry?
About 50 vehicles per day (2024 count), of which roughly 20% are trucks.
How long is TR 159A Stonewall over E. Fork Mazon River?
The structure is 104 ft (31.7 m) long with a longest span of 34 ft (10.4 m) and a deck 26 ft wide.
Who owns TR 159A Stonewall over E. Fork Mazon River?
It is owned by the Town or Township Highway Agency.