Alpine RD over Forest Hills RD
FairWinnebago County, Illinois · 0.2 MI S Windsor RD · Structure no. 101306800000000
- Built
- 1972
- 53 years old, rebuilt 2021
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 251 ft
- 4 main spans
- Daily traffic
- 16,700
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Alpine RD over Forest Hills RD is a steel continuous stringer/multi-beam or girder carrying Alpine RD over Forest Hills RD in Winnebago County, Illinois. It was built in 1972 and reconstructed in 2021, so it is 53 years old, older 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 16,700 vehicles a day, roughly 4% of them trucks, projected to reach 17,473 by 2046. The structure is 251 ft (76.6 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alpine RD over Forest Hills RD built?
It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2021.
What condition is Alpine RD over Forest Hills RD 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 Alpine RD over Forest Hills RD carry?
About 16,700 vehicles per day (2022 count), of which roughly 4% are trucks.
How long is Alpine RD over Forest Hills RD?
The structure is 251 ft (76.6 m) long with a longest span of 71 ft (21.5 m) and a deck 69 ft wide.
Who owns Alpine RD over Forest Hills RD?
It is owned by the County Highway Agency.