Rockton RD over Rocktn Dam Mill Race
FairWinnebago County, Illinois · W. Edge of Rockton · Structure no. 101308200000000
- Built
- 1990
- 35 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 267 ft
- 4 main spans
- Daily traffic
- 2,200
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Rockton RD over Rocktn Dam Mill Race is a prestressed concrete continuous stringer/multi-beam or girder carrying Rockton RD over Rocktn Dam Mill Race in Winnebago County, Illinois. It was built in 1990, so it is 35 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 2,200 vehicles a day, roughly 5% of them trucks, projected to reach 2,273 by 2046. The structure is 267 ft (81.4 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Rockton RD over Rocktn Dam Mill Race built?
It was built in 1990, making it 35 years old in 2025.
What condition is Rockton RD over Rocktn Dam Mill Race 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 August 2023.
How much traffic does Rockton RD over Rocktn Dam Mill Race carry?
About 2,200 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Rockton RD over Rocktn Dam Mill Race?
The structure is 267 ft (81.4 m) long with a longest span of 65 ft (19.9 m) and a deck 35 ft wide.
Who owns Rockton RD over Rocktn Dam Mill Race?
It is owned by the County Highway Agency.