Latham-Ralston RD over Rock River
PoorWinnebago County, Illinois · 1 Mi. E. Ill 2 · Structure no. 101301700000000
- Built
- 1969
- 56 years old
- Condition
- Poor
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 601 ft
- 5 main spans
- Daily traffic
- 8,200
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Latham-Ralston RD over Rock River is a steel continuous stringer/multi-beam or girder carrying Latham-Ralston RD over Rock River in Winnebago County, Illinois. It was built in 1969, so it is 56 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 8,200 vehicles a day, roughly 11% of them trucks, projected to reach 8,787 by 2046. The structure is 601 ft (183.2 m) long and 38 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Latham-Ralston RD over Rock River built?
It was built in 1969, making it 56 years old in 2025.
What condition is Latham-Ralston RD over Rock River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2024.
How much traffic does Latham-Ralston RD over Rock River carry?
About 8,200 vehicles per day (2022 count), of which roughly 11% are trucks.
How long is Latham-Ralston RD over Rock River?
The structure is 601 ft (183.2 m) long with a longest span of 119 ft (36.3 m) and a deck 38 ft wide.
Who owns Latham-Ralston RD over Rock River?
It is owned by the County Highway Agency.