TR 503 over Otter Creek
FairLaSalle County, Illinois · N 16th RD E 2110 · Structure no. 050352500000000
- Built
- 1988
- 37 years old
- Condition
- Fair
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 51 ft
- 2 main spans
- Daily traffic
- 1,700
- 2020 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 503 over Otter Creek is a prestressed concrete box beam or girders - multiple carrying TR 503 over Otter Creek in LaSalle County, Illinois. It was built in 1988, so it is 37 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 1,700 vehicles a day, roughly 1% of them trucks, projected to reach 1,717 by 2046. The structure is 51 ft (15.6 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 TR 503 over Otter Creek built?
It was built in 1988, making it 37 years old in 2025.
What condition is TR 503 over Otter 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 June 2024.
How much traffic does TR 503 over Otter Creek carry?
About 1,700 vehicles per day (2020 count), of which roughly 1% are trucks.
How long is TR 503 over Otter Creek?
The structure is 51 ft (15.6 m) long with a longest span of 48 ft (14.6 m) and a deck 24 ft wide.
Who owns TR 503 over Otter Creek?
It is owned by the Town or Township Highway Agency.