FAS 644(CH 55) over Overflow of Sangamon
PoorMacon County, Illinois · 3.3 MI S Niantic · Structure no. 058319800000000
- Built
- 1979
- 46 years old
- Condition
- Poor
- inspected January 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 113 ft
- 3 main spans
- Daily traffic
- 550
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
FAS 644(CH 55) over Overflow of Sangamon is a prestressed concrete box beam or girders - multiple carrying FAS 644(CH 55) over Overflow of Sangamon in Macon County, Illinois. It was built in 1979, so it is 46 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 550 vehicles a day, roughly 16% of them trucks, projected to reach 606 by 2046. The structure is 113 ft (34.3 m) long and 28 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 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 | 4 Poor | Advanced section loss, deterioration, 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 FAS 644(CH 55) over Overflow of Sangamon built?
It was built in 1979, making it 46 years old in 2025.
What condition is FAS 644(CH 55) over Overflow of Sangamon 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 FAS 644(CH 55) over Overflow of Sangamon carry?
About 550 vehicles per day (2021 count), of which roughly 16% are trucks.
How long is FAS 644(CH 55) over Overflow of Sangamon?
The structure is 113 ft (34.3 m) long with a longest span of 37 ft (11.3 m) and a deck 28 ft wide.
Who owns FAS 644(CH 55) over Overflow of Sangamon?
It is owned by the County Highway Agency.