Lost Bridge(fau 73 over Lake Decatur
PoorMacon County, Illinois · Across SE Lake Decat · Structure no. 058600800000000
- Built
- 1961
- 64 years old, rebuilt 1994
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 452 ft
- 6 main spans
- Daily traffic
- 9,000
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Lost Bridge(fau 73 over Lake Decatur is a steel stringer/multi-beam or girder carrying Lost Bridge(fau 73 over Lake Decatur in Macon County, Illinois. It was built in 1961 and reconstructed in 1994, so it is 64 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 2 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 9,000 vehicles a day, roughly 4% of them trucks, projected to reach 8,939 by 2046. The structure is 452 ft (137.9 m) long and 38 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 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lost Bridge(fau 73 over Lake Decatur built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1994.
What condition is Lost Bridge(fau 73 over Lake Decatur 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 August 2024.
How much traffic does Lost Bridge(fau 73 over Lake Decatur carry?
About 9,000 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Lost Bridge(fau 73 over Lake Decatur?
The structure is 452 ft (137.9 m) long with a longest span of 74 ft (22.5 m) and a deck 38 ft wide.
Who owns Lost Bridge(fau 73 over Lake Decatur?
It is owned by the County Highway Agency.