TR 177(RIVER Rd) over Sangamon River Trib
PoorMacon County, Illinois · 3.5 MI SE of Niantic · Structure no. 058330000000000
- Built
- 1988
- 37 years old
- Condition
- Poor
- inspected January 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 53 ft
- 1 main span
- Daily traffic
- 50
- 2020 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 177(RIVER Rd) over Sangamon River Trib is a prestressed concrete box beam or girders - multiple carrying TR 177(RIVER Rd) over Sangamon River Trib in Macon 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 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 50 vehicles a day, roughly 8% of them trucks, projected to reach 51 by 2046. The structure is 53 ft (16.3 m) long and 25 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was TR 177(RIVER Rd) over Sangamon River Trib built?
It was built in 1988, making it 37 years old in 2025.
What condition is TR 177(RIVER Rd) over Sangamon River Trib 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 TR 177(RIVER Rd) over Sangamon River Trib carry?
About 50 vehicles per day (2020 count), of which roughly 8% are trucks.
How long is TR 177(RIVER Rd) over Sangamon River Trib?
The structure is 53 ft (16.3 m) long with a longest span of 50 ft (15.2 m) and a deck 25 ft wide.
Who owns TR 177(RIVER Rd) over Sangamon River Trib?
It is owned by the Town or Township Highway Agency.