US Bridges

Old US 36 over Sangamon River

Fair

Sangamon County, Illinois · SW Edge Riverton · Structure no. 084005200000000

Built
1956
69 years old, rebuilt 2006
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
778 ft
6 main spans
Daily traffic
2,500
2022 count
Owner
State
State Highway Agency

About this bridge

Old US 36 over Sangamon River is a steel continuous stringer/multi-beam or girder carrying Old US 36 over Sangamon River in Sangamon County, Illinois. It was built in 1956 and reconstructed in 2006, so it is 69 years old, older 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 5 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 2,500 vehicles a day, roughly 4% of them trucks, projected to reach 6,616 by 2046. The structure is 778 ft (237 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesOld US 36
CrossesSangamon River
LocationSW Edge Riverton
CountySangamon County
StateIllinois
Coordinates39.83833, -89.54444
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.7 US tons
Inventory rating54.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length778 ft (237 m)
Longest span160 ft (48.8 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2022)
Projected traffic6,616 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Old US 36 over Sangamon River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2006.

What condition is Old US 36 over Sangamon River 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 July 2023.

How much traffic does Old US 36 over Sangamon River carry?

About 2,500 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Old US 36 over Sangamon River?

The structure is 778 ft (237 m) long with a longest span of 160 ft (48.8 m) and a deck 36 ft wide.

Who owns Old US 36 over Sangamon River?

It is owned by the State Highway Agency.