US Bridges

Ill 97 over Richland Creek

Fair

Sangamon County, Illinois · .5M S Salisbury · Structure no. 084006700000000

Built
1936
89 years old, rebuilt 1989
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
109 ft
3 main spans
Daily traffic
4,200
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 97 over Richland Creek is a steel continuous stringer/multi-beam or girder carrying Ill 97 over Richland Creek in Sangamon County, Illinois. It was built in 1936 and reconstructed in 1989, so it is 89 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 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 4,200 vehicles a day, roughly 5% of them trucks, projected to reach 4,141 by 2046. The structure is 109 ft (33.3 m) long and 35 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesIll 97
CrossesRichland Creek
Location.5M S Salisbury
RouteState Highway 97
Coordinates39.88328, -89.78954
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating44.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length109 ft (33.3 m)
Longest span42 ft (12.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2023)
Projected traffic4,141 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Ill 97 over Richland Creek built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1989.

What condition is Ill 97 over Richland 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 February 2024.

How much traffic does Ill 97 over Richland Creek carry?

About 4,200 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Ill 97 over Richland Creek?

The structure is 109 ft (33.3 m) long with a longest span of 42 ft (12.8 m) and a deck 35 ft wide.

Who owns Ill 97 over Richland Creek?

It is owned by the State Highway Agency.