US Bridges

Ill 97 over Richland Creek

Fair

Sangamon County, Illinois · 2.5M S Salisbury · Structure no. 084006800000000

Built
1936
89 years old, rebuilt 1986
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
39 ft
1 main span
Daily traffic
3,850
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 97 over Richland Creek is a steel stringer/multi-beam or girder carrying Ill 97 over Richland Creek in Sangamon County, Illinois. It was built in 1936 and reconstructed in 1986, 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 3,850 vehicles a day, roughly 2% of them trucks, projected to reach 4,343 by 2046. The structure is 39 ft (11.9 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesIll 97
CrossesRichland Creek
Location2.5M S Salisbury
RouteState Highway 97
Coordinates39.84887, -89.78722
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating40.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length39 ft (11.9 m)
Longest span36 ft (11 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,850 (2023)
Projected traffic4,343 by 2046
Trucks2%
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 1986.

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 September 2024.

How much traffic does Ill 97 over Richland Creek carry?

About 3,850 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Ill 97 over Richland Creek?

The structure is 39 ft (11.9 m) long with a longest span of 36 ft (11 m) and a deck 34 ft wide.

Who owns Ill 97 over Richland Creek?

It is owned by the State Highway Agency.