US Bridges

Il 97 over Prairie Creek

Fair

Sangamon County, Illinois · 0.45 MI E Il 125 · Structure no. 084004600000000

Built
1941
84 years old, rebuilt 2008
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
8,500
2023 count
Owner
State
State Highway Agency

About this bridge

Il 97 over Prairie Creek is a prestressed concrete box beam or girders - multiple carrying Il 97 over Prairie Creek in Sangamon County, Illinois. It was built in 1941 and reconstructed in 2008, so it is 84 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 8,500 vehicles a day, roughly 4% of them trucks, projected to reach 9,949 by 2046. The structure is 60 ft (18.4 m) long and 33 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesIl 97
CrossesPrairie Creek
Location0.45 MI E Il 125
RouteState Highway 97
CountySangamon County
StateIllinois
Coordinates39.83565, -89.78172
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.
Superstructure7 GoodSome minor problems.
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 inspectionJune 2023
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating47.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length60 ft (18.4 m)
Longest span57 ft (17.4 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2023)
Projected traffic9,949 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$393,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 97 over Prairie Creek built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 2008.

What condition is Il 97 over Prairie 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 June 2023.

How much traffic does Il 97 over Prairie Creek carry?

About 8,500 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Il 97 over Prairie Creek?

The structure is 60 ft (18.4 m) long with a longest span of 57 ft (17.4 m) and a deck 33 ft wide.

Who owns Il 97 over Prairie Creek?

It is owned by the State Highway Agency.