US Bridges

Old US 51 (fas 179 over Prairie Creek

Fair

Marion County, Illinois · .2 MI S Sandoval · Structure no. 061000600000000

Built
1954
71 years old, rebuilt 1998
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
90 ft
4 main spans
Daily traffic
1,050
2022 count
Owner
State
State Highway Agency

About this bridge

Old US 51 (fas 179 over Prairie Creek is a concrete continuous slab carrying Old US 51 (fas 179 over Prairie Creek in Marion County, Illinois. It was built in 1954 and reconstructed in 1998, so it is 71 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 1,050 vehicles a day, roughly 7% of them trucks, projected to reach 1,162 by 2046. The structure is 90 ft (27.4 m) long and 36 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesOld US 51 (fas 179
CrossesPrairie Creek
Location.2 MI S Sandoval
RouteCounty Highway 0
CountyMarion County
StateIllinois
Coordinates38.60438, -89.1148
Functional classRural Major Collector

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.
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 inspectionJanuary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span25 ft (7.6 m)
Deck width36 ft (11.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2022)
Projected traffic1,162 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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$380,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Old US 51 (fas 179 over Prairie Creek built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1998.

What condition is Old US 51 (fas 179 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 January 2025.

How much traffic does Old US 51 (fas 179 over Prairie Creek carry?

About 1,050 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Old US 51 (fas 179 over Prairie Creek?

The structure is 90 ft (27.4 m) long with a longest span of 25 ft (7.6 m) and a deck 36 ft wide.

Who owns Old US 51 (fas 179 over Prairie Creek?

It is owned by the State Highway Agency.