US Bridges

US 51 SB (fap 710) over Spring Creek

Fair

Macon County, Illinois · 0.3MI N Pershing RD · Structure no. 058000400000000

Built
1965
60 years old, rebuilt 1999
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
182 ft
3 main spans
Daily traffic
10,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 51 SB (fap 710) over Spring Creek is a steel continuous stringer/multi-beam or girder carrying US 51 SB (fap 710) over Spring Creek in Macon County, Illinois. It was built in 1965 and reconstructed in 1999, so it is 60 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 10,000 vehicles a day, roughly 3% of them trucks, projected to reach 10,302 by 2046. The structure is 182 ft (55.6 m) long and 37 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

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CarriesUS 51 SB (fap 710)
CrossesSpring Creek
Location0.3MI N Pershing RD
CountyMacon County
StateIllinois
Coordinates39.88196, -88.95541
Functional classUrban Other Principal 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating61.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length182 ft (55.6 m)
Longest span67 ft (20.5 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2023)
Projected traffic10,302 by 2046
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemYes

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$2.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 51 SB (fap 710) over Spring Creek built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1999.

What condition is US 51 SB (fap 710) over Spring 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 May 2023.

How much traffic does US 51 SB (fap 710) over Spring Creek carry?

About 10,000 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is US 51 SB (fap 710) over Spring Creek?

The structure is 182 ft (55.6 m) long with a longest span of 67 ft (20.5 m) and a deck 37 ft wide.

Who owns US 51 SB (fap 710) over Spring Creek?

It is owned by the State Highway Agency.