US Bridges

US 51 Nb(fap 710AL over Spring Creek

Fair

Macon County, Illinois · 0.3MI N Pershing RD · Structure no. 058001500000000

Built
1965
60 years old, rebuilt 1999
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
158 ft
3 main spans
Daily traffic
9,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 51 Nb(fap 710AL over Spring Creek is a steel continuous stringer/multi-beam or girder carrying US 51 Nb(fap 710AL 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 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 9,500 vehicles a day, roughly 3% of them trucks, projected to reach 5,606 by 2046. The structure is 158 ft (48.2 m) long and 37 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesUS 51 Nb(fap 710AL
CrossesSpring Creek
Location0.3MI N Pershing RD
CountyMacon County
StateIllinois
Coordinates39.88249, -88.95506
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.
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating98.2 US tons
Inventory rating66.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length158 ft (48.2 m)
Longest span58 ft (17.8 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,500 (2023)
Projected traffic5,606 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$2.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 51 Nb(fap 710AL 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 Nb(fap 710AL 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 Nb(fap 710AL over Spring Creek carry?

About 9,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is US 51 Nb(fap 710AL over Spring Creek?

The structure is 158 ft (48.2 m) long with a longest span of 58 ft (17.8 m) and a deck 37 ft wide.

Who owns US 51 Nb(fap 710AL over Spring Creek?

It is owned by the State Highway Agency.