US Bridges

US 51 SB Center ST over Norfolk Southern Railway

Fair

McLean County, Illinois · US 51 SB in Blmngtn · Structure no. 057630100000000

Built
1971
54 years old, rebuilt 2004
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
648 ft
8 main spans
Daily traffic
8,800
2023 count
Owner
State
State Highway Agency

About this bridge

US 51 SB Center ST over Norfolk Southern Railway is a steel continuous stringer/multi-beam or girder carrying US 51 SB Center ST over Norfolk Southern Railway in McLean County, Illinois. It was built in 1971 and reconstructed in 2004, so it is 54 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 8,800 vehicles a day, roughly 9% of them trucks, projected to reach 9,292 by 2046. The structure is 648 ft (197.4 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 51 SB Center ST
CrossesNorfolk Southern Railway
LocationUS 51 SB in Blmngtn
RouteU.S. Route 51
Coordinates40.47544, -88.99444
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length648 ft (197.4 m)
Longest span95 ft (29 m)
Deck width42 ft (12.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,800 (2023)
Projected traffic9,292 by 2046
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 51 SB Center ST over Norfolk Southern Railway built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2004.

What condition is US 51 SB Center ST over Norfolk Southern Railway 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 Center ST over Norfolk Southern Railway carry?

About 8,800 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 51 SB Center ST over Norfolk Southern Railway?

The structure is 648 ft (197.4 m) long with a longest span of 95 ft (29 m) and a deck 42 ft wide.

Who owns US 51 SB Center ST over Norfolk Southern Railway?

It is owned by the State Highway Agency.