US Bridges

US 51 NB over Bnsfrr

Good

Marion County, Illinois · 1 MI S of Centralia · Structure no. 061008300000000

Built
1993
32 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
251 ft
3 main spans
Daily traffic
6,900
2023 count
Owner
State
State Highway Agency

About this bridge

US 51 NB over Bnsfrr is a steel continuous stringer/multi-beam or girder carrying US 51 NB over Bnsfrr in Marion County, Illinois. It was built in 1993, so it is 32 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,900 vehicles a day, roughly 11% of them trucks, projected to reach 3,030 by 2046. The structure is 251 ft (76.5 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 51 NB
CrossesBnsfrr
Location1 MI S of Centralia
RouteU.S. Route 51
Coordinates38.49686, -89.13092
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length251 ft (76.5 m)
Longest span114 ft (34.7 m)
Deck width42 ft (12.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,900 (2023)
Projected traffic3,030 by 2046
Trucks11%
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 NB over Bnsfrr built?

It was built in 1993, making it 32 years old in 2025.

What condition is US 51 NB over Bnsfrr in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does US 51 NB over Bnsfrr carry?

About 6,900 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 51 NB over Bnsfrr?

The structure is 251 ft (76.5 m) long with a longest span of 114 ft (34.7 m) and a deck 42 ft wide.

Who owns US 51 NB over Bnsfrr?

It is owned by the State Highway Agency.