US Bridges

US 51 SB (fap 322) over Crooked Creek

Fair

Marion County, Illinois · N of Central City · Structure no. 061007500000000

Built
1982
43 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
310 ft
4 main spans
Daily traffic
4,050
2023 count
Owner
State
State Highway Agency

About this bridge

US 51 SB (fap 322) over Crooked Creek is a steel continuous stringer/multi-beam or girder carrying US 51 SB (fap 322) over Crooked Creek in Marion County, Illinois. It was built in 1982, so it is 43 years old, younger 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 4,050 vehicles a day, roughly 12% of them trucks, projected to reach 2,146 by 2046. The structure is 310 ft (94.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 51 SB (fap 322)
CrossesCrooked Creek
LocationN of Central City
RouteU.S. Route 51
CountyMarion County
StateIllinois
Coordinates38.55658, -89.1268
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length310 ft (94.6 m)
Longest span84 ft (25.5 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,050 (2023)
Projected traffic2,146 by 2046
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 51 SB (fap 322) over Crooked Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is US 51 SB (fap 322) over Crooked 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 US 51 SB (fap 322) over Crooked Creek carry?

About 4,050 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 51 SB (fap 322) over Crooked Creek?

The structure is 310 ft (94.6 m) long with a longest span of 84 ft (25.5 m) and a deck 43 ft wide.

Who owns US 51 SB (fap 322) over Crooked Creek?

It is owned by the State Highway Agency.