US Bridges

County HWY 46 over Prairie Creek

Good

Sangamon County, Illinois · 2MI SE Salisbury · Structure no. 084344200000000

Built
1993
32 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
153 ft
3 main spans
Daily traffic
300
2022 count
Owner
County
County Highway Agency

About this bridge

County HWY 46 over Prairie Creek is a prestressed concrete box beam or girders - multiple carrying County HWY 46 over Prairie Creek in Sangamon 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 300 vehicles a day, roughly 4% of them trucks, projected to reach 328 by 2046. The structure is 153 ft (46.5 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCounty HWY 46
CrossesPrairie Creek
Location2MI SE Salisbury
RouteCounty Highway 0
CountySangamon County
StateIllinois
Coordinates39.85829, -89.77032
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length153 ft (46.5 m)
Longest span57 ft (17.4 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2022)
Projected traffic328 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County HWY 46 over Prairie Creek built?

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

What condition is County HWY 46 over Prairie Creek 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 March 2023.

How much traffic does County HWY 46 over Prairie Creek carry?

About 300 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is County HWY 46 over Prairie Creek?

The structure is 153 ft (46.5 m) long with a longest span of 57 ft (17.4 m) and a deck 30 ft wide.

Who owns County HWY 46 over Prairie Creek?

It is owned by the County Highway Agency.