US Bridges

Il 4 over Polecat Creek

Good

Sangamon County, Illinois · .2 S of Plummer Chtm · Structure no. 084052100000000

Built
2011
14 years old
Condition
Good
inspected November 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
132 ft
3 main spans
Daily traffic
16,500
2023 count
Owner
State
State Highway Agency

About this bridge

Il 4 over Polecat Creek is a steel continuous stringer/multi-beam or girder carrying Il 4 over Polecat Creek in Sangamon County, Illinois. It was built in 2011, so it is 14 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 16,500 vehicles a day, roughly 3% of them trucks, projected to reach 15,049 by 2046. The structure is 132 ft (40.3 m) long and 78 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIl 4
CrossesPolecat Creek
Location.2 S of Plummer Chtm
RouteState Highway 4
CountySangamon County
StateIllinois
Coordinates39.68291, -89.70472
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.4 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length132 ft (40.3 m)
Longest span52 ft (15.9 m)
Deck width78 ft (23.9 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,500 (2023)
Projected traffic15,049 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Il 4 over Polecat Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Il 4 over Polecat 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 November 2021.

How much traffic does Il 4 over Polecat Creek carry?

About 16,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Il 4 over Polecat Creek?

The structure is 132 ft (40.3 m) long with a longest span of 52 ft (15.9 m) and a deck 78 ft wide.

Who owns Il 4 over Polecat Creek?

It is owned by the State Highway Agency.