US Bridges

Ill 89 over Allforks Creek South

Good

Putnam County, Illinois · 1 MI N of Il 71 · Structure no. 078201000000000

Built
2012
13 years old
Condition
Good
inspected December 2022
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
4,100
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 89 over Allforks Creek South is a concrete continuous culvert carrying Ill 89 over Allforks Creek South in Putnam County, Illinois. It was built in 2012, so it is 13 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 4,100 vehicles a day, roughly 9% of them trucks, projected to reach 4,680 by 2046. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIll 89
CrossesAllforks Creek South
Location1 MI N of Il 71
RouteState Highway 89
CountyPutnam County
StateIllinois
Coordinates41.27263, -89.20222
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating47.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length22 ft (6.6 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2023)
Projected traffic4,680 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 Ill 89 over Allforks Creek South built?

It was built in 2012, making it 13 years old in 2025.

What condition is Ill 89 over Allforks Creek South 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 December 2022.

How much traffic does Ill 89 over Allforks Creek South carry?

About 4,100 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ill 89 over Allforks Creek South?

The structure is 22 ft (6.6 m) long with a longest span of 11 ft (3.4 m).

Who owns Ill 89 over Allforks Creek South?

It is owned by the State Highway Agency.