US Bridges

Il 89 over Unnamed Stream

Fair

Putnam County, Illinois · 1.65 Mile S of US 6 · Structure no. 078200400000000

Built
2001
24 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete Continuous
Length
36 ft
2 main spans
Daily traffic
5,450
2023 count
Owner
State
State Highway Agency

About this bridge

Il 89 over Unnamed Stream is a concrete continuous culvert carrying Il 89 over Unnamed Stream in Putnam County, Illinois. It was built in 2001, so it is 24 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 5 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 5,450 vehicles a day, roughly 6% of them trucks, projected to reach 6,032 by 2046. The structure is 36 ft (10.9 m) long and 87 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesIl 89
CrossesUnnamed Stream
Location1.65 Mile S of US 6
RouteState Highway 89
CountyPutnam County
StateIllinois
Coordinates41.30337, -89.19989
Functional classRural Minor 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length36 ft (10.9 m)
Longest span16 ft (4.9 m)
Deck width87 ft (26.6 m)
Roadway width45 ft (13.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,450 (2023)
Projected traffic6,032 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Il 89 over Unnamed Stream built?

It was built in 2001, making it 24 years old in 2025.

What condition is Il 89 over Unnamed Stream 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 2023.

How much traffic does Il 89 over Unnamed Stream carry?

About 5,450 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Il 89 over Unnamed Stream?

The structure is 36 ft (10.9 m) long with a longest span of 16 ft (4.9 m) and a deck 87 ft wide.

Who owns Il 89 over Unnamed Stream?

It is owned by the State Highway Agency.