US Bridges

Ill 29 over Ill River Trib

Fair

Peoria County, Illinois · 2.2 MI S of Sparland · Structure no. 062000900000000

Built
1953
72 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete
Length
32 ft
1 main span
Daily traffic
4,950
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 29 over Ill River Trib is a concrete tee beam carrying Ill 29 over Ill River Trib in Peoria County, Illinois. It was built in 1953, so it is 72 years old, older 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 4,950 vehicles a day, roughly 13% of them trucks, projected to reach 6,666 by 2046. The structure is 32 ft (9.8 m) long and 68 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesIll 29
CrossesIll River Trib
Location2.2 MI S of Sparland
RouteState Highway 29
Coordinates40.98979, -89.44626
Functional classRural Principal Arterial - Other

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating69.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width68 ft (20.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,950 (2023)
Projected traffic6,666 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Ill 29 over Ill River Trib built?

It was built in 1953, making it 72 years old in 2025.

What condition is Ill 29 over Ill River Trib 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 November 2023.

How much traffic does Ill 29 over Ill River Trib carry?

About 4,950 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Ill 29 over Ill River Trib?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 68 ft wide.

Who owns Ill 29 over Ill River Trib?

It is owned by the State Highway Agency.