US Bridges

Il 29 over Adams Creek

Fair

Bureau County, Illinois · 3.2 MI W of Il 89 · Structure no. 006014300000000

Built
1985
40 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
155 ft
2 main spans
Daily traffic
2,450
2023 count
Owner
State
State Highway Agency

About this bridge

Il 29 over Adams Creek is a prestressed concrete stringer/multi-beam or girder carrying Il 29 over Adams Creek in Bureau County, Illinois. It was built in 1985, so it is 40 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 2,450 vehicles a day, roughly 4% of them trucks, projected to reach 3,384 by 2046. The structure is 155 ft (47.2 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIl 29
CrossesAdams Creek
Location3.2 MI W of Il 89
RouteState Highway 29
CountyBureau County
StateIllinois
Coordinates41.33297, -89.27798
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length155 ft (47.2 m)
Longest span75 ft (22.9 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,450 (2023)
Projected traffic3,384 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 29 over Adams Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Il 29 over Adams Creek 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 2024.

How much traffic does Il 29 over Adams Creek carry?

About 2,450 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Il 29 over Adams Creek?

The structure is 155 ft (47.2 m) long with a longest span of 75 ft (22.9 m) and a deck 35 ft wide.

Who owns Il 29 over Adams Creek?

It is owned by the State Highway Agency.