US Bridges

Il 29 NB over Clear Creek

Fair

Christian County, Illinois · 0.9 MI NW Sharpsburg · Structure no. 011050300000000

Built
2005
20 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
122 ft
1 main span
Daily traffic
8,550
2023 count
Owner
State
State Highway Agency

About this bridge

Il 29 NB over Clear Creek is a steel stringer/multi-beam or girder carrying Il 29 NB over Clear Creek in Christian County, Illinois. It was built in 2005, so it is 20 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 6 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 8,550 vehicles a day, roughly 11% of them trucks, projected to reach 4,242 by 2046. The structure is 122 ft (37.1 m) long and 43 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesIl 29 NB
CrossesClear Creek
Location0.9 MI NW Sharpsburg
RouteState Highway 29
CountyChristian County
StateIllinois
Coordinates39.62236, -89.35913
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating61.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length122 ft (37.1 m)
Longest span119 ft (36.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,550 (2023)
Projected traffic4,242 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 29 NB over Clear Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Il 29 NB over Clear 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 October 2023.

How much traffic does Il 29 NB over Clear Creek carry?

About 8,550 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Il 29 NB over Clear Creek?

The structure is 122 ft (37.1 m) long with a longest span of 119 ft (36.3 m) and a deck 43 ft wide.

Who owns Il 29 NB over Clear Creek?

It is owned by the State Highway Agency.