US Bridges

Il 104 over Illinois River

Fair

Pike County, Illinois · Meredosia · Structure no. 069052500000000

Built
2018
7 years old
Condition
Fair
inspected July 2024
Type
Arch - Thru
Steel Continuous
Length
2,128 ft
1 main span
Daily traffic
2,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 104 over Illinois River is a steel continuous arch - thru carrying Il 104 over Illinois River in Pike County, Illinois. It was built in 2018, so it is 7 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 2,800 vehicles a day, roughly 26% of them trucks, projected to reach 3,081 by 2046. The structure is 2,128 ft (648.5 m) long and 47 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesIl 104
CrossesIllinois River
LocationMeredosia
RouteState Highway 104
CountyPike County
StateIllinois
Coordinates39.83144, -90.56985
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeArch - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+9 approach)
Design loadHS 25 or greater
Structure length2,128 ft (648.5 m)
Longest span590 ft (179.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2023)
Projected traffic3,081 by 2046
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed36 mi (58 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Il 104 over Illinois River built?

It was built in 2018, making it 7 years old in 2025.

What condition is Il 104 over Illinois River 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 July 2024.

How much traffic does Il 104 over Illinois River carry?

About 2,800 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is Il 104 over Illinois River?

The structure is 2,128 ft (648.5 m) long with a longest span of 590 ft (179.8 m) and a deck 47 ft wide.

Who owns Il 104 over Illinois River?

It is owned by the State Highway Agency.