US Bridges

Ill 100 (FAP-304) over Trib to Otter Creek

FairPosted for load

Jersey County, Illinois · 1.7 M S JCT Ill 16 · Structure no. 042001100000000

Built
1925
100 years old, rebuilt 1938
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
950
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 100 (FAP-304) over Trib to Otter Creek is a concrete slab carrying Ill 100 (FAP-304) over Trib to Otter Creek in Jersey County, Illinois. It was built in 1925 and reconstructed in 1938, so it is 100 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. Its operating status is: posted for load restriction.

It carries about 950 vehicles a day, roughly 13% of them trucks, projected to reach 960 by 2046. The structure is 26 ft (8 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIll 100 (FAP-304)
CrossesTrib to Otter Creek
Location1.7 M S JCT Ill 16
RouteState Highway 100
CountyJersey County
StateIllinois
Coordinates39.08365, -90.55549
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length26 ft (8 m)
Longest span25 ft (7.7 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2023)
Projected traffic960 by 2046
Trucks13%
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 Ill 100 (FAP-304) over Trib to Otter Creek built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1938.

What condition is Ill 100 (FAP-304) over Trib to Otter 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 November 2024.

How much traffic does Ill 100 (FAP-304) over Trib to Otter Creek carry?

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

How long is Ill 100 (FAP-304) over Trib to Otter Creek?

The structure is 26 ft (8 m) long with a longest span of 25 ft (7.7 m) and a deck 33 ft wide.

Who owns Ill 100 (FAP-304) over Trib to Otter Creek?

It is owned by the State Highway Agency.