US Bridges

Ill 100 over Kerton CR

Fair

Fulton County, Illinois · 2 MI N Anderson Lk P · Structure no. 029002400000000

Built
1935
90 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
57 ft
1 main span
Daily traffic
550
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 100 over Kerton CR is a concrete tee beam carrying Ill 100 over Kerton CR in Fulton County, Illinois. It was built in 1935, so it is 90 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 550 vehicles a day, roughly 20% of them trucks, projected to reach 682 by 2046. The structure is 57 ft (17.4 m) long and 28 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIll 100
CrossesKerton CR
Location2 MI N Anderson Lk P
RouteState Highway 100
CountyFulton County
StateIllinois
Coordinates40.22523, -90.20499
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.1 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic682 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 100 over Kerton CR built?

It was built in 1935, making it 90 years old in 2025.

What condition is Ill 100 over Kerton CR 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 June 2024.

How much traffic does Ill 100 over Kerton CR carry?

About 550 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Ill 100 over Kerton CR?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 28 ft wide.

Who owns Ill 100 over Kerton CR?

It is owned by the State Highway Agency.