US Bridges

CH-30 over Skillet Fork

Fair

Marion County, Illinois · 1 MI SW Helm · Structure no. 061303800000000

Built
1915
110 years old
Condition
Fair
inspected April 2024
Type
Truss - Thru
Steel
Length
104 ft
1 main span
Daily traffic
75
2022 count
Owner
County
County Highway Agency

About this bridge

CH-30 over Skillet Fork is a steel truss - thru carrying CH-30 over Skillet Fork in Marion County, Illinois. It was built in 1915, so it is 110 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 75 vehicles a day, roughly 29% of them trucks, projected to reach 76 by 2046. The structure is 104 ft (31.7 m) long and 16 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCH-30
CrossesSkillet Fork
Location1 MI SW Helm
RouteCounty Highway 0
CountyMarion County
StateIllinois
Coordinates38.48973, -88.72695
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating39.7 US tons
Inventory rating27.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length104 ft (31.7 m)
Longest span100 ft (30.5 m)
Deck width16 ft (5 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic76 by 2046
Trucks29%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CH-30 over Skillet Fork built?

It was built in 1915, making it 110 years old in 2025.

What condition is CH-30 over Skillet Fork 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 April 2024.

How much traffic does CH-30 over Skillet Fork carry?

About 75 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is CH-30 over Skillet Fork?

The structure is 104 ft (31.7 m) long with a longest span of 100 ft (30.5 m) and a deck 16 ft wide.

Who owns CH-30 over Skillet Fork?

It is owned by the County Highway Agency.