US Bridges

TR-185 over Casey Fork

Fair

Jefferson County, Illinois · Jc Lake Dam · Structure no. 041309100000000

Built
1909
116 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
54 ft
2 main spans
Daily traffic
175
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-185 over Casey Fork is a concrete continuous tee beam carrying TR-185 over Casey Fork in Jefferson County, Illinois. It was built in 1909, so it is 116 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 175 vehicles a day, roughly 7% of them trucks, projected to reach 177 by 2046. The structure is 54 ft (16.5 m) long and 17 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR-185
CrossesCasey Fork
LocationJc Lake Dam
RouteCounty Highway 0
CountyJefferson County
StateIllinois
Coordinates38.3692, -88.89787
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating21.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans2
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span26 ft (7.9 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2021)
Projected traffic177 by 2046
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$150,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR-185 over Casey Fork built?

It was built in 1909, making it 116 years old in 2025.

What condition is TR-185 over Casey 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 February 2024.

How much traffic does TR-185 over Casey Fork carry?

About 175 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is TR-185 over Casey Fork?

The structure is 54 ft (16.5 m) long with a longest span of 26 ft (7.9 m) and a deck 17 ft wide.

Who owns TR-185 over Casey Fork?

It is owned by the Town or Township Highway Agency.