US Bridges

TR 317 over Salt Fork Trib

Fair

Vermilion County, Illinois · 3.5 MI W of Catlin · Structure no. 092347200000000

Built
1999
26 years old
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
275
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 317 over Salt Fork Trib is a prestressed concrete box beam or girders - multiple carrying TR 317 over Salt Fork Trib in Vermilion County, Illinois. It was built in 1999, so it is 26 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 275 vehicles a day, roughly 7% of them trucks, projected to reach 126 by 2046. The structure is 55 ft (16.7 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTR 317
CrossesSalt Fork Trib
Location3.5 MI W of Catlin
RouteCounty Highway 0
Coordinates40.08287, -87.76614
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length55 ft (16.7 m)
Longest span52 ft (15.8 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2023)
Projected traffic126 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 317 over Salt Fork Trib built?

It was built in 1999, making it 26 years old in 2025.

What condition is TR 317 over Salt Fork Trib 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 317 over Salt Fork Trib carry?

About 275 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is TR 317 over Salt Fork Trib?

The structure is 55 ft (16.7 m) long with a longest span of 52 ft (15.8 m) and a deck 27 ft wide.

Who owns TR 317 over Salt Fork Trib?

It is owned by the Town or Township Highway Agency.