US Bridges

TR 74 over Knights Branch

Fair

Vermilion County, Illinois · 3.5 MI SW Potomac · Structure no. 092329700000000

Built
1978
47 years old
Condition
Fair
inspected February 2025
Type
Channel Beam
Concrete
Length
76 ft
2 main spans
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 74 over Knights Branch is a concrete channel beam carrying TR 74 over Knights Branch in Vermilion County, Illinois. It was built in 1978, so it is 47 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 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 50 vehicles a day, roughly 4% of them trucks, projected to reach 51 by 2046. The structure is 76 ft (23.2 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 74
CrossesKnights Branch
Location3.5 MI SW Potomac
RouteCounty Highway 0
CountyVermilion County
StateIllinois
Coordinates40.25816, -87.82379
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.5 US tons
Inventory rating35.4 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span38 ft (11.6 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic51 by 2046
Trucks4%
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 74 over Knights Branch built?

It was built in 1978, making it 47 years old in 2025.

What condition is TR 74 over Knights Branch 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 2025.

How much traffic does TR 74 over Knights Branch carry?

About 50 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is TR 74 over Knights Branch?

The structure is 76 ft (23.2 m) long with a longest span of 38 ft (11.6 m) and a deck 27 ft wide.

Who owns TR 74 over Knights Branch?

It is owned by the Town or Township Highway Agency.