US Bridges

TR 15 over Trib Langan Creek

Fair

Iroquois County, Illinois · 1.8MI E CH8 · Structure no. 038480400000000

Built
1929
96 years old
Condition
Fair
inspected September 2023
Type
Other
Concrete
Length
40 ft
1 main span
Daily traffic
25
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 15 over Trib Langan Creek is a concrete other carrying TR 15 over Trib Langan Creek in Iroquois County, Illinois. It was built in 1929, so it is 96 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 25 vehicles a day, projected to reach 25 by 2046. The structure is 40 ft (12.2 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 15
CrossesTrib Langan Creek
Location1.8MI E CH8
RouteCounty Highway 0
CountyIroquois County
StateIllinois
Coordinates40.96971, -88.05932
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating26.1 US tons

Structure

Structure typeOther
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width22 ft (6.6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic25 by 2046
Trucks0%
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 15 over Trib Langan Creek built?

It was built in 1929, making it 96 years old in 2025.

What condition is TR 15 over Trib Langan Creek 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 September 2023.

How much traffic does TR 15 over Trib Langan Creek carry?

About 25 vehicles per day (2022 count).

How long is TR 15 over Trib Langan Creek?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 22 ft wide.

Who owns TR 15 over Trib Langan Creek?

It is owned by the Town or Township Highway Agency.