US Bridges

TR 178 over Stream

Good

Iroquois County, Illinois · 1.25 MI N Lerable · Structure no. 038364000000000

Built
1967
58 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
21 ft
1 main span
Daily traffic
175
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 178 over Stream is a concrete slab carrying TR 178 over Stream in Iroquois County, Illinois. It was built in 1967, so it is 58 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 175 vehicles a day, roughly 29% of them trucks, projected to reach 480 by 2046. The structure is 21 ft (6.4 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 178
CrossesStream
Location1.25 MI N Lerable
RouteCounty Highway 0
Coordinates40.92132, -87.8473
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating33.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length21 ft (6.4 m)
Longest span20 ft (6.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2022)
Projected traffic480 by 2046
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 178 over Stream built?

It was built in 1967, making it 58 years old in 2025.

What condition is TR 178 over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does TR 178 over Stream carry?

About 175 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is TR 178 over Stream?

The structure is 21 ft (6.4 m) long with a longest span of 20 ft (6.1 m) and a deck 26 ft wide.

Who owns TR 178 over Stream?

It is owned by the Town or Township Highway Agency.