US Bridges

TR 392 over Beaver Ditch No 1

Good

Iroquois County, Illinois · 2 MI N Donovan · Structure no. 038332900000000

Built
1976
49 years old
Condition
Good
inspected April 2021
Type
Slab
Concrete
Length
34 ft
1 main span
Daily traffic
100
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 392 over Beaver Ditch No 1 is a concrete slab carrying TR 392 over Beaver Ditch No 1 in Iroquois County, Illinois. It was built in 1976, so it is 49 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 100 vehicles a day, roughly 27% of them trucks, projected to reach 126 by 2046. The structure is 34 ft (10.4 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 392
CrossesBeaver Ditch No 1
Location2 MI N Donovan
RouteCounty Highway 0
Coordinates40.91796, -87.61718
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic126 by 2046
Trucks27%
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 392 over Beaver Ditch No 1 built?

It was built in 1976, making it 49 years old in 2025.

What condition is TR 392 over Beaver Ditch No 1 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 April 2021.

How much traffic does TR 392 over Beaver Ditch No 1 carry?

About 100 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is TR 392 over Beaver Ditch No 1?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 27 ft wide.

Who owns TR 392 over Beaver Ditch No 1?

It is owned by the Town or Township Highway Agency.