US Bridges

TR 346 over Sand Creek Trib

Good

Shelby County, Illinois · 2.9 MI NW Windsor · Structure no. 087342700000000

Built
1987
38 years old
Condition
Good
inspected March 2022
Type
Culvert
Concrete
Length
56 ft
3 main spans
Daily traffic
50
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 346 over Sand Creek Trib is a concrete culvert carrying TR 346 over Sand Creek Trib in Shelby County, Illinois. It was built in 1987, so it is 38 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 51 by 2046. The structure is 56 ft (17.1 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTR 346
CrossesSand Creek Trib
Location2.9 MI NW Windsor
RouteCounty Highway 0
Coordinates39.45508, -88.64522
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span13 ft (4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic51 by 2046
Trucks10%
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 346 over Sand Creek Trib built?

It was built in 1987, making it 38 years old in 2025.

What condition is TR 346 over Sand Creek Trib 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 March 2022.

How much traffic does TR 346 over Sand Creek Trib carry?

About 50 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is TR 346 over Sand Creek Trib?

The structure is 56 ft (17.1 m) long with a longest span of 13 ft (4 m) and a deck 24 ft wide.

Who owns TR 346 over Sand Creek Trib?

It is owned by the Town or Township Highway Agency.