US Bridges

Walnut Rd/ TR 308 over Little Silver Creek

Fair

Madison County, Illinois · 3.0 MI SE ST Jacob · Structure no. 060324400000000

Built
1976
49 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
31 ft
2 main spans
Daily traffic
150
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Walnut Rd/ TR 308 over Little Silver Creek is a steel culvert carrying Walnut Rd/ TR 308 over Little Silver Creek in Madison 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 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 150 vehicles a day, roughly 8% of them trucks, projected to reach 161 by 2046. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesWalnut Rd/ TR 308
CrossesLittle Silver Creek
Location3.0 MI SE ST Jacob
RouteCounty Highway 0
CountyMadison County
StateIllinois
Coordinates38.67239, -89.73503
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length31 ft (9.4 m)
Longest span14 ft (4.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2021)
Projected traffic161 by 2046
Trucks8%
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 Walnut Rd/ TR 308 over Little Silver Creek built?

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

What condition is Walnut Rd/ TR 308 over Little Silver 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 October 2024.

How much traffic does Walnut Rd/ TR 308 over Little Silver Creek carry?

About 150 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Walnut Rd/ TR 308 over Little Silver Creek?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.2 m).

Who owns Walnut Rd/ TR 308 over Little Silver Creek?

It is owned by the Town or Township Highway Agency.