US Bridges

Conn Rd/ TR 280 over Trib to Silver Ck

Good

Madison County, Illinois · 1.0 MI SW Alhambra · Structure no. 060324700000000

Built
1979
46 years old
Condition
Good
inspected February 2025
Type
Culvert
Steel
Length
35 ft
2 main spans
Daily traffic
75
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Conn Rd/ TR 280 over Trib to Silver Ck is a steel culvert carrying Conn Rd/ TR 280 over Trib to Silver Ck in Madison County, Illinois. It was built in 1979, so it is 46 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 75 vehicles a day, roughly 17% of them trucks, projected to reach 80 by 2046. The structure is 35 ft (10.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesConn Rd/ TR 280
CrossesTrib to Silver Ck
Location1.0 MI SW Alhambra
RouteCounty Highway 0
Coordinates38.87442, -89.76366
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.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating31.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length35 ft (10.6 m)
Longest span16 ft (4.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2021)
Projected traffic80 by 2046
Trucks17%
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 Conn Rd/ TR 280 over Trib to Silver Ck built?

It was built in 1979, making it 46 years old in 2025.

What condition is Conn Rd/ TR 280 over Trib to Silver Ck 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 February 2025.

How much traffic does Conn Rd/ TR 280 over Trib to Silver Ck carry?

About 75 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is Conn Rd/ TR 280 over Trib to Silver Ck?

The structure is 35 ft (10.6 m) long with a longest span of 16 ft (4.8 m).

Who owns Conn Rd/ TR 280 over Trib to Silver Ck?

It is owned by the Town or Township Highway Agency.