US Bridges

Carpenter Rd/ TR 1 over Trib to Cahokia Ck

Fair

Madison County, Illinois · 2.0 MI SW Carpenter · Structure no. 060325000000000

Built
1981
44 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
106 ft
3 main spans
Daily traffic
350
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Carpenter Rd/ TR 1 over Trib to Cahokia Ck is a prestressed concrete box beam or girders - multiple carrying Carpenter Rd/ TR 1 over Trib to Cahokia Ck in Madison County, Illinois. It was built in 1981, so it is 44 years old, younger 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 350 vehicles a day, roughly 6% of them trucks, projected to reach 375 by 2046. The structure is 106 ft (32.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCarpenter Rd/ TR 1
CrossesTrib to Cahokia Ck
Location2.0 MI SW Carpenter
RouteCounty Highway 0
CountyMadison County
StateIllinois
Coordinates38.87109, -89.92492
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating75 US tons
Inventory rating44.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span35 ft (10.7 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2021)
Projected traffic375 by 2046
Trucks6%
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 Carpenter Rd/ TR 1 over Trib to Cahokia Ck built?

It was built in 1981, making it 44 years old in 2025.

What condition is Carpenter Rd/ TR 1 over Trib to Cahokia Ck 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 2023.

How much traffic does Carpenter Rd/ TR 1 over Trib to Cahokia Ck carry?

About 350 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Carpenter Rd/ TR 1 over Trib to Cahokia Ck?

The structure is 106 ft (32.3 m) long with a longest span of 35 ft (10.7 m) and a deck 30 ft wide.

Who owns Carpenter Rd/ TR 1 over Trib to Cahokia Ck?

It is owned by the Town or Township Highway Agency.