US Bridges

TR 328 over Macoupin Creek

Fair

Macoupin County, Illinois · 1 MI S Carlinville · Structure no. 059336600000000

Built
1977
48 years old
Condition
Fair
inspected February 2023
Type
Channel Beam
Concrete
Length
114 ft
3 main spans
Daily traffic
375
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 328 over Macoupin Creek is a concrete channel beam carrying TR 328 over Macoupin Creek in Macoupin County, Illinois. It was built in 1977, so it is 48 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 375 vehicles a day, roughly 13% of them trucks, projected to reach 379 by 2046. The structure is 114 ft (34.7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTR 328
CrossesMacoupin Creek
Location1 MI S Carlinville
RouteCounty Highway 0
CountyMacoupin County
StateIllinois
Coordinates39.25058, -89.87744
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating57.1 US tons
Inventory rating34.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans3
Design loadHS 20
Structure length114 ft (34.7 m)
Longest span38 ft (11.6 m)
Deck width30 ft (9.2 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2021)
Projected traffic379 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 328 over Macoupin Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is TR 328 over Macoupin 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 February 2023.

How much traffic does TR 328 over Macoupin Creek carry?

About 375 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is TR 328 over Macoupin Creek?

The structure is 114 ft (34.7 m) long with a longest span of 38 ft (11.6 m) and a deck 30 ft wide.

Who owns TR 328 over Macoupin Creek?

It is owned by the Town or Township Highway Agency.