US Bridges

FAP 328 (us 45) over Seminary Creek

Fair

Clay County, Illinois · 3.75 MI S JCT US 50 · Structure no. 013004300000000

Built
2009
16 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
2,250
2023 count
Owner
State
State Highway Agency

About this bridge

FAP 328 (us 45) over Seminary Creek is a concrete continuous slab carrying FAP 328 (us 45) over Seminary Creek in Clay County, Illinois. It was built in 2009, so it is 16 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 2,250 vehicles a day, roughly 16% of them trucks, projected to reach 2,374 by 2046. The structure is 102 ft (31.2 m) long and 43 ft wide. If it were closed, the detour would be 65.9 mi (106 km).

Location

Open in Google Maps
CarriesFAP 328 (us 45)
CrossesSeminary Creek
Location3.75 MI S JCT US 50
RouteU.S. Route 45
CountyClay County
StateIllinois
Coordinates38.61796, -88.43824
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 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 rating53.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length102 ft (31.2 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,250 (2023)
Projected traffic2,374 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.9 mi (106 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 FAP 328 (us 45) over Seminary Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is FAP 328 (us 45) over Seminary 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 May 2023.

How much traffic does FAP 328 (us 45) over Seminary Creek carry?

About 2,250 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is FAP 328 (us 45) over Seminary Creek?

The structure is 102 ft (31.2 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns FAP 328 (us 45) over Seminary Creek?

It is owned by the State Highway Agency.