US Bridges

FAP 325(IL 16) over Piasa Creek

Good

Macoupin County, Illinois · .55 MI E FAP10/IL111 · Structure no. 059251300000000

Built
2024
1 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
45 ft
3 main spans
Daily traffic
2,400
2023 count
Owner
State
State Highway Agency

About this bridge

FAP 325(IL 16) over Piasa Creek is a concrete culvert carrying FAP 325(IL 16) over Piasa Creek in Macoupin County, Illinois. It was built in 2024, so it is 1 years old, younger 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,400 vehicles a day, roughly 8% of them trucks, projected to reach 2,626 by 2046. The structure is 45 ft (13.8 m) long and 44 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesFAP 325(IL 16)
CrossesPiasa Creek
Location.55 MI E FAP10/IL111
RouteState Highway 16
CountyMacoupin County
StateIllinois
Coordinates39.11606, -90.13149
Functional classRural Principal Arterial - Other

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 protection9 ExcellentNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating60 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length45 ft (13.8 m)
Longest span15 ft (4.6 m)
Deck width44 ft (13.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2023)
Projected traffic2,626 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAP 325(IL 16) over Piasa Creek built?

It was built in 2024, making it 1 years old in 2025.

What condition is FAP 325(IL 16) over Piasa Creek 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 October 2024.

How much traffic does FAP 325(IL 16) over Piasa Creek carry?

About 2,400 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is FAP 325(IL 16) over Piasa Creek?

The structure is 45 ft (13.8 m) long with a longest span of 15 ft (4.6 m) and a deck 44 ft wide.

Who owns FAP 325(IL 16) over Piasa Creek?

It is owned by the State Highway Agency.