US Bridges

FAP 325(IL 16) over Piasa Creek

Good

Macoupin County, Illinois · 1.9 MI E FAP10/IL111 · Structure no. 059250900000000

Built
2023
2 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
2,200
2023 count
Owner
State
State Highway Agency

About this bridge

FAP 325(IL 16) over Piasa Creek is a concrete continuous culvert carrying FAP 325(IL 16) over Piasa Creek in Macoupin County, Illinois. It was built in 2023, so it is 2 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 2,200 vehicles a day, roughly 13% of them trucks, projected to reach 2,677 by 2046. The structure is 30 ft (9 m) long and 36 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
Location1.9 MI E FAP10/IL111
RouteState Highway 16
CountyMacoupin County
StateIllinois
Coordinates39.11651, -90.10624
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.5 US tons
Inventory rating62.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length30 ft (9 m)
Longest span10 ft (3 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2023)
Projected traffic2,677 by 2046
Trucks13%
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 2023, making it 2 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 November 2023.

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

About 2,200 vehicles per day (2023 count), of which roughly 13% are trucks.

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

The structure is 30 ft (9 m) long with a longest span of 10 ft (3 m) and a deck 36 ft wide.

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

It is owned by the State Highway Agency.