US Bridges

Il 15 / Missouri a over A&srr

Fair

St. Clair County, Illinois · 0.50 MI NW of Il 163 · Structure no. 082025900000000

Built
1980
45 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
193 ft
3 main spans
Daily traffic
13,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 15 / Missouri a over A&srr is a steel continuous stringer/multi-beam or girder carrying Il 15 / Missouri a over A&srr in St. Clair County, Illinois. It was built in 1980, so it is 45 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 13,800 vehicles a day, roughly 9% of them trucks, projected to reach 12,524 by 2046. The structure is 193 ft (58.8 m) long and 89 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIl 15 / Missouri a
CrossesA&srr
Location0.50 MI NW of Il 163
RouteState Highway 15
CountySt. Clair County
StateIllinois
Coordinates38.59372, -90.12078
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length193 ft (58.8 m)
Longest span76 ft (23.2 m)
Deck width89 ft (27.2 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,800 (2023)
Projected traffic12,524 by 2046
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 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 Il 15 / Missouri a over A&srr built?

It was built in 1980, making it 45 years old in 2025.

What condition is Il 15 / Missouri a over A&srr 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 March 2024.

How much traffic does Il 15 / Missouri a over A&srr carry?

About 13,800 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Il 15 / Missouri a over A&srr?

The structure is 193 ft (58.8 m) long with a longest span of 76 ft (23.2 m) and a deck 89 ft wide.

Who owns Il 15 / Missouri a over A&srr?

It is owned by the State Highway Agency.