US Bridges

Il 15 over NSRR Icrr

Fair

St. Clair County, Illinois · .70MI E JCT Il 157 · Structure no. 082004100000000

Built
1940
85 years old, rebuilt 1985
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
320 ft
4 main spans
Daily traffic
28,700
2023 count
Owner
State
State Highway Agency

About this bridge

Il 15 over NSRR Icrr is a steel continuous stringer/multi-beam or girder carrying Il 15 over NSRR Icrr in St. Clair County, Illinois. It was built in 1940 and reconstructed in 1985, so it is 85 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 5 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 28,700 vehicles a day, roughly 8% of them trucks, projected to reach 28,684 by 2046. The structure is 320 ft (97.5 m) long and 71 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIl 15
CrossesNSRR Icrr
Location.70MI E JCT Il 157
RouteState Highway 15
CountySt. Clair County
StateIllinois
Coordinates38.55975, -90.08285
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating51.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length320 ft (97.5 m)
Longest span88 ft (26.8 m)
Deck width71 ft (21.7 m)
Roadway width65 ft (19.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,700 (2023)
Projected traffic28,684 by 2046
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.2 mi (10 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 over NSRR Icrr built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1985.

What condition is Il 15 over NSRR Icrr 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 over NSRR Icrr carry?

About 28,700 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Il 15 over NSRR Icrr?

The structure is 320 ft (97.5 m) long with a longest span of 88 ft (26.8 m) and a deck 71 ft wide.

Who owns Il 15 over NSRR Icrr?

It is owned by the State Highway Agency.