US Bridges

US 30 over Il 31 & BNSF RR

Fair

Kane County, Illinois · 3.3 M NW of US 34 · Structure no. 045003900000000

Built
1958
67 years old, rebuilt 2014
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
618 ft
10 main spans
Daily traffic
31,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over Il 31 & BNSF RR is a steel continuous stringer/multi-beam or girder carrying US 30 over Il 31 & BNSF RR in Kane County, Illinois. It was built in 1958 and reconstructed in 2014, so it is 67 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 31,600 vehicles a day, roughly 6% of them trucks, projected to reach 39,162 by 2046. The structure is 618 ft (188.4 m) long and 84 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 30
CrossesIl 31 & BNSF RR
Location3.3 M NW of US 34
RouteU.S. Route 30
CountyKane County
StateIllinois
Coordinates41.72452, -88.35057
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionOctober 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.2 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length618 ft (188.4 m)
Longest span78 ft (23.9 m)
Deck width84 ft (25.7 m)
Roadway width78 ft (23.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,600 (2023)
Projected traffic39,162 by 2046
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed6.8 mi (11 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 US 30 over Il 31 & BNSF RR built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2014.

What condition is US 30 over Il 31 & BNSF RR 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 October 2024.

How much traffic does US 30 over Il 31 & BNSF RR carry?

About 31,600 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 30 over Il 31 & BNSF RR?

The structure is 618 ft (188.4 m) long with a longest span of 78 ft (23.9 m) and a deck 84 ft wide.

Who owns US 30 over Il 31 & BNSF RR?

It is owned by the State Highway Agency.