US Bridges

US 30 over River St(montgomery)

Fair

Kane County, Illinois · 4.5 M E of Il 47 · Structure no. 047003000000000

Built
1958
67 years old, rebuilt 2000
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
119 ft
3 main spans
Daily traffic
31,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over River St(montgomery) is a steel continuous stringer/multi-beam or girder carrying US 30 over River St(montgomery) in Kane County, Illinois. It was built in 1958 and reconstructed in 2000, 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 42,693 by 2046. The structure is 119 ft (36.3 m) long and 72 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 30
CrossesRiver St(montgomery)
Location4.5 M E of Il 47
RouteU.S. Route 30
CountyKane County
StateIllinois
Coordinates41.72284, -88.34729
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 inspectionApril 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.2 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length119 ft (36.3 m)
Longest span46 ft (13.9 m)
Deck width72 ft (21.8 m)
Roadway width60 ft (18.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,600 (2023)
Projected traffic42,693 by 2046
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
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 River St(montgomery) built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2000.

What condition is US 30 over River St(montgomery) 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 April 2024.

How much traffic does US 30 over River St(montgomery) carry?

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

How long is US 30 over River St(montgomery)?

The structure is 119 ft (36.3 m) long with a longest span of 46 ft (13.9 m) and a deck 72 ft wide.

Who owns US 30 over River St(montgomery)?

It is owned by the State Highway Agency.