US Bridges

US 30 FAP 573 over Bn RR

Fair

DeKalb County, Illinois · .5 MI E of Shabbona · Structure no. 019003200000000

Built
1982
43 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
300 ft
3 main spans
Daily traffic
3,050
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 FAP 573 over Bn RR is a steel continuous stringer/multi-beam or girder carrying US 30 FAP 573 over Bn RR in DeKalb County, Illinois. It was built in 1982, so it is 43 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 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 3,050 vehicles a day, roughly 18% of them trucks, projected to reach 4,200 by 2046. The structure is 300 ft (91.4 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesUS 30 FAP 573
CrossesBn RR
Location.5 MI E of Shabbona
RouteU.S. Route 30
CountyDeKalb County
StateIllinois
Coordinates41.76822, -88.85691
Functional classRural Minor 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 inspectionMarch 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length300 ft (91.4 m)
Longest span113 ft (34.4 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,050 (2023)
Projected traffic4,200 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemNo

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 FAP 573 over Bn RR built?

It was built in 1982, making it 43 years old in 2025.

What condition is US 30 FAP 573 over Bn 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 March 2023.

How much traffic does US 30 FAP 573 over Bn RR carry?

About 3,050 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is US 30 FAP 573 over Bn RR?

The structure is 300 ft (91.4 m) long with a longest span of 113 ft (34.4 m) and a deck 35 ft wide.

Who owns US 30 FAP 573 over Bn RR?

It is owned by the State Highway Agency.