US Bridges

CH-7/FAS-579 over Bn Railroad

Fair

Morgan County, Illinois · .5MI S Arenzville · Structure no. 069320500000000

Built
1988
37 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
171 ft
3 main spans
Daily traffic
2,400
2024 count
Owner
County
County Highway Agency

About this bridge

CH-7/FAS-579 over Bn Railroad is a steel continuous stringer/multi-beam or girder carrying CH-7/FAS-579 over Bn Railroad in Morgan County, Illinois. It was built in 1988, so it is 37 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 2,400 vehicles a day, roughly 12% of them trucks, projected to reach 2,273 by 2046. The structure is 171 ft (52 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCH-7/FAS-579
CrossesBn Railroad
Location.5MI S Arenzville
RouteCounty Highway 0
CountyMorgan County
StateIllinois
Coordinates39.86927, -90.36913
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 rating53.2 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length171 ft (52 m)
Longest span64 ft (19.5 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2024)
Projected traffic2,273 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CH-7/FAS-579 over Bn Railroad built?

It was built in 1988, making it 37 years old in 2025.

What condition is CH-7/FAS-579 over Bn Railroad 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 September 2023.

How much traffic does CH-7/FAS-579 over Bn Railroad carry?

About 2,400 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is CH-7/FAS-579 over Bn Railroad?

The structure is 171 ft (52 m) long with a longest span of 64 ft (19.5 m) and a deck 30 ft wide.

Who owns CH-7/FAS-579 over Bn Railroad?

It is owned by the County Highway Agency.