US Bridges

FAS 923 over Unnamed Stream

Good

Union County, Illinois · W Edge Unionco Forst · Structure no. 091500600000000

Built
1970
55 years old
Condition
Good
inspected February 2025
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
400
2020 count
Owner
County
County Highway Agency

About this bridge

FAS 923 over Unnamed Stream is a concrete continuous culvert carrying FAS 923 over Unnamed Stream in Union County, Illinois. It was built in 1970, so it is 55 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 400 vehicles a day, roughly 4% of them trucks, projected to reach 404 by 2046. The structure is 29 ft (8.9 m) long. If it were closed, the detour would be 19.9 mi (32 km).

CarriesFAS 923
CrossesUnnamed Stream
LocationW Edge Unionco Forst
RouteCounty Highway 0
Coordinates37.48597, -89.36692
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 15
Structure length29 ft (8.9 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2020)
Projected traffic404 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 923 over Unnamed Stream built?

It was built in 1970, making it 55 years old in 2025.

What condition is FAS 923 over Unnamed Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does FAS 923 over Unnamed Stream carry?

About 400 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is FAS 923 over Unnamed Stream?

The structure is 29 ft (8.9 m) long with a longest span of 14 ft (4.3 m).

Who owns FAS 923 over Unnamed Stream?

It is owned by the County Highway Agency.