US Bridges

FAS 461 CO HWY 4 over Quiver Ditch

Fair

Mason County, Illinois · Forest City Cl · Structure no. 063300600000000

Built
1948
77 years old, rebuilt 1993
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
105 ft
3 main spans
Daily traffic
550
2024 count
Owner
County
County Highway Agency

About this bridge

FAS 461 CO HWY 4 over Quiver Ditch is a steel continuous stringer/multi-beam or girder carrying FAS 461 CO HWY 4 over Quiver Ditch in Mason County, Illinois. It was built in 1948 and reconstructed in 1993, so it is 77 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 6 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 550 vehicles a day, roughly 13% of them trucks, projected to reach 505 by 2046. The structure is 105 ft (32.1 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAS 461 CO HWY 4
CrossesQuiver Ditch
LocationForest City Cl
RouteCounty Highway 0
CountyMason County
StateIllinois
Coordinates40.36597, -89.82826
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length105 ft (32.1 m)
Longest span39 ft (11.8 m)
Deck width29 ft (8.9 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2024)
Projected traffic505 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 461 CO HWY 4 over Quiver Ditch built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1993.

What condition is FAS 461 CO HWY 4 over Quiver Ditch 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 FAS 461 CO HWY 4 over Quiver Ditch carry?

About 550 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is FAS 461 CO HWY 4 over Quiver Ditch?

The structure is 105 ft (32.1 m) long with a longest span of 39 ft (11.8 m) and a deck 29 ft wide.

Who owns FAS 461 CO HWY 4 over Quiver Ditch?

It is owned by the County Highway Agency.