US Bridges

Ch 2 - FAS 556 over Mosquito Creek

Fair

Christian County, Illinois · 3.0 MI NE Mt Auburn · Structure no. 011300100000000

Built
1961
64 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
157 ft
3 main spans
Daily traffic
650
2021 count
Owner
County
County Highway Agency

About this bridge

Ch 2 - FAS 556 over Mosquito Creek is a steel continuous stringer/multi-beam or girder carrying Ch 2 - FAS 556 over Mosquito Creek in Christian County, Illinois. It was built in 1961, so it is 64 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 650 vehicles a day, roughly 12% of them trucks, projected to reach 657 by 2046. The structure is 157 ft (47.9 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCh 2 - FAS 556
CrossesMosquito Creek
Location3.0 MI NE Mt Auburn
RouteCounty Highway 0
CountyChristian County
StateIllinois
Coordinates39.78197, -89.21247
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length157 ft (47.9 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2021)
Projected traffic657 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Ch 2 - FAS 556 over Mosquito Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Ch 2 - FAS 556 over Mosquito Creek 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 November 2023.

How much traffic does Ch 2 - FAS 556 over Mosquito Creek carry?

About 650 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is Ch 2 - FAS 556 over Mosquito Creek?

The structure is 157 ft (47.9 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns Ch 2 - FAS 556 over Mosquito Creek?

It is owned by the County Highway Agency.