US Bridges

FAU5789 - US 6 over Mosquito Creek

Fair

Henry County, Illinois · 1 Mi. E. Coal Valley · Structure no. 037014300000000

Built
1991
34 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
109 ft
1 main span
Daily traffic
4,550
2022 count
Owner
State
State Highway Agency

About this bridge

FAU5789 - US 6 over Mosquito Creek is a prestressed concrete stringer/multi-beam or girder carrying FAU5789 - US 6 over Mosquito Creek in Henry County, Illinois. It was built in 1991, so it is 34 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 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 4,550 vehicles a day, roughly 11% of them trucks, projected to reach 5,670 by 2046. The structure is 109 ft (33.2 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFAU5789 - US 6
CrossesMosquito Creek
Location1 Mi. E. Coal Valley
RouteU.S. Route 6
CountyHenry County
StateIllinois
Coordinates41.45594, -90.38351
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length109 ft (33.2 m)
Longest span107 ft (32.5 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,550 (2022)
Projected traffic5,670 by 2046
Trucks11%
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

OwnerState Highway Agency
Maintained byState 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 FAU5789 - US 6 over Mosquito Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is FAU5789 - US 6 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 September 2024.

How much traffic does FAU5789 - US 6 over Mosquito Creek carry?

About 4,550 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is FAU5789 - US 6 over Mosquito Creek?

The structure is 109 ft (33.2 m) long with a longest span of 107 ft (32.5 m) and a deck 39 ft wide.

Who owns FAU5789 - US 6 over Mosquito Creek?

It is owned by the State Highway Agency.