US Bridges

FAS 431 over Mud Creek

PoorPosted for load

Hancock County, Illinois · 2.3 MI S. of West Po · Structure no. 034330200000000

Built
1959
66 years old
Condition
Poor
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
108 ft
3 main spans
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

FAS 431 over Mud Creek is a steel stringer/multi-beam or girder carrying FAS 431 over Mud Creek in Hancock County, Illinois. It was built in 1959, so it is 66 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, roughly 3% of them trucks, projected to reach 253 by 2046. The structure is 108 ft (32.9 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFAS 431
CrossesMud Creek
Location2.3 MI S. of West Po
RouteCounty Highway 0
Coordinates40.20725, -91.18295
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.5 US tons
Inventory rating30.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length108 ft (32.9 m)
Longest span42 ft (12.8 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic253 by 2046
Trucks3%
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 FAS 431 over Mud Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is FAS 431 over Mud Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does FAS 431 over Mud Creek carry?

About 200 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is FAS 431 over Mud Creek?

The structure is 108 ft (32.9 m) long with a longest span of 42 ft (12.8 m) and a deck 29 ft wide.

Who owns FAS 431 over Mud Creek?

It is owned by the County Highway Agency.