US Bridges

FAS 417 - Ch 11 over Laharpe Creek

Fair

McDonough County, Illinois · NE-29-T7NR4W · Structure no. 055300400000000

Built
1921
104 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
350
2021 count
Owner
County
County Highway Agency

About this bridge

FAS 417 - Ch 11 over Laharpe Creek is a concrete slab carrying FAS 417 - Ch 11 over Laharpe Creek in McDonough County, Illinois. It was built in 1921, so it is 104 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 350 vehicles a day, roughly 17% of them trucks, projected to reach 354 by 2046. The structure is 32 ft (9.8 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAS 417 - Ch 11
CrossesLaharpe Creek
LocationNE-29-T7NR4W
RouteCounty Highway 0
CountyMcDonough County
StateIllinois
Coordinates40.57752, -90.86608
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width26 ft (8 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2021)
Projected traffic354 by 2046
Trucks17%
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 417 - Ch 11 over Laharpe Creek built?

It was built in 1921, making it 104 years old in 2025.

What condition is FAS 417 - Ch 11 over Laharpe 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 December 2023.

How much traffic does FAS 417 - Ch 11 over Laharpe Creek carry?

About 350 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is FAS 417 - Ch 11 over Laharpe Creek?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 26 ft wide.

Who owns FAS 417 - Ch 11 over Laharpe Creek?

It is owned by the County Highway Agency.