US Bridges

FAS 1405-CH 12 over North Henderson CR

Fair

Mercer County, Illinois · W.CTR-14-T13NR1W · Structure no. 066301000000000

Built
1956
69 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
54 ft
3 main spans
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

FAS 1405-CH 12 over North Henderson CR is a concrete continuous slab carrying FAS 1405-CH 12 over North Henderson CR in Mercer County, Illinois. It was built in 1956, so it is 69 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 50 vehicles a day, roughly 38% of them trucks, projected to reach 51 by 2046. The structure is 54 ft (16.5 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFAS 1405-CH 12
CrossesNorth Henderson CR
LocationW.CTR-14-T13NR1W
RouteCounty Highway 0
CountyMercer County
StateIllinois
Coordinates41.11814, -90.47634
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating26.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length54 ft (16.5 m)
Longest span20 ft (6.1 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic51 by 2046
Trucks38%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$243,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 1405-CH 12 over North Henderson CR built?

It was built in 1956, making it 69 years old in 2025.

What condition is FAS 1405-CH 12 over North Henderson CR 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 October 2023.

How much traffic does FAS 1405-CH 12 over North Henderson CR carry?

About 50 vehicles per day (2024 count), of which roughly 38% are trucks.

How long is FAS 1405-CH 12 over North Henderson CR?

The structure is 54 ft (16.5 m) long with a longest span of 20 ft (6.1 m) and a deck 29 ft wide.

Who owns FAS 1405-CH 12 over North Henderson CR?

It is owned by the County Highway Agency.