US Bridges

FAS 1176 Ch 10 over Fourmile Grove

Fair

LaSalle County, Illinois · E 7th N 4725 · Structure no. 050300500000000

Built
1935
90 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
250
2020 count
Owner
County
County Highway Agency

About this bridge

FAS 1176 Ch 10 over Fourmile Grove is a prestressed concrete box beam or girders - multiple carrying FAS 1176 Ch 10 over Fourmile Grove in LaSalle County, Illinois. It was built in 1935, so it is 90 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 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 250 vehicles a day, roughly 7% of them trucks, projected to reach 253 by 2046. The structure is 53 ft (16.3 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesFAS 1176 Ch 10
CrossesFourmile Grove
LocationE 7th N 4725
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.61512, -89.03427
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating31.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length53 ft (16.3 m)
Longest span51 ft (15.5 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2020)
Projected traffic253 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 1176 Ch 10 over Fourmile Grove built?

It was built in 1935, making it 90 years old in 2025.

What condition is FAS 1176 Ch 10 over Fourmile Grove 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 April 2023.

How much traffic does FAS 1176 Ch 10 over Fourmile Grove carry?

About 250 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is FAS 1176 Ch 10 over Fourmile Grove?

The structure is 53 ft (16.3 m) long with a longest span of 51 ft (15.5 m) and a deck 30 ft wide.

Who owns FAS 1176 Ch 10 over Fourmile Grove?

It is owned by the County Highway Agency.