US Bridges

FAS 174N/CH 41 over Sutphens Run

Fair

LaSalle County, Illinois · E 1351 N 4500 · Structure no. 050344600000000

Built
1977
48 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
950
2020 count
Owner
County
County Highway Agency

About this bridge

FAS 174N/CH 41 over Sutphens Run is a prestressed concrete box beam or girders - multiple carrying FAS 174N/CH 41 over Sutphens Run in LaSalle County, Illinois. It was built in 1977, so it is 48 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 950 vehicles a day, roughly 5% of them trucks, projected to reach 960 by 2046. The structure is 51 ft (15.5 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesFAS 174N/CH 41
CrossesSutphens Run
LocationE 1351 N 4500
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.58178, -88.92182
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.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span49 ft (14.9 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2020)
Projected traffic960 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 174N/CH 41 over Sutphens Run built?

It was built in 1977, making it 48 years old in 2025.

What condition is FAS 174N/CH 41 over Sutphens Run 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 May 2023.

How much traffic does FAS 174N/CH 41 over Sutphens Run carry?

About 950 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is FAS 174N/CH 41 over Sutphens Run?

The structure is 51 ft (15.5 m) long with a longest span of 49 ft (14.9 m) and a deck 40 ft wide.

Who owns FAS 174N/CH 41 over Sutphens Run?

It is owned by the County Highway Agency.