US Bridges

US 34 FAP 587 over Sutphens Run

Fair

LaSalle County, Illinois · 8.71 MI E of Ill 251 · Structure no. 050019000000000

Built
1984
41 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
119 ft
3 main spans
Daily traffic
1,800
2023 count
Owner
State
State Highway Agency

About this bridge

US 34 FAP 587 over Sutphens Run is a steel continuous stringer/multi-beam or girder carrying US 34 FAP 587 over Sutphens Run in LaSalle County, Illinois. It was built in 1984, so it is 41 years old, younger 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 1,800 vehicles a day, roughly 12% of them trucks, projected to reach 2,020 by 2046. The structure is 119 ft (36.3 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 34 FAP 587
CrossesSutphens Run
Location8.71 MI E of Ill 251
RouteU.S. Route 34
CountyLaSalle County
StateIllinois
Coordinates41.5771, -88.99406
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length119 ft (36.3 m)
Longest span44 ft (13.4 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2023)
Projected traffic2,020 by 2046
Trucks12%
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

OwnerState Highway Agency
Maintained byState 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 US 34 FAP 587 over Sutphens Run built?

It was built in 1984, making it 41 years old in 2025.

What condition is US 34 FAP 587 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 January 2023.

How much traffic does US 34 FAP 587 over Sutphens Run carry?

About 1,800 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 34 FAP 587 over Sutphens Run?

The structure is 119 ft (36.3 m) long with a longest span of 44 ft (13.4 m) and a deck 39 ft wide.

Who owns US 34 FAP 587 over Sutphens Run?

It is owned by the State Highway Agency.