US Bridges

US 34 FAP 587 over Sutphens Run

Good

LaSalle County, Illinois · 8.3 MI E of I-39 · Structure no. 050026200000000

Built
2023
2 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
135 ft
3 main spans
Daily traffic
1,600
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 2023, so it is 2 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,600 vehicles a day, roughly 19% of them trucks, projected to reach 3,186 by 2043. The structure is 135 ft (41.1 m) long and 35 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesUS 34 FAP 587
CrossesSutphens Run
Location8.3 MI E of I-39
RouteU.S. Route 34
CountyLaSalle County
StateIllinois
Coordinates41.57781, -88.92791
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating58.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length135 ft (41.1 m)
Longest span50 ft (15.2 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic3,186 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 34 FAP 587 over Sutphens Run built?

It was built in 2023, making it 2 years old in 2025.

What condition is US 34 FAP 587 over Sutphens Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

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

About 1,600 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is US 34 FAP 587 over Sutphens Run?

The structure is 135 ft (41.1 m) long with a longest span of 50 ft (15.2 m) and a deck 35 ft wide.

Who owns US 34 FAP 587 over Sutphens Run?

It is owned by the State Highway Agency.