US Bridges

Il 251 over Il Rv/Water St/Rr

Fair

LaSalle County, Illinois · 0.1 MI S of US 6 · Structure no. 050007900000000

Built
1958
67 years old, rebuilt 1992
Condition
Fair
inspected June 2023
Type
Truss - Thru
Steel Continuous
Length
2,292 ft
3 main spans
Daily traffic
9,700
2023 count
Owner
State
State Highway Agency

About this bridge

Il 251 over Il Rv/Water St/Rr is a steel continuous truss - thru carrying Il 251 over Il Rv/Water St/Rr in LaSalle County, Illinois. It was built in 1958 and reconstructed in 1992, so it is 67 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 9,700 vehicles a day, roughly 4% of them trucks, projected to reach 11,413 by 2046. The structure is 2,292 ft (698.5 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIl 251
CrossesIl Rv/Water St/Rr
Location0.1 MI S of US 6
RouteState Highway 251
CountyLaSalle County
StateIllinois
Coordinates41.32586, -89.11995
Functional classUrban Other Principal 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.4 US tons
Inventory rating36.8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+10 approach)
Design loadHS 20
Structure length2,292 ft (698.5 m)
Longest span477 ft (145.4 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,700 (2023)
Projected traffic11,413 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Il 251 over Il Rv/Water St/Rr built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1992.

What condition is Il 251 over Il Rv/Water St/Rr 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 June 2023.

How much traffic does Il 251 over Il Rv/Water St/Rr carry?

About 9,700 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Il 251 over Il Rv/Water St/Rr?

The structure is 2,292 ft (698.5 m) long with a longest span of 477 ft (145.4 m) and a deck 34 ft wide.

Who owns Il 251 over Il Rv/Water St/Rr?

It is owned by the State Highway Agency.