US Bridges

Ms 6490 in Mendota over L. Vermillion CR

Fair

LaSalle County, Illinois · E 4th N 4345 · Structure no. 050309300000000

Built
1965
60 years old, rebuilt 2013
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
225
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Ms 6490 in Mendota over L. Vermillion CR is a prestressed concrete box beam or girders - multiple carrying Ms 6490 in Mendota over L. Vermillion CR in LaSalle County, Illinois. It was built in 1965 and reconstructed in 2013, so it is 60 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 225 vehicles a day, roughly 16% of them trucks, projected to reach 227 by 2046. The structure is 55 ft (16.8 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMs 6490 in Mendota
CrossesL. Vermillion CR
LocationE 4th N 4345
RouteCity Street 0
CountyLaSalle County
StateIllinois
Coordinates41.5616, -89.08934
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating48.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length55 ft (16.8 m)
Longest span51 ft (15.5 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2020)
Projected traffic227 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Ms 6490 in Mendota over L. Vermillion CR built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2013.

What condition is Ms 6490 in Mendota over L. Vermillion CR 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 August 2023.

How much traffic does Ms 6490 in Mendota over L. Vermillion CR carry?

About 225 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is Ms 6490 in Mendota over L. Vermillion CR?

The structure is 55 ft (16.8 m) long with a longest span of 51 ft (15.5 m) and a deck 26 ft wide.

Who owns Ms 6490 in Mendota over L. Vermillion CR?

It is owned by the City or Municipal Highway Agency.