US Bridges

10th Ave & 4th ST over Mendota Creek

Good

LaSalle County, Illinois · 10th Ave & 4th ST · Structure no. 050701400000000

Built
2001
24 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
50
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

10th Ave & 4th ST over Mendota Creek is a concrete culvert carrying 10th Ave & 4th ST over Mendota Creek in LaSalle County, Illinois. It was built in 2001, so it is 24 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 18% of them trucks, projected to reach 51 by 2046. The structure is 26 ft (7.9 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries10th Ave & 4th ST
CrossesMendota Creek
Location10th Ave & 4th ST
RouteCity Street 0
CountyLaSalle County
StateIllinois
Coordinates41.54515, -89.12298
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic51 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 10th Ave & 4th ST over Mendota Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is 10th Ave & 4th ST over Mendota Creek 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 August 2024.

How much traffic does 10th Ave & 4th ST over Mendota Creek carry?

About 50 vehicles per day (2020 count), of which roughly 18% are trucks.

How long is 10th Ave & 4th ST over Mendota Creek?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 27 ft wide.

Who owns 10th Ave & 4th ST over Mendota Creek?

It is owned by the City or Municipal Highway Agency.