US Bridges

TR 310 over Covel Creek

Fair

LaSalle County, Illinois · E18th N2475th · Structure no. 050350700000000

Built
1988
37 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
165 ft
3 main spans
Daily traffic
100
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 310 over Covel Creek is a prestressed concrete box beam or girders - multiple carrying TR 310 over Covel Creek in LaSalle County, Illinois. It was built in 1988, so it is 37 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 100 vehicles a day, projected to reach 101 by 2046. The structure is 165 ft (50.3 m) long and 24 ft wide.

CarriesTR 310
CrossesCovel Creek
LocationE18th N2475th
RouteCounty Highway 0
Coordinates41.29236, -88.81708
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length165 ft (50.3 m)
Longest span77 ft (23.5 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2016)
Projected traffic101 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 310 over Covel Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is TR 310 over Covel Creek 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 2024.

How much traffic does TR 310 over Covel Creek carry?

About 100 vehicles per day (2016 count).

How long is TR 310 over Covel Creek?

The structure is 165 ft (50.3 m) long with a longest span of 77 ft (23.5 m) and a deck 24 ft wide.

Who owns TR 310 over Covel Creek?

It is owned by the Town or Township Highway Agency.