US Bridges

TR 354A over Otter Creek

Good

LaSalle County, Illinois · E 21st N 1440 · Structure no. 050320300000000

Built
1926
99 years old, rebuilt 1989
Condition
Good
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
50
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 354A over Otter Creek is a prestressed concrete box beam or girders - multiple carrying TR 354A over Otter Creek in LaSalle County, Illinois. It was built in 1926 and reconstructed in 1989, so it is 99 years old, older 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 10% of them trucks, projected to reach 51 by 2046. The structure is 43 ft (13.1 m) long and 26 ft wide.

CarriesTR 354A
CrossesOtter Creek
LocationE 21st N 1440
RouteCounty Highway 0
Coordinates41.14043, -88.759
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating47.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span41 ft (12.6 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2016)
Projected traffic51 by 2046
Trucks10%
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 354A over Otter Creek built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1989.

What condition is TR 354A over Otter 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 June 2024.

How much traffic does TR 354A over Otter Creek carry?

About 50 vehicles per day (2016 count), of which roughly 10% are trucks.

How long is TR 354A over Otter Creek?

The structure is 43 ft (13.1 m) long with a longest span of 41 ft (12.6 m) and a deck 26 ft wide.

Who owns TR 354A over Otter Creek?

It is owned by the Town or Township Highway Agency.