US Bridges

TR 354 a over Otter Creek

Fair

LaSalle County, Illinois · E 21st RD N 1560 · Structure no. 050351900000000

Built
1987
38 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
25
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 354 a over Otter Creek is a prestressed concrete box beam or girders - multiple carrying TR 354 a over Otter Creek in LaSalle County, Illinois. It was built in 1987, so it is 38 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 25 vehicles a day, projected to reach 25 by 2046. The structure is 52 ft (15.8 m) long and 24 ft wide.

CarriesTR 354 a
CrossesOtter Creek
LocationE 21st RD N 1560
RouteCounty Highway 0
Coordinates41.15805, -88.75919
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 protection8 Very GoodNo problems noted.
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 adequacy7: Better than present minimum 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 spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span49 ft (14.9 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2016)
Projected traffic25 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 354 a over Otter Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is TR 354 a over Otter 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 354 a over Otter Creek carry?

About 25 vehicles per day (2016 count).

How long is TR 354 a over Otter Creek?

The structure is 52 ft (15.8 m) long with a longest span of 49 ft (14.9 m) and a deck 24 ft wide.

Who owns TR 354 a over Otter Creek?

It is owned by the Town or Township Highway Agency.