US Bridges

TR 402 over Otter Creek

Poor

LaSalle County, Illinois · E 24th N 1550 · Structure no. 050501100000000

Built
1959
66 years old
Condition
Poor
inspected June 2024
Type
Culvert
Steel
Length
50 ft
4 main spans
Daily traffic
50
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 402 over Otter Creek is a steel culvert carrying TR 402 over Otter Creek in LaSalle County, Illinois. It was built in 1959, so it is 66 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 50 vehicles a day, projected to reach 51 by 2046. The structure is 50 ft (15.2 m) long and 16 ft wide.

Location

Open in Google Maps
CarriesTR 402
CrossesOtter Creek
LocationE 24th N 1550
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.15814, -88.70227
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span12 ft (3.7 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2016)
Projected traffic51 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 402 over Otter Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is TR 402 over Otter Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does TR 402 over Otter Creek carry?

About 50 vehicles per day (2016 count).

How long is TR 402 over Otter Creek?

The structure is 50 ft (15.2 m) long with a longest span of 12 ft (3.7 m) and a deck 16 ft wide.

Who owns TR 402 over Otter Creek?

It is owned by the Town or Township Highway Agency.