US Bridges

TR 355 over Trib to Spring Crk

Good

Iroquois County, Illinois · 0000E 300N · Structure no. 038434900000000

Built
2004
21 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
50
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 355 over Trib to Spring Crk is a prestressed concrete box beam or girders - multiple carrying TR 355 over Trib to Spring Crk in Iroquois County, Illinois. It was built in 2004, so it is 21 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 8 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 32% of them trucks, projected to reach 202 by 2046. The structure is 47 ft (14.2 m) long and 30 ft wide.

CarriesTR 355
CrossesTrib to Spring Crk
Location0000E 300N
RouteCounty Highway 0
Coordinates40.53155, -88.11781
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length47 ft (14.2 m)
Longest span45 ft (13.6 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic202 by 2046
Trucks32%
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 355 over Trib to Spring Crk built?

It was built in 2004, making it 21 years old in 2025.

What condition is TR 355 over Trib to Spring Crk 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 TR 355 over Trib to Spring Crk carry?

About 50 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is TR 355 over Trib to Spring Crk?

The structure is 47 ft (14.2 m) long with a longest span of 45 ft (13.6 m) and a deck 30 ft wide.

Who owns TR 355 over Trib to Spring Crk?

It is owned by the Town or Township Highway Agency.