US Bridges

TR 159 over Spring Creek

Fair

Iroquois County, Illinois · 5 MI E 1 MI N Gilman · Structure no. 038405500000000

Built
2009
16 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
262 ft
4 main spans
Daily traffic
50
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 159 over Spring Creek is a prestressed concrete box beam or girders - multiple carrying TR 159 over Spring Creek in Iroquois County, Illinois. It was built in 2009, so it is 16 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 50 vehicles a day, roughly 24% of them trucks, projected to reach 354 by 2046. The structure is 262 ft (80 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesTR 159
CrossesSpring Creek
Location5 MI E 1 MI N Gilman
RouteCounty Highway 0
CountyIroquois County
StateIllinois
Coordinates40.78384, -87.90217
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length262 ft (80 m)
Longest span80 ft (24.4 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 traffic354 by 2046
Trucks24%
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 159 over Spring Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is TR 159 over Spring 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 April 2023.

How much traffic does TR 159 over Spring Creek carry?

About 50 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is TR 159 over Spring Creek?

The structure is 262 ft (80 m) long with a longest span of 80 ft (24.4 m) and a deck 30 ft wide.

Who owns TR 159 over Spring Creek?

It is owned by the Town or Township Highway Agency.