US Bridges

TR-187 over Spring Creek

Fair

LaSalle County, Illinois · N 37th E 160 · Structure no. 050341100000000

Built
1970
55 years old
Condition
Fair
inspected June 2024
Type
Channel Beam
Concrete
Length
35 ft
1 main span
Daily traffic
200
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-187 over Spring Creek is a concrete channel beam carrying TR-187 over Spring Creek in LaSalle County, Illinois. It was built in 1970, so it is 55 years old, older 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 5 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 200 vehicles a day, roughly 4% of them trucks, projected to reach 152 by 2046. The structure is 35 ft (10.7 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesTR-187
CrossesSpring Creek
LocationN 37th E 160
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.46919, -89.13506
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length35 ft (10.7 m)
Longest span33 ft (10.1 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic152 by 2046
Trucks4%
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-187 over Spring Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is TR-187 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 June 2024.

How much traffic does TR-187 over Spring Creek carry?

About 200 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is TR-187 over Spring Creek?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 30 ft wide.

Who owns TR-187 over Spring Creek?

It is owned by the Town or Township Highway Agency.