US Bridges

Mt. Rd. - TR 171 over Prairie Creek

Fair

Tazewell County, Illinois · SE-4-T23NR3W · Structure no. 090315800000000

Built
1970
55 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mt. Rd. - TR 171 over Prairie Creek is a steel stringer/multi-beam or girder carrying Mt. Rd. - TR 171 over Prairie Creek in Tazewell 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 50 vehicles a day, projected to reach 51 by 2046. The structure is 58 ft (17.7 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMt. Rd. - TR 171
CrossesPrairie Creek
LocationSE-4-T23NR3W
RouteCounty Highway 0
CountyTazewell County
StateIllinois
Coordinates40.46779, -89.44523
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.2 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length58 ft (17.7 m)
Longest span58 ft (17.7 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic51 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
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 Mt. Rd. - TR 171 over Prairie Creek built?

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

What condition is Mt. Rd. - TR 171 over Prairie 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 January 2025.

How much traffic does Mt. Rd. - TR 171 over Prairie Creek carry?

About 50 vehicles per day (2023 count).

How long is Mt. Rd. - TR 171 over Prairie Creek?

The structure is 58 ft (17.7 m) long with a longest span of 58 ft (17.7 m) and a deck 29 ft wide.

Who owns Mt. Rd. - TR 171 over Prairie Creek?

It is owned by the Town or Township Highway Agency.