US Bridges

TR 173 over Stream

Fair

Piatt County, Illinois · 3.5 MI Ssw Cerro Gor · Structure no. 074315900000000

Built
1974
51 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
63 ft
2 main spans
Daily traffic
35
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 173 over Stream is a prestressed concrete box beam or girders - multiple carrying TR 173 over Stream in Piatt County, Illinois. It was built in 1974, so it is 51 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 35 vehicles a day, roughly 34% of them trucks, projected to reach 35 by 2046. The structure is 63 ft (19.1 m) long and 26 ft wide.

Location

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CarriesTR 173
CrossesStream
Location3.5 MI Ssw Cerro Gor
RouteCounty Highway 0
CountyPiatt County
StateIllinois
Coordinates39.8648, -88.65163
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 inspectionJanuary 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating28.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 15
Structure length63 ft (19.1 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2020)
Projected traffic35 by 2046
Trucks34%
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 173 over Stream built?

It was built in 1974, making it 51 years old in 2025.

What condition is TR 173 over Stream 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 2024.

How much traffic does TR 173 over Stream carry?

About 35 vehicles per day (2020 count), of which roughly 34% are trucks.

How long is TR 173 over Stream?

The structure is 63 ft (19.1 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns TR 173 over Stream?

It is owned by the Town or Township Highway Agency.