US Bridges

TR 23 (stiritz Rd) over Interstate 57

Poor

Williamson County, Illinois · 0.6 MI W of Ill 37 · Structure no. 100005300000000

Built
1961
64 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
233 ft
4 main spans
Daily traffic
1,000
2021 count
Owner
State
State Highway Agency

About this bridge

TR 23 (stiritz Rd) over Interstate 57 is a steel continuous stringer/multi-beam or girder carrying TR 23 (stiritz Rd) over Interstate 57 in Williamson County, Illinois. It was built in 1961, so it is 64 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,000 vehicles a day, roughly 23% of them trucks, projected to reach 1,010 by 2046. The structure is 233 ft (71 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTR 23 (stiritz Rd)
CrossesInterstate 57
Location0.6 MI W of Ill 37
RouteCounty Highway 0
CountyWilliamson County
StateIllinois
Coordinates37.83972, -88.94456
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length233 ft (71 m)
Longest span75 ft (23 m)
Deck width32 ft (9.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2021)
Projected traffic1,010 by 2046
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$178,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was TR 23 (stiritz Rd) over Interstate 57 built?

It was built in 1961, making it 64 years old in 2025.

What condition is TR 23 (stiritz Rd) over Interstate 57 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does TR 23 (stiritz Rd) over Interstate 57 carry?

About 1,000 vehicles per day (2021 count), of which roughly 23% are trucks.

How long is TR 23 (stiritz Rd) over Interstate 57?

The structure is 233 ft (71 m) long with a longest span of 75 ft (23 m) and a deck 32 ft wide.

Who owns TR 23 (stiritz Rd) over Interstate 57?

It is owned by the State Highway Agency.