US Bridges

TR 18 over Pulaski Slough

Good

Pulaski County, Illinois · 2 MI SW of Pulaski · Structure no. 077306400000000

Built
1978
47 years old
Condition
Good
inspected January 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
125
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 18 over Pulaski Slough is a prestressed concrete box beam or girders - multiple carrying TR 18 over Pulaski Slough in Pulaski County, Illinois. It was built in 1978, so it is 47 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 125 vehicles a day, roughly 26% of them trucks, projected to reach 126 by 2046. The structure is 53 ft (16.3 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR 18
CrossesPulaski Slough
Location2 MI SW of Pulaski
RouteCounty Highway 0
Coordinates37.19173, -89.23077
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.7 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length53 ft (16.3 m)
Longest span51 ft (15.6 m)
Deck width25 ft (7.5 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2023)
Projected traffic126 by 2046
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 TR 18 over Pulaski Slough built?

It was built in 1978, making it 47 years old in 2025.

What condition is TR 18 over Pulaski Slough in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does TR 18 over Pulaski Slough carry?

About 125 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is TR 18 over Pulaski Slough?

The structure is 53 ft (16.3 m) long with a longest span of 51 ft (15.6 m) and a deck 25 ft wide.

Who owns TR 18 over Pulaski Slough?

It is owned by the Town or Township Highway Agency.