US Bridges

I-72/US 36 (wb) over The Sny Slough

Fair

Pike County, Illinois · 2M SW I-172 · Structure no. 075015300000000

Built
1998
27 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
200 ft
2 main spans
Daily traffic
7,250
2023 count
Owner
State
State Highway Agency

About this bridge

I-72/US 36 (wb) over The Sny Slough is a prestressed concrete continuous stringer/multi-beam or girder carrying I-72/US 36 (wb) over The Sny Slough in Pike County, Illinois. It was built in 1998, so it is 27 years old, younger 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 6 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 7,250 vehicles a day, roughly 26% of them trucks, projected to reach 8,758 by 2046. The structure is 200 ft (61 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-72/US 36 (wb)
CrossesThe Sny Slough
Location2M SW I-172
RouteInterstate 72
CountyPike County
StateIllinois
Coordinates39.73443, -91.31614
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.3 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length200 ft (61 m)
Longest span99 ft (30.1 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,250 (2023)
Projected traffic8,758 by 2046
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 I-72/US 36 (wb) over The Sny Slough built?

It was built in 1998, making it 27 years old in 2025.

What condition is I-72/US 36 (wb) over The Sny Slough 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 September 2023.

How much traffic does I-72/US 36 (wb) over The Sny Slough carry?

About 7,250 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I-72/US 36 (wb) over The Sny Slough?

The structure is 200 ft (61 m) long with a longest span of 99 ft (30.1 m) and a deck 43 ft wide.

Who owns I-72/US 36 (wb) over The Sny Slough?

It is owned by the State Highway Agency.