US Bridges

Ill 37 over Cache River

Poor

Pulaski County, Illinois · At Johnson CO Line · Structure no. 077002000000000

Built
1957
68 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
133 ft
3 main spans
Daily traffic
1,350
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 37 over Cache River is a steel continuous stringer/multi-beam or girder carrying Ill 37 over Cache River in Pulaski County, Illinois. It was built in 1957, so it is 68 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 1,350 vehicles a day, roughly 19% of them trucks, projected to reach 1,566 by 2046. The structure is 133 ft (40.5 m) long and 36 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesIll 37
CrossesCache River
LocationAt Johnson CO Line
RouteState Highway 37
Coordinates37.30669, -89.0216
Functional classRural Minor Arterial

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.
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 inspectionJuly 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating38.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span47 ft (14.3 m)
Deck width36 ft (11.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2023)
Projected traffic1,566 by 2046
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 37 over Cache River built?

It was built in 1957, making it 68 years old in 2025.

What condition is Ill 37 over Cache River 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 July 2024.

How much traffic does Ill 37 over Cache River carry?

About 1,350 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is Ill 37 over Cache River?

The structure is 133 ft (40.5 m) long with a longest span of 47 ft (14.3 m) and a deck 36 ft wide.

Who owns Ill 37 over Cache River?

It is owned by the State Highway Agency.