US Bridges

Ill 18 over Sandy CR Overflow

Fair

Marshall County, Illinois · 0.3 E. of Rt 26 · Structure no. 062200400000000

Built
1975
50 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
2,950
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 18 over Sandy CR Overflow is a concrete continuous culvert carrying Ill 18 over Sandy CR Overflow in Marshall County, Illinois. It was built in 1975, so it is 50 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 2,950 vehicles a day, roughly 10% of them trucks, projected to reach 3,283 by 2046. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIll 18
CrossesSandy CR Overflow
Location0.3 E. of Rt 26
RouteState Highway 18
CountyMarshall County
StateIllinois
Coordinates41.10066, -89.33629
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,950 (2023)
Projected traffic3,283 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 18 over Sandy CR Overflow built?

It was built in 1975, making it 50 years old in 2025.

What condition is Ill 18 over Sandy CR Overflow 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 March 2023.

How much traffic does Ill 18 over Sandy CR Overflow carry?

About 2,950 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ill 18 over Sandy CR Overflow?

The structure is 25 ft (7.6 m) long with a longest span of 13 ft (4 m).

Who owns Ill 18 over Sandy CR Overflow?

It is owned by the State Highway Agency.