US Bridges

Ill 17 over Intermittent Stream

PoorPosted for load

Marshall County, Illinois · 1.4 MI W of Ill 89 · Structure no. 062200300000000

Built
1971
54 years old
Condition
Poor
inspected March 2024
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
1,150
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 17 over Intermittent Stream is a concrete continuous culvert carrying Ill 17 over Intermittent Stream in Marshall County, Illinois. It was built in 1971, so it is 54 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. Its operating status is: posted for load restriction.

It carries about 1,150 vehicles a day, roughly 17% of them trucks, projected to reach 3,119 by 2032. The structure is 30 ft (9.1 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIll 17
CrossesIntermittent Stream
Location1.4 MI W of Ill 89
RouteState Highway 17
CountyMarshall County
StateIllinois
Coordinates41.02756, -89.25766
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.7 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span15 ft (4.5 m)
Deck width40 ft (12.3 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,150 (2023)
Projected traffic3,119 by 2032
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 17 over Intermittent Stream built?

It was built in 1971, making it 54 years old in 2025.

What condition is Ill 17 over Intermittent Stream 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 March 2024.

How much traffic does Ill 17 over Intermittent Stream carry?

About 1,150 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is Ill 17 over Intermittent Stream?

The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.5 m) and a deck 40 ft wide.

Who owns Ill 17 over Intermittent Stream?

It is owned by the State Highway Agency.