US Bridges

Ill 1 over Stream

Fair

Gallatin County, Illinois · 4 Mi. S of Ill 13 · Structure no. 030200100000000

Built
1935
90 years old, rebuilt 1979
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
1,850
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 1 over Stream is a concrete continuous culvert carrying Ill 1 over Stream in Gallatin County, Illinois. It was built in 1935 and reconstructed in 1979, so it is 90 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 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 1,850 vehicles a day, roughly 26% of them trucks, projected to reach 1,818 by 2046. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 54.1 mi (87 km).

Location

Open in Google Maps
CarriesIll 1
CrossesStream
Location4 Mi. S of Ill 13
RouteState Highway 1
CountyGallatin County
StateIllinois
Coordinates37.68659, -88.28383
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating44.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,850 (2023)
Projected traffic1,818 by 2046
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed54.1 mi (87 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$68,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 1 over Stream built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1979.

What condition is Ill 1 over Stream 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 January 2024.

How much traffic does Ill 1 over Stream carry?

About 1,850 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is Ill 1 over Stream?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.1 m).

Who owns Ill 1 over Stream?

It is owned by the State Highway Agency.