US Bridges

Ill 106 over Bluff Creek

Fair

Scott County, Illinois · 2 MI W Winchester · Structure no. 086000200000000

Built
1953
72 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete Continuous
Length
86 ft
2 main spans
Daily traffic
1,800
2021 count
Owner
State
State Highway Agency

About this bridge

Ill 106 over Bluff Creek is a concrete continuous tee beam carrying Ill 106 over Bluff Creek in Scott County, Illinois. It was built in 1953, so it is 72 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 1,800 vehicles a day, roughly 16% of them trucks, projected to reach 1,818 by 2046. The structure is 86 ft (26.3 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesIll 106
CrossesBluff Creek
Location2 MI W Winchester
RouteState Highway 106
CountyScott County
StateIllinois
Coordinates39.63228, -90.51431
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating47.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length86 ft (26.3 m)
Longest span40 ft (12.2 m)
Deck width36 ft (11.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2021)
Projected traffic1,818 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 106 over Bluff Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is Ill 106 over Bluff Creek 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 April 2024.

How much traffic does Ill 106 over Bluff Creek carry?

About 1,800 vehicles per day (2021 count), of which roughly 16% are trucks.

How long is Ill 106 over Bluff Creek?

The structure is 86 ft (26.3 m) long with a longest span of 40 ft (12.2 m) and a deck 36 ft wide.

Who owns Ill 106 over Bluff Creek?

It is owned by the State Highway Agency.