US Bridges

Ill 106 over Bay Creek

Fair

Pike County, Illinois · 1.4 MI E Pittsfield · Structure no. 075001100000000

Built
1948
77 years old, rebuilt 1999
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
149 ft
3 main spans
Daily traffic
1,950
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 106 over Bay Creek is a steel continuous stringer/multi-beam or girder carrying Ill 106 over Bay Creek in Pike County, Illinois. It was built in 1948 and reconstructed in 1999, so it is 77 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 1,950 vehicles a day, roughly 10% of them trucks, projected to reach 3,190 by 2046. The structure is 149 ft (45.3 m) long and 36 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesIll 106
CrossesBay Creek
Location1.4 MI E Pittsfield
RouteState Highway 106
CountyPike County
StateIllinois
Coordinates39.6084, -90.75908
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
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 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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.2 US tons
Inventory rating55.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length149 ft (45.3 m)
Longest span56 ft (17.1 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,950 (2023)
Projected traffic3,190 by 2046
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$879,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 106 over Bay Creek built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1999.

What condition is Ill 106 over Bay 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 July 2023.

How much traffic does Ill 106 over Bay Creek carry?

About 1,950 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ill 106 over Bay Creek?

The structure is 149 ft (45.3 m) long with a longest span of 56 ft (17.1 m) and a deck 36 ft wide.

Who owns Ill 106 over Bay Creek?

It is owned by the State Highway Agency.