US Bridges

Ill 100 & 106 over Little Blue Creek

Fair

Pike County, Illinois · W Edge Florence · Structure no. 075200700000000

Built
1954
71 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
1,300
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 100 & 106 over Little Blue Creek is a concrete culvert carrying Ill 100 & 106 over Little Blue Creek in Pike County, Illinois. It was built in 1954, so it is 71 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 1,300 vehicles a day, roughly 26% of them trucks, projected to reach 1,972 by 2046. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 19.9 mi (32 km).

CarriesIll 100 & 106
CrossesLittle Blue Creek
LocationW Edge Florence
RouteState Highway 100
Coordinates39.63242, -90.61376
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length32 ft (9.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2023)
Projected traffic1,972 by 2046
Trucks26%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 100 & 106 over Little Blue Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is Ill 100 & 106 over Little Blue 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 January 2024.

How much traffic does Ill 100 & 106 over Little Blue Creek carry?

About 1,300 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is Ill 100 & 106 over Little Blue Creek?

The structure is 32 ft (9.8 m) long with a longest span of 14 ft (4.3 m).

Who owns Ill 100 & 106 over Little Blue Creek?

It is owned by the State Highway Agency.