US Bridges

Ill 94 over Henderson Overflow

Fair

Henderson County, Illinois · 1 MI S Bald Bluff · Structure no. 036002200000000

Built
1934
91 years old, rebuilt 1991
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
103 ft
2 main spans
Daily traffic
275
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 94 over Henderson Overflow is a steel continuous stringer/multi-beam or girder carrying Ill 94 over Henderson Overflow in Henderson County, Illinois. It was built in 1934 and reconstructed in 1991, so it is 91 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 275 vehicles a day, roughly 16% of them trucks, projected to reach 354 by 2046. The structure is 103 ft (31.5 m) long and 35 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesIll 94
CrossesHenderson Overflow
Location1 MI S Bald Bluff
RouteState Highway 94
Coordinates41.00666, -90.85352
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating60.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length103 ft (31.5 m)
Longest span49 ft (15 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2023)
Projected traffic354 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 94 over Henderson Overflow built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1991.

What condition is Ill 94 over Henderson Overflow 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 October 2024.

How much traffic does Ill 94 over Henderson Overflow carry?

About 275 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Ill 94 over Henderson Overflow?

The structure is 103 ft (31.5 m) long with a longest span of 49 ft (15 m) and a deck 35 ft wide.

Who owns Ill 94 over Henderson Overflow?

It is owned by the State Highway Agency.