US Bridges

Ill 100 over Elsah Creek

Poor

Jersey County, Illinois · At Elsah · Structure no. 042001400000000

Built
1961
64 years old, rebuilt 1995
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
101 ft
3 main spans
Daily traffic
4,150
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 100 over Elsah Creek is a steel continuous stringer/multi-beam or girder carrying Ill 100 over Elsah Creek in Jersey County, Illinois. It was built in 1961 and reconstructed in 1995, so it is 64 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,150 vehicles a day, roughly 2% of them trucks, projected to reach 4,192 by 2046. The structure is 101 ft (30.8 m) long and 73 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesIll 100
CrossesElsah Creek
LocationAt Elsah
RouteState Highway 100
Coordinates38.95111, -90.36241
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating61.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span33 ft (10 m)
Deck width73 ft (22.3 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,150 (2023)
Projected traffic4,192 by 2046
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 over Elsah Creek built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1995.

What condition is Ill 100 over Elsah Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Ill 100 over Elsah Creek carry?

About 4,150 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Ill 100 over Elsah Creek?

The structure is 101 ft (30.8 m) long with a longest span of 33 ft (10 m) and a deck 73 ft wide.

Who owns Ill 100 over Elsah Creek?

It is owned by the State Highway Agency.