US Bridges

I-88 WB over 3 Mile Branch

Fair

Lee County, Illinois · 2.3 MI W JCT Ill 26 · Structure no. 052991600000000

Built
1974
51 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
93 ft
2 main spans
Daily traffic
7,850
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-88 WB over 3 Mile Branch is a prestressed concrete continuous stringer/multi-beam or girder carrying I-88 WB over 3 Mile Branch in Lee County, Illinois. It was built in 1974, so it is 51 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 6 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 7,850 vehicles a day, roughly 30% of them trucks, projected to reach 6,161 by 2046. The structure is 93 ft (28.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-88 WB
Crosses3 Mile Branch
Location2.3 MI W JCT Ill 26
RouteInterstate 88
Coordinates41.80035, -89.51132
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating59 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span44 ft (13.4 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,850 (2023)
Projected traffic6,161 by 2046
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 I-88 WB over 3 Mile Branch built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-88 WB over 3 Mile Branch 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 2024.

How much traffic does I-88 WB over 3 Mile Branch carry?

About 7,850 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I-88 WB over 3 Mile Branch?

The structure is 93 ft (28.3 m) long with a longest span of 44 ft (13.4 m) and a deck 43 ft wide.

Who owns I-88 WB over 3 Mile Branch?

It is owned by the State Toll Authority.