US Bridges

Ch 25 over I-88

Fair

Rock Island County, Illinois · 5.MI. Sw. Hillsdale · Structure no. 081012600000000

Built
1976
49 years old, rebuilt 2022
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
248 ft
2 main spans
Daily traffic
450
2020 count
Owner
State
State Highway Agency

About this bridge

Ch 25 over I-88 is a steel continuous stringer/multi-beam or girder carrying Ch 25 over I-88 in Rock Island County, Illinois. It was built in 1976 and reconstructed in 2022, so it is 49 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 450 vehicles a day, roughly 12% of them trucks, projected to reach 455 by 2046. The structure is 248 ft (75.6 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCh 25
CrossesI-88
Location5.MI. Sw. Hillsdale
RouteCounty Highway 0
CountyRock Island County
StateIllinois
Coordinates41.57056, -90.22331
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating33.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 15
Structure length248 ft (75.6 m)
Longest span99 ft (30.2 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2020)
Projected traffic455 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ch 25 over I-88 built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 2022.

What condition is Ch 25 over I-88 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 Ch 25 over I-88 carry?

About 450 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is Ch 25 over I-88?

The structure is 248 ft (75.6 m) long with a longest span of 99 ft (30.2 m) and a deck 32 ft wide.

Who owns Ch 25 over I-88?

It is owned by the State Highway Agency.