US Bridges

27th ST Sb-Moline over FAI 74

Fair

Rock Island County, Illinois · .5 MI S 23rd Ave · Structure no. 081010700000000

Built
1971
54 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
251 ft
2 main spans
Daily traffic
1,375
2020 count
Owner
State
State Highway Agency

About this bridge

27th ST Sb-Moline over FAI 74 is a steel continuous stringer/multi-beam or girder carrying 27th ST Sb-Moline over FAI 74 in Rock Island County, Illinois. It was built in 1971, so it is 54 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 1,375 vehicles a day, roughly 3% of them trucks, projected to reach 1,389 by 2046. The structure is 251 ft (76.5 m) long and 33 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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Carries27th ST Sb-Moline
CrossesFAI 74
Location.5 MI S 23rd Ave
CountyRock Island County
StateIllinois
Coordinates41.48568, -90.49972
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length251 ft (76.5 m)
Longest span85 ft (26 m)
Deck width33 ft (10 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,375 (2020)
Projected traffic1,389 by 2046
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was 27th ST Sb-Moline over FAI 74 built?

It was built in 1971, making it 54 years old in 2025.

What condition is 27th ST Sb-Moline over FAI 74 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 December 2024.

How much traffic does 27th ST Sb-Moline over FAI 74 carry?

About 1,375 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is 27th ST Sb-Moline over FAI 74?

The structure is 251 ft (76.5 m) long with a longest span of 85 ft (26 m) and a deck 33 ft wide.

Who owns 27th ST Sb-Moline over FAI 74?

It is owned by the State Highway Agency.