US Bridges

Staunton Connector over FAI 55

Fair

Macoupin County, Illinois · I-55 Int @ Staunton · Structure no. 059004500000000

Built
1975
50 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
252 ft
2 main spans
Daily traffic
4,050
2021 count
Owner
State
State Highway Agency

About this bridge

Staunton Connector over FAI 55 is a steel continuous stringer/multi-beam or girder carrying Staunton Connector over FAI 55 in Macoupin County, Illinois. It was built in 1975, so it is 50 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 4,050 vehicles a day, roughly 13% of them trucks, projected to reach 4,091 by 2046. The structure is 252 ft (76.8 m) long and 68 ft wide.

Location

Open in Google Maps
CarriesStaunton Connector
CrossesFAI 55
LocationI-55 Int @ Staunton
CountyMacoupin County
StateIllinois
Coordinates39.02088, -89.75006
Functional classRural Minor Arterial

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length252 ft (76.8 m)
Longest span109 ft (33.2 m)
Deck width68 ft (20.7 m)
Roadway width65 ft (19.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,050 (2021)
Projected traffic4,091 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 Staunton Connector over FAI 55 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Staunton Connector over FAI 55 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 June 2023.

How much traffic does Staunton Connector over FAI 55 carry?

About 4,050 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Staunton Connector over FAI 55?

The structure is 252 ft (76.8 m) long with a longest span of 109 ft (33.2 m) and a deck 68 ft wide.

Who owns Staunton Connector over FAI 55?

It is owned by the State Highway Agency.