US Bridges

Union ST over Gum CR

Poor

LaSalle County, Illinois · Union ST Ov Gum CR · Structure no. 050690800000000

Built
1920
105 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
125
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Union ST over Gum CR is a steel stringer/multi-beam or girder carrying Union ST over Gum CR in LaSalle County, Illinois. It was built in 1920, so it is 105 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 125 vehicles a day, roughly 14% of them trucks, projected to reach 126 by 2046. The structure is 31 ft (9.4 m) long and 30 ft wide.

Location

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CarriesUnion ST
CrossesGum CR
LocationUnion ST Ov Gum CR
RouteCity Street 0
CountyLaSalle County
StateIllinois
Coordinates41.32721, -88.69432
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating21.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span18 ft (5.5 m)
Deck width30 ft (9 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2020)
Projected traffic126 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$146,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Union ST over Gum CR built?

It was built in 1920, making it 105 years old in 2025.

What condition is Union ST over Gum CR 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 Union ST over Gum CR carry?

About 125 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is Union ST over Gum CR?

The structure is 31 ft (9.4 m) long with a longest span of 18 ft (5.5 m) and a deck 30 ft wide.

Who owns Union ST over Gum CR?

It is owned by the City or Municipal Highway Agency.