US Bridges

FAU 6938 (ch 20) over Spring CR

Fair

McDonough County, Illinois · NW-22-T6NR3W · Structure no. 055305300000000

Built
1983
42 years old
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
118 ft
2 main spans
Daily traffic
450
2024 count
Owner
County
County Highway Agency

About this bridge

FAU 6938 (ch 20) over Spring CR is a prestressed concrete box beam or girders - multiple carrying FAU 6938 (ch 20) over Spring CR in McDonough County, Illinois. It was built in 1983, so it is 42 years old, younger 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 6% of them trucks, projected to reach 328 by 2046. The structure is 118 ft (36 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesFAU 6938 (ch 20)
CrossesSpring CR
LocationNW-22-T6NR3W
RouteCounty Highway 0
CountyMcDonough County
StateIllinois
Coordinates40.50034, -90.7262
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length118 ft (36 m)
Longest span75 ft (22.9 m)
Deck width31 ft (9.5 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2024)
Projected traffic328 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
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 FAU 6938 (ch 20) over Spring CR built?

It was built in 1983, making it 42 years old in 2025.

What condition is FAU 6938 (ch 20) over Spring CR 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 2023.

How much traffic does FAU 6938 (ch 20) over Spring CR carry?

About 450 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is FAU 6938 (ch 20) over Spring CR?

The structure is 118 ft (36 m) long with a longest span of 75 ft (22.9 m) and a deck 31 ft wide.

Who owns FAU 6938 (ch 20) over Spring CR?

It is owned by the County Highway Agency.