US Bridges

Garden Prairie RD over Spring Creek

Fair

Boone County, Illinois · 3.5 MI S Garden Prai · Structure no. 004500200000000

Built
1958
67 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
175
2023 count
Owner
County
County Highway Agency

About this bridge

Garden Prairie RD over Spring Creek is a concrete culvert carrying Garden Prairie RD over Spring Creek in Boone County, Illinois. It was built in 1958, so it is 67 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 175 vehicles a day, roughly 44% of them trucks, projected to reach 130 by 2046. The structure is 26 ft (8 m) long. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesGarden Prairie RD
CrossesSpring Creek
Location3.5 MI S Garden Prai
RouteCounty Highway 0
CountyBoone County
StateIllinois
Coordinates42.20989, -88.71867
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length26 ft (8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2023)
Projected traffic130 by 2046
Trucks44%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Garden Prairie RD over Spring Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Garden Prairie RD over Spring Creek 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 March 2024.

How much traffic does Garden Prairie RD over Spring Creek carry?

About 175 vehicles per day (2023 count), of which roughly 44% are trucks.

How long is Garden Prairie RD over Spring Creek?

The structure is 26 ft (8 m) long with a longest span of 12 ft (3.7 m).

Who owns Garden Prairie RD over Spring Creek?

It is owned by the County Highway Agency.