US Bridges

Perry RD over Afton Lateral

Fair

DeKalb County, Illinois · 1500N 660E · Structure no. 019300500000000

Built
1950
75 years old, rebuilt 1979
Condition
Fair
inspected January 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
1,800
2021 count
Owner
County
County Highway Agency

About this bridge

Perry RD over Afton Lateral is a concrete slab carrying Perry RD over Afton Lateral in DeKalb County, Illinois. It was built in 1950 and reconstructed in 1979, so it is 75 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 1,800 vehicles a day, roughly 8% of them trucks, projected to reach 2,016 by 2046. The structure is 24 ft (7.4 m) long and 35 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesPerry RD
CrossesAfton Lateral
Location1500N 660E
RouteCounty Highway 0
CountyDeKalb County
StateIllinois
Coordinates41.84882, -88.81663
Functional classRural Major 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating48.6 US tons
Inventory rating29.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.4 m)
Longest span22 ft (6.7 m)
Deck width35 ft (10.8 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2021)
Projected traffic2,016 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Perry RD over Afton Lateral built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1979.

What condition is Perry RD over Afton Lateral 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 January 2024.

How much traffic does Perry RD over Afton Lateral carry?

About 1,800 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Perry RD over Afton Lateral?

The structure is 24 ft (7.4 m) long with a longest span of 22 ft (6.7 m) and a deck 35 ft wide.

Who owns Perry RD over Afton Lateral?

It is owned by the County Highway Agency.