US Bridges

Perryville Road over S Br Kishwaukee Riv.

Good

Winnebago County, Illinois · 0.3 MI N Blackhawk · Structure no. 101306400000000

Built
1971
54 years old, rebuilt 2010
Condition
Good
inspected March 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
157 ft
3 main spans
Daily traffic
3,200
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Perryville Road over S Br Kishwaukee Riv. is a steel continuous stringer/multi-beam or girder carrying Perryville Road over S Br Kishwaukee Riv. in Winnebago County, Illinois. It was built in 1971 and reconstructed in 2010, so it is 54 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,200 vehicles a day, roughly 8% of them trucks, projected to reach 3,636 by 2046. The structure is 157 ft (48 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesPerryville Road
CrossesS Br Kishwaukee Riv.
Location0.3 MI N Blackhawk
CountyWinnebago County
StateIllinois
Coordinates42.20029, -88.97986
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.6 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length157 ft (48 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2022)
Projected traffic3,636 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Perryville Road over S Br Kishwaukee Riv. built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2010.

What condition is Perryville Road over S Br Kishwaukee Riv. in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2021.

How much traffic does Perryville Road over S Br Kishwaukee Riv. carry?

About 3,200 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Perryville Road over S Br Kishwaukee Riv.?

The structure is 157 ft (48 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns Perryville Road over S Br Kishwaukee Riv.?

It is owned by the Town or Township Highway Agency.