US Bridges

Blackhawk RD over Kishwaukee River

Fair

Winnebago County, Illinois · S. of Rockford · Structure no. 101308700000000

Built
1996
29 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
363 ft
4 main spans
Daily traffic
3,450
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Blackhawk RD over Kishwaukee River is a prestressed concrete stringer/multi-beam or girder carrying Blackhawk RD over Kishwaukee River in Winnebago County, Illinois. It was built in 1996, so it is 29 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 3,450 vehicles a day, roughly 8% of them trucks, projected to reach 3,586 by 2046. The structure is 363 ft (110.6 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBlackhawk RD
CrossesKishwaukee River
LocationS. of Rockford
CountyWinnebago County
StateIllinois
Coordinates42.19474, -89.00016
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length363 ft (110.6 m)
Longest span95 ft (29 m)
Deck width56 ft (17 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,450 (2022)
Projected traffic3,586 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackhawk RD over Kishwaukee River built?

It was built in 1996, making it 29 years old in 2025.

What condition is Blackhawk RD over Kishwaukee River 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 June 2024.

How much traffic does Blackhawk RD over Kishwaukee River carry?

About 3,450 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Blackhawk RD over Kishwaukee River?

The structure is 363 ft (110.6 m) long with a longest span of 95 ft (29 m) and a deck 56 ft wide.

Who owns Blackhawk RD over Kishwaukee River?

It is owned by the City or Municipal Highway Agency.