US Bridges

Harlmem Rd/Bauer P over Rock River

Fair

Winnebago County, Illinois · 0.65MI W Il 251 · Structure no. 101308800000000

Built
1993
32 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
992 ft
7 main spans
Daily traffic
12,000
2022 count
Owner
County
County Highway Agency

About this bridge

Harlmem Rd/Bauer P over Rock River is a steel continuous stringer/multi-beam or girder carrying Harlmem Rd/Bauer P over Rock River in Winnebago County, Illinois. It was built in 1993, so it is 32 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 5 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 12,000 vehicles a day, roughly 5% of them trucks, projected to reach 4,949 by 2046. The structure is 992 ft (302.4 m) long and 70 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesHarlmem Rd/Bauer P
CrossesRock River
Location0.65MI W Il 251
CountyWinnebago County
StateIllinois
Coordinates42.33819, -89.06693
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length992 ft (302.4 m)
Longest span164 ft (50 m)
Deck width70 ft (21.2 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2022)
Projected traffic4,949 by 2046
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Harlmem Rd/Bauer P over Rock River built?

It was built in 1993, making it 32 years old in 2025.

What condition is Harlmem Rd/Bauer P over Rock 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 September 2024.

How much traffic does Harlmem Rd/Bauer P over Rock River carry?

About 12,000 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Harlmem Rd/Bauer P over Rock River?

The structure is 992 ft (302.4 m) long with a longest span of 164 ft (50 m) and a deck 70 ft wide.

Who owns Harlmem Rd/Bauer P over Rock River?

It is owned by the County Highway Agency.