US Bridges

7th ST over Cedar River

Good

Black Hawk County, Iowa · Janesville · Structure no. 000000000015491

Built
2023
2 years old
Condition
Good
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
501 ft
5 main spans
Daily traffic
1,531
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

7th ST over Cedar River is a concrete continuous tee beam carrying 7th ST over Cedar River in Black Hawk County, Iowa. It was built in 2023, so it is 2 years old, younger than the Iowa average of 45.5 years.

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

It carries about 1,531 vehicles a day, projected to reach 1,531 by 2044. The structure is 501 ft (152.7 m) long and 40 ft wide.

Location

Open in Google Maps
Carries7th ST
CrossesCedar River
LocationJanesville
RouteCity Street 0
CountyBlack Hawk County
StateIowa
Coordinates42.64226, -92.46599
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating62.5 US tons
Inventory rating44.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length501 ft (152.7 m)
Longest span102 ft (31.1 m)
Deck width40 ft (12.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,531 (2022)
Projected traffic1,531 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 7th ST over Cedar River built?

It was built in 2023, making it 2 years old in 2025.

What condition is 7th ST over Cedar River 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 February 2024.

How much traffic does 7th ST over Cedar River carry?

About 1,531 vehicles per day (2022 count).

How long is 7th ST over Cedar River?

The structure is 501 ft (152.7 m) long with a longest span of 102 ft (31.1 m) and a deck 40 ft wide.

Who owns 7th ST over Cedar River?

It is owned by the City or Municipal Highway Agency.