US Bridges

6th St. over Cedar River

Fair

Black Hawk County, Iowa · City Bridge No. 43 · Structure no. 000000000503855

Built
1984
41 years old
Condition
Fair
inspected June 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
703 ft
7 main spans
Daily traffic
5,195
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

6th St. over Cedar River is a steel continuous girder and floorbeam system carrying 6th St. over Cedar River in Black Hawk County, Iowa. It was built in 1984, so it is 41 years old, younger than the Iowa average of 45.5 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 5,195 vehicles a day, projected to reach 5,195 by 2043. The structure is 703 ft (214.3 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries6th St.
CrossesCedar River
LocationCity Bridge No. 43
RouteCity Street 0
CountyBlack Hawk County
StateIowa
Coordinates42.49442, -92.3368
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating86.2 US tons
Inventory rating51.7 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length703 ft (214.3 m)
Longest span97 ft (29.6 m)
Deck width62 ft (18.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,195 (2022)
Projected traffic5,195 by 2043
Trucks0%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 6th St. over Cedar River built?

It was built in 1984, making it 41 years old in 2025.

What condition is 6th St. over Cedar 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 2023.

How much traffic does 6th St. over Cedar River carry?

About 5,195 vehicles per day (2022 count).

How long is 6th St. over Cedar River?

The structure is 703 ft (214.3 m) long with a longest span of 97 ft (29.6 m) and a deck 62 ft wide.

Who owns 6th St. over Cedar River?

It is owned by the City or Municipal Highway Agency.