US Bridges

Clay ST over Drainage

Fair

Black Hawk County, Iowa · 000000000 · Structure no. 000000000001160

Built
1957
68 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
320
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Clay ST over Drainage is a concrete continuous slab carrying Clay ST over Drainage in Black Hawk County, Iowa. It was built in 1957, so it is 68 years old, older 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 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 320 vehicles a day, projected to reach 320 by 2044. The structure is 23 ft (7 m) long and 63 ft wide.

Location

Open in Google Maps
CarriesClay ST
CrossesDrainage
Location000000000
RouteCity Street 0
CountyBlack Hawk County
StateIowa
Coordinates42.51986, -92.44818
Functional classUrban Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.9 US tons
Inventory rating22 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width63 ft (19.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic320 (2022)
Projected traffic320 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Clay ST over Drainage built?

It was built in 1957, making it 68 years old in 2025.

What condition is Clay ST over Drainage 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 March 2024.

How much traffic does Clay ST over Drainage carry?

About 320 vehicles per day (2022 count).

How long is Clay ST over Drainage?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 63 ft wide.

Who owns Clay ST over Drainage?

It is owned by the City or Municipal Highway Agency.