US Bridges

Westfield Ave over Black Hawk Creek

Fair

Black Hawk County, Iowa · City Bridge No. 11 · Structure no. 000000000011880

Built
1961
64 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
270 ft
4 main spans
Daily traffic
1,296
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Westfield Ave over Black Hawk Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Westfield Ave over Black Hawk Creek in Black Hawk County, Iowa. It was built in 1961, so it is 64 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 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 1,296 vehicles a day, projected to reach 1,296 by 2043. The structure is 270 ft (82.3 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWestfield Ave
CrossesBlack Hawk Creek
LocationCity Bridge No. 11
RouteCity Street 0
CountyBlack Hawk County
StateIowa
Coordinates42.49968, -92.35833
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating86.2 US tons
Inventory rating33.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length270 ft (82.3 m)
Longest span68 ft (20.7 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,296 (2022)
Projected traffic1,296 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Westfield Ave over Black Hawk Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Westfield Ave over Black Hawk Creek 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 Westfield Ave over Black Hawk Creek carry?

About 1,296 vehicles per day (2022 count).

How long is Westfield Ave over Black Hawk Creek?

The structure is 270 ft (82.3 m) long with a longest span of 68 ft (20.7 m) and a deck 38 ft wide.

Who owns Westfield Ave over Black Hawk Creek?

It is owned by the City or Municipal Highway Agency.