US Bridges

Zaneta RD over Black Hawk Creek

Fair

Black Hawk County, Iowa · 88-14-33-03 · Structure no. 000000000075440

Built
1942
83 years old, rebuilt 1986
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
240 ft
3 main spans
Daily traffic
982
2022 count
Owner
County
County Highway Agency

About this bridge

Zaneta RD over Black Hawk Creek is a steel continuous stringer/multi-beam or girder carrying Zaneta RD over Black Hawk Creek in Black Hawk County, Iowa. It was built in 1942 and reconstructed in 1986, so it is 83 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 982 vehicles a day, roughly 15% of them trucks, projected to reach 982 by 2044. The structure is 240 ft (73.2 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesZaneta RD
CrossesBlack Hawk Creek
Location88-14-33-03
RouteCounty Highway 0
StateIowa
Coordinates42.39186, -92.48954
Functional classRural Major 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating33.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span94 ft (28.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic982 (2022)
Projected traffic982 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Zaneta RD over Black Hawk Creek built?

It was built in 1942, making it 83 years old in 2025. It was reconstructed in 1986.

What condition is Zaneta RD 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 November 2024.

How much traffic does Zaneta RD over Black Hawk Creek carry?

About 982 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Zaneta RD over Black Hawk Creek?

The structure is 240 ft (73.2 m) long with a longest span of 94 ft (28.7 m) and a deck 34 ft wide.

Who owns Zaneta RD over Black Hawk Creek?

It is owned by the County Highway Agency.