US Bridges

Ia 58 over Black Hawk Creek

Good

Black Hawk County, Iowa · 1.0 Mi. N of Jct. U.S. 63 · Structure no. 000000000015031

Built
1995
30 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
262 ft
3 main spans
Daily traffic
5,200
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 58 over Black Hawk Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 58 over Black Hawk Creek in Black Hawk County, Iowa. It was built in 1995, so it is 30 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,200 vehicles a day, roughly 6% of them trucks, projected to reach 5,200 by 2042. The structure is 262 ft (79.9 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesIa 58
CrossesBlack Hawk Creek
Location1.0 Mi. N of Jct. U.S. 63
RouteState Highway 58
StateIowa
Coordinates42.40713, -92.46309
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating75 US tons
Inventory rating45 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length262 ft (79.9 m)
Longest span96 ft (29.3 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,200 (2022)
Projected traffic5,200 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Ia 58 over Black Hawk Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Ia 58 over Black Hawk Creek 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 April 2023.

How much traffic does Ia 58 over Black Hawk Creek carry?

About 5,200 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Ia 58 over Black Hawk Creek?

The structure is 262 ft (79.9 m) long with a longest span of 96 ft (29.3 m) and a deck 47 ft wide.

Who owns Ia 58 over Black Hawk Creek?

It is owned by the State Highway Agency.