US Bridges

Blackhawk Ave over Br Clear CR

Good

Johnson County, Iowa · 080082003 · Structure no. 000000000205151

Built
2021
4 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete Continuous
Length
70 ft
3 main spans
Daily traffic
275
2021 count
Owner
County
County Highway Agency

About this bridge

Blackhawk Ave over Br Clear CR is a concrete continuous slab carrying Blackhawk Ave over Br Clear CR in Johnson County, Iowa. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 275 vehicles a day, projected to reach 275 by 2043. The structure is 70 ft (21.3 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesBlackhawk Ave
CrossesBr Clear CR
Location080082003
RouteCounty Highway 0
CountyJohnson County
StateIowa
Coordinates41.7267, -91.80072
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length70 ft (21.3 m)
Longest span28 ft (8.5 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2021)
Projected traffic275 by 2043
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Blackhawk Ave over Br Clear CR built?

It was built in 2021, making it 4 years old in 2025.

What condition is Blackhawk Ave over Br Clear CR 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 Blackhawk Ave over Br Clear CR carry?

About 275 vehicles per day (2021 count).

How long is Blackhawk Ave over Br Clear CR?

The structure is 70 ft (21.3 m) long with a longest span of 28 ft (8.5 m) and a deck 33 ft wide.

Who owns Blackhawk Ave over Br Clear CR?

It is owned by the County Highway Agency.