US Bridges

Grundy RD over Trib to Black Hawk Creek

Good

Black Hawk County, Iowa · 88-14-07-06-10 · Structure no. 000000000075331

Built
1982
43 years old
Condition
Good
inspected March 2022
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
196
2022 count
Owner
County
County Highway Agency

About this bridge

Grundy RD over Trib to Black Hawk Creek is a concrete continuous culvert carrying Grundy RD over Trib to Black Hawk Creek in Black Hawk County, Iowa. It was built in 1982, so it is 43 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 196 vehicles a day, projected to reach 196 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesGrundy RD
CrossesTrib to Black Hawk Creek
Location88-14-07-06-10
RouteCounty Highway 0
StateIowa
Coordinates42.44452, -92.53397
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.2 US tons
Inventory rating41.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic196 (2022)
Projected traffic196 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Grundy RD over Trib to Black Hawk Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Grundy RD over Trib to 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 March 2022.

How much traffic does Grundy RD over Trib to Black Hawk Creek carry?

About 196 vehicles per day (2022 count).

How long is Grundy RD over Trib to Black Hawk Creek?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns Grundy RD over Trib to Black Hawk Creek?

It is owned by the County Highway Agency.