US Bridges

Local RD over Black Hawk Creek

Good

Grundy County, Iowa · 088161402 · Structure no. 000000000164862

Built
2007
18 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
115 ft
3 main spans
Daily traffic
29
2022 count
Owner
County
County Highway Agency

About this bridge

Local RD over Black Hawk Creek is a concrete continuous slab carrying Local RD over Black Hawk Creek in Grundy County, Iowa. It was built in 2007, so it is 18 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 29 vehicles a day, projected to reach 29 by 2044. The structure is 115 ft (35.1 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLocal RD
CrossesBlack Hawk Creek
Location088161402
RouteCounty Highway 0
StateIowa
Coordinates42.42937, -92.6907
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 protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.9 US tons
Inventory rating55.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span44 ft (13.4 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (2022)
Projected traffic29 by 2044
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local RD over Black Hawk Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Local RD 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 2024.

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

About 29 vehicles per day (2022 count).

How long is Local RD over Black Hawk Creek?

The structure is 115 ft (35.1 m) long with a longest span of 44 ft (13.4 m) and a deck 33 ft wide.

Who owns Local RD over Black Hawk Creek?

It is owned by the County Highway Agency.