Local over Dd

Good

Hardin County, Iowa · 089220902 · Structure no. 000000000176751

Built: 2005; 20 years old
Condition: Good; inspected February 2023
Type: Tee Beam; Prestressed Concrete
Length: 55 ft; 1 main span
Daily traffic: 82; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Dd is a prestressed concrete tee beam carrying Local over Dd in Hardin County, Iowa. It was built in 2005, so it is 20 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 82 vehicles a day, projected to reach 82 by 2043. The structure is 55 ft (16.8 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps

CarriesLocal

CrossesDd

Location089220902

RouteCounty Highway 0

CountyHardin County

StateIowa

Coordinates42.53459, -93.45998

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.

Component	Rating	Meaning
Deck	8 Very Good	No problems noted.
Superstructure	8 Very Good	No problems noted.
Substructure	8 Very Good	No problems noted.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionFebruary 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation7: Better than present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating59.7 US tons

Inventory rating33.2 US tons

Structure

Structure typeTee Beam

MaterialPrestressed Concrete

DeckConcrete, cast-in-place

Main spans1

Design loadHS 20

Structure length55 ft (16.8 m)

Longest span53 ft (16.2 m)

Deck width29 ft (8.7 m)

Roadway width28 ft (8.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic82 (2022)

Projected traffic82 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.9 mi (3 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 over Dd built?

It was built in 2005, making it 20 years old in 2025.

What condition is Local over Dd 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 February 2023.

How much traffic does Local over Dd carry?

About 82 vehicles per day (2022 count).

How long is Local over Dd?

The structure is 55 ft (16.8 m) long with a longest span of 53 ft (16.2 m) and a deck 29 ft wide.

Who owns Local over Dd?

It is owned by the County Highway Agency.