Local over Dd

Fair

Hardin County, Iowa · 087220602 · Structure no. 000000000175861

Built: 1990; 35 years old
Condition: Fair; inspected February 2023
Type: Tee Beam; Prestressed Concrete
Length: 39 ft; 1 main span
Daily traffic: 5; 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 1990, so it is 35 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5 vehicles a day, projected to reach 5 by 2043. The structure is 39 ft (11.9 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesLocal

CrossesDd

Location087220602

RouteCounty Highway 0

CountyHardin County

StateIowa

Coordinates42.38068, -93.46289

Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionFebruary 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry6: Equal to present minimum criteria

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating96.1 US tons

Inventory rating54.3 US tons

Structure

Structure typeTee Beam

MaterialPrestressed Concrete

DeckConcrete, precast panels

Main spans1

Design loadH 20

Structure length39 ft (11.9 m)

Longest span36 ft (11 m)

Deck width28 ft (8.5 m)

Roadway width28 ft (8.4 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)

Projected traffic5 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 1990, making it 35 years old in 2025.

What condition is Local over Dd in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2023.

How much traffic does Local over Dd carry?

About 5 vehicles per day (2022 count).

How long is Local over Dd?

The structure is 39 ft (11.9 m) long with a longest span of 36 ft (11 m) and a deck 28 ft wide.

Who owns Local over Dd?

It is owned by the County Highway Agency.