Local over Dd #98

Fair

Palo Alto County, Iowa · 094331302 · Structure no. 000000000268891

Built: 1987; 38 years old
Condition: Fair; inspected May 2023
Type: Slab; Concrete
Length: 35 ft; 1 main span
Daily traffic: 62; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Dd #98 is a concrete slab carrying Local over Dd #98 in Palo Alto County, Iowa. It was built in 1987, so it is 38 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 6 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 62 vehicles a day, projected to reach 62 by 2043. The structure is 35 ft (10.7 m) long and 30 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps

CarriesLocal

CrossesDd #98

Location094331302

RouteCounty Highway 0

CountyPalo Alto County

StateIowa

Coordinates42.96307, -94.6981

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	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionMay 2023

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating66.1 US tons

Inventory rating36.4 US tons

Structure

Structure typeSlab

MaterialConcrete

DeckConcrete, cast-in-place

Main spans1

Design loadH 20

Structure length35 ft (10.7 m)

Longest span30 ft (9.1 m)

Deck width30 ft (9.1 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)

Projected traffic62 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed8.7 mi (14 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 #98 built?

It was built in 1987, making it 38 years old in 2025.

What condition is Local over Dd #98 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 May 2023.

How much traffic does Local over Dd #98 carry?

About 62 vehicles per day (2022 count).

How long is Local over Dd #98?

The structure is 35 ft (10.7 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.

Who owns Local over Dd #98?

It is owned by the County Highway Agency.