Local over Drainage Ditch

Good

Humboldt County, Iowa · 091271402 · Structure no. 000000000184111

Built: 2004; 21 years old
Condition: Good; inspected November 2022
Type: Slab; Concrete Continuous
Length: 91 ft; 3 main spans
Daily traffic: 34; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Drainage Ditch is a concrete continuous slab carrying Local over Drainage Ditch in Humboldt County, Iowa. It was built in 2004, so it is 21 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 34 vehicles a day, projected to reach 34 by 2043. The structure is 91 ft (27.7 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLocal

CrossesDrainage Ditch

Location091271402

RouteCounty Highway 0

CountyHumboldt County

StateIowa

Coordinates42.69636, -94.01051

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 inspectionNovember 2022

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation8: Equal to present desirable criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment9: Superior to present desirable criteria

Operating rating83.3 US tons

Inventory rating49.9 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length91 ft (27.7 m)

Longest span34 ft (10.4 m)

Deck width27 ft (8.1 m)

Roadway width24 ft (7.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)

Projected traffic34 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.2 mi (2 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 Local over Drainage Ditch built?

It was built in 2004, making it 21 years old in 2025.

What condition is Local over Drainage Ditch 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 November 2022.

How much traffic does Local over Drainage Ditch carry?

About 34 vehicles per day (2022 count).

How long is Local over Drainage Ditch?

The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 27 ft wide.

Who owns Local over Drainage Ditch?

It is owned by the County Highway Agency.