FM over Drainage Ditch

Good

Humboldt County, Iowa · 091272301 · Structure no. 000000000184171

Built: 2007; 18 years old
Condition: Good; inspected November 2022
Type: Slab; Concrete Continuous
Length: 87 ft; 3 main spans
Daily traffic: 20; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Drainage Ditch is a concrete continuous slab carrying FM over Drainage Ditch in Humboldt 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 20 vehicles a day, projected to reach 20 by 2043. The structure is 87 ft (26.5 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps

CarriesFM

CrossesDrainage Ditch

Location091272301

RouteCounty Highway 0

CountyHumboldt County

StateIowa

Coordinates42.68808, -93.99989

Functional classRural Minor Collector

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 geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment6: Equal to present minimum criteria

Operating rating83.7 US tons

Inventory rating50 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length87 ft (26.5 m)

Longest span34 ft (10.4 m)

Deck width30 ft (9.1 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)

Projected traffic20 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 statusPossibly eligible for the National Register; requires further investigation

Work proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Drainage Ditch built?

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

What condition is FM 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 FM over Drainage Ditch carry?

About 20 vehicles per day (2022 count).

How long is FM over Drainage Ditch?

The structure is 87 ft (26.5 m) long with a longest span of 34 ft (10.4 m) and a deck 30 ft wide.

Who owns FM over Drainage Ditch?

It is owned by the County Highway Agency.