FM over Dry Run

Good

O'Brien County, Iowa · 095412401 · Structure no. 000000000260231

Built: 2001; 24 years old
Condition: Good; inspected July 2023
Type: Slab; Concrete Continuous
Length: 91 ft; 3 main spans
Daily traffic: 60; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Dry Run is a concrete continuous slab carrying FM over Dry Run in O'Brien County, Iowa. It was built in 2001, so it is 24 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 60 vehicles a day, projected to reach 60 by 2043. The structure is 91 ft (27.7 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesFM

CrossesDry Run

Location095412401

RouteCounty Highway 0

CountyO'Brien County

StateIowa

Coordinates43.04107, -95.63668

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 inspectionJuly 2023

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 alignment8: Equal to present desirable criteria

Operating rating68.3 US tons

Inventory rating40.1 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 width32 ft (9.9 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2022)

Projected traffic60 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed6.2 mi (10 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 proposedOther structural work, including hydraulic replacements

Estimated improvement cost$50,000 (2023 estimate)

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Dry Run built?

It was built in 2001, making it 24 years old in 2025.

What condition is FM over Dry Run 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 July 2023.

How much traffic does FM over Dry Run carry?

About 60 vehicles per day (2022 count).

How long is FM over Dry Run?

The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 32 ft wide.

Who owns FM over Dry Run?

It is owned by the County Highway Agency.