FM over Dry Run

Fair

Osceola County, Iowa · 098421204 · Structure no. 000000000262800

Built: 1924; 101 years old, rebuilt 1990
Condition: Fair; inspected November 2024
Type: Culvert; Concrete Continuous
Length: 23 ft; 2 main spans
Daily traffic: 439; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Dry Run is a concrete continuous culvert carrying FM over Dry Run in Osceola County, Iowa. It was built in 1924 and reconstructed in 1990, so it is 101 years old, older 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 439 vehicles a day, roughly 20% of them trucks, projected to reach 439 by 2044. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesFM

CrossesDry Run

Location098421204

RouteCounty Highway 0

CountyOsceola County

StateIowa

Coordinates43.31779, -95.76236

Functional classRural Major Collector

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
Channel and channel protection	8 Very Good	No problems noted.
Culvert	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionNovember 2024

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

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating35.6 US tons

Inventory rating35.6 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans2

Design loadH 20

Structure length23 ft (7 m)

Longest span10 ft (3 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic439 (2022)

Projected traffic439 by 2044

Trucks20%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Dry Run built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1990.

What condition is FM over Dry Run 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 November 2024.

How much traffic does FM over Dry Run carry?

About 439 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is FM over Dry Run?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns FM over Dry Run?

It is owned by the County Highway Agency.