FM over Dry Run

Fair

Osceola County, Iowa · 099391601 · Structure no. 000000000262951

Built: 1988; 37 years old
Condition: Fair; inspected November 2024
Type: Slab; Concrete Continuous
Length: 91 ft; 3 main spans
Daily traffic: 399; 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 Osceola County, Iowa. It was built in 1988, so it is 37 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 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 399 vehicles a day, roughly 36% of them trucks, projected to reach 399 by 2044. The structure is 91 ft (27.7 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesFM

CrossesDry Run

Location099391601

RouteCounty Highway 0

CountyOsceola County

StateIowa

Coordinates43.40053, -95.45661

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
Deck	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

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

Deck geometry6: Equal to present minimum criteria

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating76.5 US tons

Inventory rating45.2 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20 + Mod

Structure length91 ft (27.7 m)

Longest span34 ft (10.4 m)

Deck width33 ft (10.1 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic399 (2022)

Projected traffic399 by 2044

Trucks36%

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 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 FM over Dry Run built?

It was built in 1988, making it 37 years old in 2025.

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 399 vehicles per day (2022 count), of which roughly 36% are trucks.

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 33 ft wide.

Who owns FM over Dry Run?

It is owned by the County Highway Agency.