US Bridges

FM over West Fork Nodaway River

Fair

Adair County, Iowa · 074332105 · Structure no. 000000000055421

Built
1979
46 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
179 ft
3 main spans
Daily traffic
249
2022 count
Owner
County
County Highway Agency

About this bridge

FM over West Fork Nodaway River is a prestressed concrete stringer/multi-beam or girder carrying FM over West Fork Nodaway River in Adair County, Iowa. It was built in 1979, so it is 46 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 249 vehicles a day, roughly 32% of them trucks, projected to reach 249 by 2043. The structure is 179 ft (54.6 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesFM
CrossesWest Fork Nodaway River
Location074332105
RouteCounty Highway 0
StateIowa
Coordinates41.20116, -94.64725
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.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating73.6 US tons
Inventory rating39.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length179 ft (54.6 m)
Longest span65 ft (19.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic249 (2022)
Projected traffic249 by 2043
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over West Fork Nodaway River built?

It was built in 1979, making it 46 years old in 2025.

What condition is FM over West Fork Nodaway River 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 April 2024.

How much traffic does FM over West Fork Nodaway River carry?

About 249 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is FM over West Fork Nodaway River?

The structure is 179 ft (54.6 m) long with a longest span of 65 ft (19.8 m) and a deck 32 ft wide.

Who owns FM over West Fork Nodaway River?

It is owned by the County Highway Agency.