US Bridges

FM over Des Moines River

Good

Webster County, Iowa · 088281714 · Structure no. 000000000342591

Built
1995
30 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
476 ft
5 main spans
Daily traffic
1,746
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Des Moines River is a prestressed concrete stringer/multi-beam or girder carrying FM over Des Moines River in Webster County, Iowa. It was built in 1995, so it is 30 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,746 vehicles a day, roughly 9% of them trucks, projected to reach 1,746 by 2042. The structure is 476 ft (145.1 m) long and 40 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesFM
CrossesDes Moines River
Location088281714
RouteCounty Highway 0
StateIowa
Coordinates42.43147, -94.13242
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating78.5 US tons
Inventory rating47 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length476 ft (145.1 m)
Longest span131 ft (39.9 m)
Deck width40 ft (12.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,746 (2022)
Projected traffic1,746 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Des Moines River built?

It was built in 1995, making it 30 years old in 2025.

What condition is FM over Des Moines River 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 Des Moines River carry?

About 1,746 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is FM over Des Moines River?

The structure is 476 ft (145.1 m) long with a longest span of 131 ft (39.9 m) and a deck 40 ft wide.

Who owns FM over Des Moines River?

It is owned by the County Highway Agency.