US Bridges

FM over Des Moines River

Good

Webster County, Iowa · 090291303 · Structure no. 000000000343921

Built
1995
30 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
407 ft
4 main spans
Daily traffic
2,234
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 2,234 vehicles a day, roughly 21% of them trucks, projected to reach 2,234 by 2044. The structure is 407 ft (124.1 m) long and 33 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesFM
CrossesDes Moines River
Location090291303
RouteCounty Highway 0
StateIowa
Coordinates42.6158, -94.2148
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating98.3 US tons
Inventory rating45 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length407 ft (124.1 m)
Longest span101 ft (30.8 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,234 (2022)
Projected traffic2,234 by 2044
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 2024.

How much traffic does FM over Des Moines River carry?

About 2,234 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is FM over Des Moines River?

The structure is 407 ft (124.1 m) long with a longest span of 101 ft (30.8 m) and a deck 33 ft wide.

Who owns FM over Des Moines River?

It is owned by the County Highway Agency.