US Bridges

FM over So Racoon River

Good

Dallas County, Iowa · 078290706 · Structure no. 000000000131451

Built
2003
22 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
296 ft
3 main spans
Daily traffic
767
2022 count
Owner
County
County Highway Agency

About this bridge

FM over So Racoon River is a prestressed concrete stringer/multi-beam or girder carrying FM over So Racoon River in Dallas County, Iowa. It was built in 2003, so it is 22 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 767 vehicles a day, roughly 20% of them trucks, projected to reach 767 by 2043. The structure is 296 ft (90.2 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFM
CrossesSo Racoon River
Location078290706
RouteCounty Highway 0
StateIowa
Coordinates41.56359, -94.23341
Functional classRural Minor 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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72.6 US tons
Inventory rating38.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length296 ft (90.2 m)
Longest span112 ft (34.1 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic767 (2022)
Projected traffic767 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 So Racoon River built?

It was built in 2003, making it 22 years old in 2025.

What condition is FM over So Racoon 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 2023.

How much traffic does FM over So Racoon River carry?

About 767 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is FM over So Racoon River?

The structure is 296 ft (90.2 m) long with a longest span of 112 ft (34.1 m) and a deck 33 ft wide.

Who owns FM over So Racoon River?

It is owned by the County Highway Agency.