US Bridges

FM over So Raccoon River

Fair

Dallas County, Iowa · 078281610 · Structure no. 000000000131321

Built
1993
32 years old
Condition
Fair
inspected November 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
360 ft
4 main spans
Daily traffic
1,474
2022 count
Owner
County
County Highway Agency

About this bridge

FM over So Raccoon River is a prestressed concrete stringer/multi-beam or girder carrying FM over So Raccoon River in Dallas County, Iowa. It was built in 1993, so it is 32 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 6 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 1,474 vehicles a day, roughly 12% of them trucks, projected to reach 1,474 by 2043. The structure is 360 ft (109.7 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesFM
CrossesSo Raccoon River
Location078281610
RouteCounty Highway 0
CountyDallas County
StateIowa
Coordinates41.55472, -94.0743
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2021
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.1 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length360 ft (109.7 m)
Longest span97 ft (29.6 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,474 (2022)
Projected traffic1,474 by 2043
Trucks12%
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 Raccoon River built?

It was built in 1993, making it 32 years old in 2025.

What condition is FM over So Raccoon 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 November 2021.

How much traffic does FM over So Raccoon River carry?

About 1,474 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is FM over So Raccoon River?

The structure is 360 ft (109.7 m) long with a longest span of 97 ft (29.6 m) and a deck 33 ft wide.

Who owns FM over So Raccoon River?

It is owned by the County Highway Agency.