US Bridges

FM over S. Raccoon River

FairPosted for load

Guthrie County, Iowa · 078301003 · Structure no. 000000000166540

Built
1959
66 years old, rebuilt 2015
Condition
Fair
inspected November 2023
Type
Truss - Thru
Steel
Length
215 ft
1 main span
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

FM over S. Raccoon River is a steel truss - thru carrying FM over S. Raccoon River in Guthrie County, Iowa. It was built in 1959 and reconstructed in 2015, so it is 66 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 34 vehicles a day, projected to reach 34 by 2043. The structure is 215 ft (65.5 m) long and 19 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesFM
CrossesS. Raccoon River
Location078301003
RouteCounty Highway 0
CountyGuthrie County
StateIowa
Coordinates41.56186, -94.28734
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating61.6 US tons
Inventory rating36.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+1 approach)
Design loadHS 20
Structure length215 ft (65.5 m)
Longest span160 ft (48.8 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deck14 ft (4.4 m)

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2043
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over S. Raccoon River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2015.

What condition is FM over S. 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 2023.

How much traffic does FM over S. Raccoon River carry?

About 34 vehicles per day (2022 count).

How long is FM over S. Raccoon River?

The structure is 215 ft (65.5 m) long with a longest span of 160 ft (48.8 m) and a deck 19 ft wide.

Who owns FM over S. Raccoon River?

It is owned by the County Highway Agency.