US Bridges

FM C-60 over West Fork Little Sioux

Fair

Plymouth County, Iowa · 090431001 · Structure no. 000000000270540

Built
1963
62 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
202 ft
3 main spans
Daily traffic
290
2022 count
Owner
County
County Highway Agency

About this bridge

FM C-60 over West Fork Little Sioux is a steel continuous stringer/multi-beam or girder carrying FM C-60 over West Fork Little Sioux in Plymouth County, Iowa. It was built in 1963, so it is 62 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 5 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 290 vehicles a day, roughly 25% of them trucks, projected to reach 290 by 2044. The structure is 202 ft (61.6 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesFM C-60
CrossesWest Fork Little Sioux
Location090431001
RouteCounty Highway 0
CountyPlymouth County
StateIowa
Coordinates42.63321, -95.90478
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.5 US tons
Inventory rating26.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length202 ft (61.6 m)
Longest span78 ft (23.8 m)
Deck width31 ft (9.3 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic290 (2022)
Projected traffic290 by 2044
Trucks25%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM C-60 over West Fork Little Sioux built?

It was built in 1963, making it 62 years old in 2025.

What condition is FM C-60 over West Fork Little Sioux 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 August 2024.

How much traffic does FM C-60 over West Fork Little Sioux carry?

About 290 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is FM C-60 over West Fork Little Sioux?

The structure is 202 ft (61.6 m) long with a longest span of 78 ft (23.8 m) and a deck 31 ft wide.

Who owns FM C-60 over West Fork Little Sioux?

It is owned by the County Highway Agency.