US Bridges

FM over Stofferan Creek

Fair

O'Brien County, Iowa · 095420302 · Structure no. 000000000260361

Built
1976
49 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
1,277
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Stofferan Creek is a prestressed concrete stringer/multi-beam or girder carrying FM over Stofferan Creek in O'Brien County, Iowa. It was built in 1976, so it is 49 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.

It carries about 1,277 vehicles a day, roughly 23% of them trucks, projected to reach 1,277 by 2043. The structure is 36 ft (11 m) long and 39 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM
CrossesStofferan Creek
Location095420302
RouteCounty Highway 0
CountyO'Brien County
StateIowa
Coordinates43.08137, -95.80139
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 48 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 rating59.6 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,277 (2022)
Projected traffic1,277 by 2043
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$60,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Stofferan Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is FM over Stofferan Creek 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 July 2023.

How much traffic does FM over Stofferan Creek carry?

About 1,277 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is FM over Stofferan Creek?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 39 ft wide.

Who owns FM over Stofferan Creek?

It is owned by the County Highway Agency.