US Bridges

FM over South West Creek

Fair

Clarke County, Iowa · 072250603 · Structure no. 000000000114541

Built
1971
54 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
658
2022 count
Owner
County
County Highway Agency

About this bridge

FM over South West Creek is a concrete continuous slab carrying FM over South West Creek in Clarke County, Iowa. It was built in 1971, so it is 54 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 658 vehicles a day, roughly 11% of them trucks, projected to reach 658 by 2043. The structure is 102 ft (31.1 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesFM
CrossesSouth West Creek
Location072250603
RouteCounty Highway 0
StateIowa
Coordinates41.07365, -93.78703
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61 US tons
Inventory rating38.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length102 ft (31.1 m)
Longest span39 ft (11.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic658 (2022)
Projected traffic658 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over South West Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is FM over South West 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 September 2023.

How much traffic does FM over South West Creek carry?

About 658 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is FM over South West Creek?

The structure is 102 ft (31.1 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns FM over South West Creek?

It is owned by the County Highway Agency.