US Bridges

FM over Soap Creek

Poor

Appanoose County, Iowa · 070162906 · Structure no. 000000000065950

Built
1970
55 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
155 ft
3 main spans
Daily traffic
790
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Soap Creek is a prestressed concrete stringer/multi-beam or girder carrying FM over Soap Creek in Appanoose County, Iowa. It was built in 1970, so it is 55 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 790 vehicles a day, roughly 9% of them trucks, projected to reach 790 by 2043. The structure is 155 ft (47.2 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesFM
CrossesSoap Creek
Location070162906
RouteCounty Highway 0
StateIowa
Coordinates40.83057, -92.71828
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.1 US tons
Inventory rating36.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length155 ft (47.2 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic790 (2022)
Projected traffic790 by 2043
Trucks9%
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 Soap Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is FM over Soap Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.

How much traffic does FM over Soap Creek carry?

About 790 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is FM over Soap Creek?

The structure is 155 ft (47.2 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns FM over Soap Creek?

It is owned by the County Highway Agency.