US Bridges

FM over Slough Creek

Fair

Floyd County, Iowa · 097151902 · Structure no. 000000000155821

Built
1987
38 years old
Condition
Fair
inspected April 2022
Type
Tee Beam
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
59
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Slough Creek is a prestressed concrete tee beam carrying FM over Slough Creek in Floyd County, Iowa. It was built in 1987, so it is 38 years old, younger 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 59 vehicles a day, projected to reach 59 by 2043. The structure is 52 ft (15.9 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFM
CrossesSlough Creek
Location097151902
RouteCounty Highway 0
StateIowa
Coordinates43.20943, -92.67248
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2022
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating74.7 US tons
Inventory rating37.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length52 ft (15.9 m)
Longest span50 ft (15.2 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59 (2022)
Projected traffic59 by 2043
Trucks0%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Slough Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is FM over Slough 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 April 2022.

How much traffic does FM over Slough Creek carry?

About 59 vehicles per day (2022 count).

How long is FM over Slough Creek?

The structure is 52 ft (15.9 m) long with a longest span of 50 ft (15.2 m) and a deck 27 ft wide.

Who owns FM over Slough Creek?

It is owned by the County Highway Agency.