US Bridges

FM over Walnut Creek

FairPosted for load

Poweshiek County, Iowa · 081152402 · Structure no. 000000000294621

Built
1991
34 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Walnut Creek is a steel stringer/multi-beam or girder carrying FM over Walnut Creek in Poweshiek County, Iowa. It was built in 1991, so it is 34 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 10 by 2043. The structure is 46 ft (14 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM
CrossesWalnut Creek
Location081152402
RouteCounty Highway 0
CountyPoweshiek County
StateIowa
Coordinates41.81446, -92.55229
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
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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.4 US tons
Inventory rating20.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckAluminum
Main spans1
Design loadUnknown
Structure length46 ft (14 m)
Longest span44 ft (13.4 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic10 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Walnut Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is FM over Walnut 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 December 2023.

How much traffic does FM over Walnut Creek carry?

About 10 vehicles per day (2022 count).

How long is FM over Walnut Creek?

The structure is 46 ft (14 m) long with a longest span of 44 ft (13.4 m) and a deck 30 ft wide.

Who owns FM over Walnut Creek?

It is owned by the County Highway Agency.