US Bridges

FM over Walnut Creek (ten Mile)

Fair

Winneshiek County, Iowa · 098090105 · Structure no. 000000000347790

Built
1950
75 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
143 ft
3 main spans
Daily traffic
344
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Walnut Creek (ten Mile) is a concrete continuous stringer/multi-beam or girder carrying FM over Walnut Creek (ten Mile) in Winneshiek County, Iowa. It was built in 1950, so it is 75 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 344 vehicles a day, roughly 9% of them trucks, projected to reach 344 by 2043. The structure is 143 ft (43.6 m) long and 26 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesFM
CrossesWalnut Creek (ten Mile)
Location098090105
RouteCounty Highway 0
CountyWinneshiek County
StateIowa
Coordinates43.33306, -91.85269
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40.9 US tons
Inventory rating24.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length143 ft (43.6 m)
Longest span55 ft (16.8 m)
Deck width26 ft (8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic344 (2022)
Projected traffic344 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Walnut Creek (ten Mile) built?

It was built in 1950, making it 75 years old in 2025.

What condition is FM over Walnut Creek (ten Mile) 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 March 2023.

How much traffic does FM over Walnut Creek (ten Mile) carry?

About 344 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is FM over Walnut Creek (ten Mile)?

The structure is 143 ft (43.6 m) long with a longest span of 55 ft (16.8 m) and a deck 26 ft wide.

Who owns FM over Walnut Creek (ten Mile)?

It is owned by the County Highway Agency.