US Bridges

180th ST over Unamed Creek

Fair

Fayette County, Iowa · 093091201 · Structure no. 000000000151411

Built
1998
27 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
30 ft
3 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

180th ST over Unamed Creek is a steel culvert carrying 180th ST over Unamed Creek in Fayette County, Iowa. It was built in 1998, so it is 27 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.

It carries about 20 vehicles a day, projected to reach 20 by 2044. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries180th ST
CrossesUnamed Creek
Location093091201
RouteCounty Highway 0
CountyFayette County
StateIowa
Coordinates42.89038, -91.85129
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 180th ST over Unamed Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is 180th ST over Unamed 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 October 2024.

How much traffic does 180th ST over Unamed Creek carry?

About 20 vehicles per day (2022 count).

How long is 180th ST over Unamed Creek?

The structure is 30 ft (9.1 m) long with a longest span of 8 ft (2.4 m).

Who owns 180th ST over Unamed Creek?

It is owned by the County Highway Agency.