US Bridges

180th ST over Small Stream

FairPosted for load

Howard County, Iowa · 097140601 · Structure no. 000000000181921

Built
1986
39 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
48 ft
2 main spans
Daily traffic
21
2021 count
Owner
County
County Highway Agency

About this bridge

180th ST over Small Stream is a wood or timber stringer/multi-beam or girder carrying 180th ST over Small Stream in Howard County, Iowa. It was built in 1986, so it is 39 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 21 vehicles a day, projected to reach 21 by 2043. The structure is 48 ft (14.6 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
Carries180th ST
CrossesSmall Stream
Location097140601
RouteCounty Highway 0
CountyHoward County
StateIowa
Coordinates43.25536, -92.54704
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating22.8 US tons
Inventory rating16.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span22 ft (6.7 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2021)
Projected traffic21 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 180th ST over Small Stream built?

It was built in 1986, making it 39 years old in 2025.

What condition is 180th ST over Small Stream 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 2023.

How much traffic does 180th ST over Small Stream carry?

About 21 vehicles per day (2021 count).

How long is 180th ST over Small Stream?

The structure is 48 ft (14.6 m) long with a longest span of 22 ft (6.7 m) and a deck 25 ft wide.

Who owns 180th ST over Small Stream?

It is owned by the County Highway Agency.