US Bridges

160th ST over Stream

Fair

Clayton County, Iowa · 094060403 · Structure no. 000000000120671

Built
1981
44 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
20 ft
1 main span
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

160th ST over Stream is a steel culvert carrying 160th ST over Stream in Clayton County, Iowa. It was built in 1981, so it is 44 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 11 vehicles a day, projected to reach 11 by 2044. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries160th ST
CrossesStream
Location094060403
RouteCounty Highway 0
CountyClayton County
StateIowa
Coordinates42.99338, -91.56687
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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.6 US tons
Inventory rating35.6 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span18 ft (5.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic11 by 2044
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 160th ST over Stream built?

It was built in 1981, making it 44 years old in 2025.

What condition is 160th ST over 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 October 2024.

How much traffic does 160th ST over Stream carry?

About 11 vehicles per day (2022 count).

How long is 160th ST over Stream?

The structure is 20 ft (6.1 m) long with a longest span of 18 ft (5.5 m).

Who owns 160th ST over Stream?

It is owned by the County Highway Agency.