US Bridges

Local 180th Ave over Small Stream

Fair

Delaware County, Iowa · 087050402 · Structure no. 000000000139760

Built
1945
80 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
97
2022 count
Owner
County
County Highway Agency

About this bridge

Local 180th Ave over Small Stream is a concrete culvert carrying Local 180th Ave over Small Stream in Delaware County, Iowa. It was built in 1945, so it is 80 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 97 vehicles a day, projected to reach 97 by 2043. The structure is 26 ft (7.9 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLocal 180th Ave
CrossesSmall Stream
Location087050402
RouteCounty Highway 0
CountyDelaware County
StateIowa
Coordinates42.37708, -91.44236
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.6 US tons
Inventory rating18.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span13 ft (4 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic97 (2022)
Projected traffic97 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local 180th Ave over Small Stream built?

It was built in 1945, making it 80 years old in 2025.

What condition is Local 180th Ave 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 March 2023.

How much traffic does Local 180th Ave over Small Stream carry?

About 97 vehicles per day (2022 count).

How long is Local 180th Ave over Small Stream?

The structure is 26 ft (7.9 m) long with a longest span of 13 ft (4 m) and a deck 26 ft wide.

Who owns Local 180th Ave over Small Stream?

It is owned by the County Highway Agency.