US Bridges

M Ave over Stream

Fair

Iowa County, Iowa · 080100602 · Structure no. 000000000190352

Built
1953
72 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
1,790
2022 count
Owner
County
County Highway Agency

About this bridge

M Ave over Stream is a concrete continuous culvert carrying M Ave over Stream in Iowa County, Iowa. It was built in 1953, so it is 72 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 1,790 vehicles a day, roughly 9% of them trucks, projected to reach 1,790 by 2044. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesM Ave
CrossesStream
Location080100602
RouteCounty Highway 0
CountyIowa County
StateIowa
Coordinates41.76784, -92.06514
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,790 (2022)
Projected traffic1,790 by 2044
Trucks9%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M Ave over Stream built?

It was built in 1953, making it 72 years old in 2025.

What condition is M Ave 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 March 2024.

How much traffic does M Ave over Stream carry?

About 1,790 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is M Ave over Stream?

The structure is 27 ft (8.2 m) long with a longest span of 13 ft (4 m).

Who owns M Ave over Stream?

It is owned by the County Highway Agency.