US Bridges

155th Ave over Stream

Good

Marion County, Iowa · 077190906 · Structure no. 000000000241131

Built
2011
14 years old
Condition
Good
inspected December 2023
Type
Slab
Steel
Length
39 ft
1 main span
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

155th Ave over Stream is a steel slab carrying 155th Ave over Stream in Marion County, Iowa. It was built in 2011, so it is 14 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11 vehicles a day, projected to reach 11 by 2043. The structure is 39 ft (11.9 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries155th Ave
CrossesStream
Location077190906
RouteCounty Highway 0
CountyMarion County
StateIowa
Coordinates41.49044, -93.05395
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating69.1 US tons

Structure

Structure typeSlab
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span38 ft (11.6 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic11 by 2043
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$60,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 155th Ave over Stream built?

It was built in 2011, making it 14 years old in 2025.

What condition is 155th Ave over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does 155th Ave over Stream carry?

About 11 vehicles per day (2022 count).

How long is 155th Ave over Stream?

The structure is 39 ft (11.9 m) long with a longest span of 38 ft (11.6 m) and a deck 24 ft wide.

Who owns 155th Ave over Stream?

It is owned by the County Highway Agency.