US Bridges

50th Ave over Unnamed Stream

Good

Marion County, Iowa · 077210202 · Structure no. 000000000241391

Built
2015
10 years old
Condition
Good
inspected December 2021
Type
Slab
Steel
Length
54 ft
1 main span
Daily traffic
21
2022 count
Owner
County
County Highway Agency

About this bridge

50th Ave over Unnamed Stream is a steel slab carrying 50th Ave over Unnamed Stream in Marion County, Iowa. It was built in 2015, so it is 10 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 21 vehicles a day, projected to reach 21 by 2043. The structure is 54 ft (16.5 m) long and 24 ft wide.

Location

Open in Google Maps
Carries50th Ave
CrossesUnnamed Stream
Location077210202
RouteCounty Highway 0
CountyMarion County
StateIowa
Coordinates41.50321, -93.25326
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 protection7 GoodSome minor problems.
Last inspectionDecember 2021
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.4 US tons
Inventory rating54.8 US tons

Structure

Structure typeSlab
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span53 ft (16.2 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2022)
Projected traffic21 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 50th Ave over Unnamed Stream built?

It was built in 2015, making it 10 years old in 2025.

What condition is 50th Ave over Unnamed 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 2021.

How much traffic does 50th Ave over Unnamed Stream carry?

About 21 vehicles per day (2022 count).

How long is 50th Ave over Unnamed Stream?

The structure is 54 ft (16.5 m) long with a longest span of 53 ft (16.2 m) and a deck 24 ft wide.

Who owns 50th Ave over Unnamed Stream?

It is owned by the County Highway Agency.