US Bridges

Marion Ave over Stream

Good

Adair County, Iowa · 0.1 MI N of G27 on Marion · Structure no. 000000000056721

Built
2017
8 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
5
2022 count
Owner
County
County Highway Agency

About this bridge

Marion Ave over Stream is a steel stringer/multi-beam or girder carrying Marion Ave over Stream in Adair County, Iowa. It was built in 2017, so it is 8 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 5 vehicles a day, roughly 40% of them trucks, projected to reach 5 by 2044. The structure is 46 ft (14 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMarion Ave
CrossesStream
Location0.1 MI N of G27 on Marion
RouteCounty Highway 0
CountyAdair County
StateIowa
Coordinates41.4051, -94.47101
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.4 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span45 ft (13.7 m)
Deck width25 ft (7.5 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic5 by 2044
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Marion Ave over Stream built?

It was built in 2017, making it 8 years old in 2025.

What condition is Marion 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 July 2024.

How much traffic does Marion Ave over Stream carry?

About 5 vehicles per day (2022 count), of which roughly 40% are trucks.

How long is Marion Ave over Stream?

The structure is 46 ft (14 m) long with a longest span of 45 ft (13.7 m) and a deck 25 ft wide.

Who owns Marion Ave over Stream?

It is owned by the County Highway Agency.