US Bridges

185th Place over Stream

Good

Marion County, Iowa · 075193604 · Structure no. 000000000239971

Built
2018
7 years old
Condition
Good
inspected December 2024
Type
Slab
Steel
Length
40 ft
1 main span
Daily traffic
145
2022 count
Owner
County
County Highway Agency

About this bridge

185th Place over Stream is a steel slab carrying 185th Place over Stream in Marion County, Iowa. It was built in 2018, so it is 7 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 145 vehicles a day, projected to reach 145 by 2044. The structure is 40 ft (12.2 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries185th Place
CrossesStream
Location075193604
RouteCounty Highway 0
CountyMarion County
StateIowa
Coordinates41.256, -92.99991
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating110.1 US tons
Inventory rating69 US tons

Structure

Structure typeSlab
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic145 (2022)
Projected traffic145 by 2044
Trucks0%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 185th Place over Stream built?

It was built in 2018, making it 7 years old in 2025.

What condition is 185th Place 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 2024.

How much traffic does 185th Place over Stream carry?

About 145 vehicles per day (2022 count).

How long is 185th Place over Stream?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 24 ft wide.

Who owns 185th Place over Stream?

It is owned by the County Highway Agency.