US Bridges

185th ST over Dry Creek

Good

Butler County, Iowa · 092161803 · Structure no. 000000000365600

Built
2010
15 years old
Condition
Good
inspected April 2022
Type
Slab
Steel
Length
30 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

185th ST over Dry Creek is a steel slab carrying 185th ST over Dry Creek in Butler County, Iowa. It was built in 2010, so it is 15 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 10 vehicles a day, projected to reach 10 by 2043. The structure is 30 ft (9.1 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries185th ST
CrossesDry Creek
Location092161803
RouteCounty Highway 0
CountyButler County
StateIowa
Coordinates42.78159, -92.78839
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating72.1 US tons

Structure

Structure typeSlab
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic10 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 185th ST over Dry Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is 185th ST over Dry Creek 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 April 2022.

How much traffic does 185th ST over Dry Creek carry?

About 10 vehicles per day (2022 count).

How long is 185th ST over Dry Creek?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 30 ft wide.

Who owns 185th ST over Dry Creek?

It is owned by the County Highway Agency.