US Bridges

185th Avenue over Drainage Ditch #10

Good

Clinton County, Iowa · 082E22104 · Structure no. 000000000123272

Built
2006
19 years old
Condition
Good
inspected February 2021
Type
Tee Beam
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

185th Avenue over Drainage Ditch #10 is a prestressed concrete tee beam carrying 185th Avenue over Drainage Ditch #10 in Clinton County, Iowa. It was built in 2006, so it is 19 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 26 vehicles a day, projected to reach 26 by 2043. The structure is 48 ft (14.6 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries185th Avenue
CrossesDrainage Ditch #10
Location082E22104
RouteCounty Highway 0
CountyClinton County
StateIowa
Coordinates41.89663, -90.73308
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 inspectionFebruary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span46 ft (14 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck14 ft (4.3 m)

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 185th Avenue over Drainage Ditch #10 built?

It was built in 2006, making it 19 years old in 2025.

What condition is 185th Avenue over Drainage Ditch #10 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 February 2021.

How much traffic does 185th Avenue over Drainage Ditch #10 carry?

About 26 vehicles per day (2022 count).

How long is 185th Avenue over Drainage Ditch #10?

The structure is 48 ft (14.6 m) long with a longest span of 46 ft (14 m) and a deck 28 ft wide.

Who owns 185th Avenue over Drainage Ditch #10?

It is owned by the County Highway Agency.