US Bridges

180th Street over Waterway

Good

Clinton County, Iowa · 082E21801 · Structure no. 000000000365305

Built
2007
18 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

180th Street over Waterway is a prestressed concrete stringer/multi-beam or girder carrying 180th Street over Waterway in Clinton County, Iowa. It was built in 2007, so it is 18 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 30 vehicles a day, projected to reach 30 by 2044. The structure is 25 ft (7.6 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries180th Street
CrossesWaterway
Location082E21801
RouteCounty Highway 0
StateIowa
Coordinates41.9164, -90.77492
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 protection9 ExcellentNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating63.9 US tons
Inventory rating38.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 180th Street over Waterway built?

It was built in 2007, making it 18 years old in 2025.

What condition is 180th Street over Waterway 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 2024.

How much traffic does 180th Street over Waterway carry?

About 30 vehicles per day (2022 count).

How long is 180th Street over Waterway?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 34 ft wide.

Who owns 180th Street over Waterway?

It is owned by the County Highway Agency.