US Bridges

235th Street over Wapsipinicon River

PoorClosed to traffic

Clinton County, Iowa · 081E11105 · Structure no. 000000000121690

Built
1930
95 years old
Condition
Poor
inspected January 2017
Type
Girder and Floorbeam System
Steel
Length
420 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

235th Street over Wapsipinicon River is a steel girder and floorbeam system carrying 235th Street over Wapsipinicon River in Clinton County, Iowa. It was built in 1930, so it is 95 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 100 vehicles a day, projected to reach 100 by 2043. The structure is 420 ft (128 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries235th Street
CrossesWapsipinicon River
Location081E11105
RouteCounty Highway 0
StateIowa
Coordinates41.83302, -90.8111
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2017
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+6 approach)
Design loadH 15
Structure length420 ft (128 m)
Longest span82 ft (25 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic100 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 235th Street over Wapsipinicon River built?

It was built in 1930, making it 95 years old in 2025.

What condition is 235th Street over Wapsipinicon River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2017.

How much traffic does 235th Street over Wapsipinicon River carry?

About 100 vehicles per day (2022 count).

How long is 235th Street over Wapsipinicon River?

The structure is 420 ft (128 m) long with a longest span of 82 ft (25 m) and a deck 27 ft wide.

Who owns 235th Street over Wapsipinicon River?

It is owned by the County Highway Agency.