US Bridges

135th over Side Ditch Bridge

Good

Washington County, Iowa · 1.8 Mi. S of Iowa #22 · Structure no. 000000000601225

Built
1993
32 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
10
2022 count
Owner
State
State Highway Agency

About this bridge

135th over Side Ditch Bridge is a concrete continuous culvert carrying 135th over Side Ditch Bridge in Washington County, Iowa. It was built in 1993, so it is 32 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 7 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 26 ft (7.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Carries135th
CrossesSide Ditch Bridge
Location1.8 Mi. S of Iowa #22
RouteCounty Highway 0
StateIowa
Coordinates41.46057, -91.54877
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 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

OwnerState Highway Agency
Maintained byState 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 135th over Side Ditch Bridge built?

It was built in 1993, making it 32 years old in 2025.

What condition is 135th over Side Ditch Bridge 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 May 2023.

How much traffic does 135th over Side Ditch Bridge carry?

About 10 vehicles per day (2022 count).

How long is 135th over Side Ditch Bridge?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns 135th over Side Ditch Bridge?

It is owned by the State Highway Agency.