US Bridges

135th Street over Small Stream

Good

Clinton County, Iowa · 135 ST 1/2 MI W of 362 Av · Structure no. 000000000125532

Built
2024
1 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
37
2023 count
Owner
County
County Highway Agency

About this bridge

135th Street over Small Stream is a prestressed concrete tee beam carrying 135th Street over Small Stream in Clinton County, Iowa. It was built in 2024, so it is 1 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 37 vehicles a day, projected to reach 37 by 2043. The structure is 41 ft (12.6 m) long and 29 ft wide.

Carries135th Street
CrossesSmall Stream
Location135 ST 1/2 MI W of 362 Av
RouteCounty Highway 0
StateIowa
Coordinates41.98229, -90.39499
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.7 US tons
Inventory rating34.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length41 ft (12.6 m)
Longest span37 ft (11.4 m)
Deck width29 ft (8.9 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37 (2023)
Projected traffic37 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 135th Street over Small Stream built?

It was built in 2024, making it 1 years old in 2025.

What condition is 135th Street over Small Stream 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 September 2024.

How much traffic does 135th Street over Small Stream carry?

About 37 vehicles per day (2023 count).

How long is 135th Street over Small Stream?

The structure is 41 ft (12.6 m) long with a longest span of 37 ft (11.4 m) and a deck 29 ft wide.

Who owns 135th Street over Small Stream?

It is owned by the County Highway Agency.