US Bridges

255th ST over Small Stream

Good

Butler County, Iowa · App. 550 W. of Silver LN · Structure no. 000000000087451

Built
2019
6 years old
Condition
Good
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
11
2021 count
Owner
County
County Highway Agency

About this bridge

255th ST over Small Stream is a prestressed concrete tee beam carrying 255th ST over Small Stream in Butler County, Iowa. It was built in 2019, so it is 6 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 11 vehicles a day, projected to reach 11 by 2043. The structure is 56 ft (17.1 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries255th ST
CrossesSmall Stream
LocationApp. 550 W. of Silver LN
RouteCounty Highway 0
CountyButler County
StateIowa
Coordinates42.67866, -92.66462
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating33 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span55 ft (16.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2021)
Projected traffic11 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 255th ST over Small Stream built?

It was built in 2019, making it 6 years old in 2025.

What condition is 255th ST 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 April 2023.

How much traffic does 255th ST over Small Stream carry?

About 11 vehicles per day (2021 count).

How long is 255th ST over Small Stream?

The structure is 56 ft (17.1 m) long with a longest span of 55 ft (16.8 m) and a deck 28 ft wide.

Who owns 255th ST over Small Stream?

It is owned by the County Highway Agency.