US Bridges

255th Ave over Creek

Good

Clinton County, Iowa · On 255th Ave. · Structure no. 000000000122262

Built
2023
2 years old
Condition
Good
inspected August 2024
Type
Girder and Floorbeam System
Steel
Length
21 ft
1 main span
Daily traffic
11
2023 count
Owner
County
County Highway Agency

About this bridge

255th Ave over Creek is a steel girder and floorbeam system carrying 255th Ave over Creek in Clinton County, Iowa. It was built in 2023, so it is 2 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 11 vehicles a day, projected to reach 11 by 2044. The structure is 21 ft (6.5 m) long and 32 ft wide.

Location

Open in Google Maps
Carries255th Ave
CrossesCreek
LocationOn 255th Ave.
RouteCounty Highway 0
CountyClinton County
StateIowa
Coordinates41.78317, -90.59735
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 inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.4 US tons
Inventory rating81 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length21 ft (6.5 m)
Longest span21 ft (6.5 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2023)
Projected traffic11 by 2044
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 255th Ave over Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is 255th Ave over Creek 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 August 2024.

How much traffic does 255th Ave over Creek carry?

About 11 vehicles per day (2023 count).

How long is 255th Ave over Creek?

The structure is 21 ft (6.5 m) long with a longest span of 21 ft (6.5 m) and a deck 32 ft wide.

Who owns 255th Ave over Creek?

It is owned by the County Highway Agency.