255th Ave over Creek

Good

Scott County, Iowa · 080E53206 · Structure no. 000000000364180

Built: 1999; 26 years old
Condition: Good; inspected April 2023
Type: Tee Beam; Prestressed Concrete
Length: 30 ft; 1 main span
Daily traffic: 15; 2022 count
Owner: County; County Highway Agency

About this bridge

255th Ave over Creek is a prestressed concrete tee beam carrying 255th Ave over Creek in Scott County, Iowa. It was built in 1999, so it is 26 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 15 vehicles a day, projected to reach 15 by 2043. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps

Carries255th Ave

CrossesCreek

Location080E53206

RouteCounty Highway 0

CountyScott County

StateIowa

Coordinates41.69261, -90.40347

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.

Component	Rating	Meaning
Deck	8 Very Good	No problems noted.
Superstructure	8 Very Good	No problems noted.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionApril 2023

Inspection intervalevery 48 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 adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating68.5 US tons

Inventory rating41.1 US tons

Structure

Structure typeTee Beam

MaterialPrestressed Concrete

DeckConcrete, precast panels

Main spans1

Design loadHS 20

Structure length30 ft (9.1 m)

Longest span29 ft (8.8 m)

Deck width28 ft (8.5 m)

Roadway width28 ft (8.4 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)

Projected traffic15 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.1 mi (5 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—

NavigationNo navigation control on waterway

Frequently asked questions

When was 255th Ave over Creek built?

It was built in 1999, making it 26 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 April 2023.

How much traffic does 255th Ave over Creek carry?

About 15 vehicles per day (2022 count).

How long is 255th Ave over Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns 255th Ave over Creek?

It is owned by the County Highway Agency.