US Bridges

Rochester Ave over Ralston Creek

Good

Johnson County, Iowa · 079061100 · Structure no. 000000000006331

Built
2014
11 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
6,667
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rochester Ave over Ralston Creek is a prestressed concrete stringer/multi-beam or girder carrying Rochester Ave over Ralston Creek in Johnson County, Iowa. It was built in 2014, so it is 11 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 6,667 vehicles a day, projected to reach 6,667 by 2043. The structure is 58 ft (17.7 m) long and 56 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesRochester Ave
CrossesRalston Creek
Location079061100
RouteCity Street 0
CountyJohnson County
StateIowa
Coordinates41.6639, -91.51371
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length58 ft (17.7 m)
Longest span55 ft (16.8 m)
Deck width56 ft (17.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,667 (2022)
Projected traffic6,667 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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Rochester Ave over Ralston Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is Rochester Ave over Ralston 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 June 2023.

How much traffic does Rochester Ave over Ralston Creek carry?

About 6,667 vehicles per day (2022 count).

How long is Rochester Ave over Ralston Creek?

The structure is 58 ft (17.7 m) long with a longest span of 55 ft (16.8 m) and a deck 56 ft wide.

Who owns Rochester Ave over Ralston Creek?

It is owned by the City or Municipal Highway Agency.