US Bridges

Grand Ave over Johnson Creek

Good

Dallas County, Iowa · Grand Ave O Johnsoncreek · Structure no. 000000000505720

Built
2023
2 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
207 ft
3 main spans
Daily traffic
289
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grand Ave over Johnson Creek is a concrete stringer/multi-beam or girder carrying Grand Ave over Johnson Creek in Dallas 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 289 vehicles a day, projected to reach 289 by 2043. The structure is 207 ft (63.1 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesGrand Ave
CrossesJohnson Creek
LocationGrand Ave O Johnsoncreek
RouteCity Street 0
CountyDallas County
StateIowa
Coordinates41.53155, -93.85436
Functional classUrban 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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length207 ft (63.1 m)
Longest span92 ft (28 m)
Deck width64 ft (19.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic289 (2022)
Projected traffic289 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Grand Ave over Johnson Creek built?

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

What condition is Grand Ave over Johnson 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 October 2023.

How much traffic does Grand Ave over Johnson Creek carry?

About 289 vehicles per day (2022 count).

How long is Grand Ave over Johnson Creek?

The structure is 207 ft (63.1 m) long with a longest span of 92 ft (28 m) and a deck 64 ft wide.

Who owns Grand Ave over Johnson Creek?

It is owned by the City or Municipal Highway Agency.