US Bridges

K30 Elmwood Ave over Rock River

Good

Sioux County, Iowa · 097461606 · Structure no. 000000000312931

Built
2017
8 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
409 ft
3 main spans
Daily traffic
2,963
2022 count
Owner
County
County Highway Agency

About this bridge

K30 Elmwood Ave over Rock River is a prestressed concrete stringer/multi-beam or girder carrying K30 Elmwood Ave over Rock River in Sioux County, Iowa. It was built in 2017, so it is 8 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 2,963 vehicles a day, projected to reach 2,963 by 2043. The structure is 409 ft (124.7 m) long and 46 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesK30 Elmwood Ave
CrossesRock River
Location097461606
RouteCounty Highway 0
CountySioux County
StateIowa
Coordinates43.21458, -96.29504
Functional classRural Major Collector

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating69.3 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length409 ft (124.7 m)
Longest span137 ft (41.8 m)
Deck width46 ft (14 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,963 (2022)
Projected traffic2,963 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was K30 Elmwood Ave over Rock River built?

It was built in 2017, making it 8 years old in 2025.

What condition is K30 Elmwood Ave over Rock River 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 K30 Elmwood Ave over Rock River carry?

About 2,963 vehicles per day (2022 count).

How long is K30 Elmwood Ave over Rock River?

The structure is 409 ft (124.7 m) long with a longest span of 137 ft (41.8 m) and a deck 46 ft wide.

Who owns K30 Elmwood Ave over Rock River?

It is owned by the County Highway Agency.