US Bridges

Cottage Grove over Cottage Grove

Good

Polk County, Iowa · 3.0 Mi. E of Jct. Ia #28 · Structure no. 000000000042431

Built
2003
22 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
389 ft
5 main spans
Daily traffic
4,200
2022 count
Owner
State
State Highway Agency

About this bridge

Cottage Grove over Cottage Grove is a steel continuous stringer/multi-beam or girder carrying Cottage Grove over Cottage Grove in Polk County, Iowa. It was built in 2003, so it is 22 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 4,200 vehicles a day, projected to reach 4,200 by 2044. The structure is 389 ft (118.6 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCottage Grove
CrossesCottage Grove
Location3.0 Mi. E of Jct. Ia #28
RouteCity Street 0
StateIowa
Coordinates41.59566, -93.64851
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length389 ft (118.6 m)
Longest span203 ft (61.9 m)
Deck width66 ft (20.1 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2022)
Projected traffic4,200 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Cottage Grove over Cottage Grove built?

It was built in 2003, making it 22 years old in 2025.

What condition is Cottage Grove over Cottage Grove 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 May 2024.

How much traffic does Cottage Grove over Cottage Grove carry?

About 4,200 vehicles per day (2022 count).

How long is Cottage Grove over Cottage Grove?

The structure is 389 ft (118.6 m) long with a longest span of 203 ft (61.9 m) and a deck 66 ft wide.

Who owns Cottage Grove over Cottage Grove?

It is owned by the State Highway Agency.