US Bridges

Ia 28 NB over Raccoon River

Fair

Polk County, Iowa · 2.1 Miles S of JCT I-235 · Structure no. 000000000601315

Built
1994
31 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
605 ft
5 main spans
Daily traffic
12,650
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 28 NB over Raccoon River is a steel continuous stringer/multi-beam or girder carrying Ia 28 NB over Raccoon River in Polk County, Iowa. It was built in 1994, so it is 31 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 12,650 vehicles a day, roughly 4% of them trucks, projected to reach 12,650 by 2044. The structure is 605 ft (184.4 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIa 28 NB
CrossesRaccoon River
Location2.1 Miles S of JCT I-235
RouteState Highway 28
CountyPolk County
StateIowa
Coordinates41.56186, -93.70337
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 18 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.8 US tons
Inventory rating41.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length605 ft (184.4 m)
Longest span135 ft (41.1 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,650 (2022)
Projected traffic12,650 by 2044
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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 Ia 28 NB over Raccoon River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Ia 28 NB over Raccoon River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does Ia 28 NB over Raccoon River carry?

About 12,650 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Ia 28 NB over Raccoon River?

The structure is 605 ft (184.4 m) long with a longest span of 135 ft (41.1 m) and a deck 41 ft wide.

Who owns Ia 28 NB over Raccoon River?

It is owned by the State Highway Agency.