US Bridges

Ia 28 SB over Raccoon River

Good

Polk County, Iowa · 3.7 Mi. N. of Ia 5 · Structure no. 000000000701125

Built
2022
3 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
632 ft
4 main spans
Daily traffic
12,600
2021 count
Owner
State
State Highway Agency

About this bridge

Ia 28 SB over Raccoon River is a prestressed concrete stringer/multi-beam or girder carrying Ia 28 SB over Raccoon River in Polk County, Iowa. It was built in 2022, so it is 3 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 12,600 vehicles a day, roughly 7% of them trucks, projected to reach 12,600 by 2043. The structure is 632 ft (192.6 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIa 28 SB
CrossesRaccoon River
Location3.7 Mi. N. of Ia 5
RouteState Highway 28
StateIowa
Coordinates41.56351, -93.7036
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length632 ft (192.6 m)
Longest span157 ft (47.9 m)
Deck width52 ft (15.7 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,600 (2021)
Projected traffic12,600 by 2043
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 SB over Raccoon River built?

It was built in 2022, making it 3 years old in 2025.

What condition is Ia 28 SB over Raccoon 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 April 2023.

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

About 12,600 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Ia 28 SB over Raccoon River?

The structure is 632 ft (192.6 m) long with a longest span of 157 ft (47.9 m) and a deck 52 ft wide.

Who owns Ia 28 SB over Raccoon River?

It is owned by the State Highway Agency.