US Bridges

Idaho DR over Ia 163

Good

Marion County, Iowa · 1.3 Mi. W of SR T17 · Structure no. 000000000601445

Built
1994
31 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
240 ft
2 main spans
Daily traffic
5,322
2022 count
Owner
State
State Highway Agency

About this bridge

Idaho DR over Ia 163 is a steel continuous stringer/multi-beam or girder carrying Idaho DR over Ia 163 in Marion 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 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 5,322 vehicles a day, projected to reach 5,322 by 2043. The structure is 240 ft (73.2 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIdaho DR
CrossesIa 163
Location1.3 Mi. W of SR T17
RouteCity Street 0
StateIowa
Coordinates41.39732, -92.93359
Functional classUrban Minor Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.9 US tons
Inventory rating48.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span122 ft (37.2 m)
Deck width48 ft (14.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,322 (2022)
Projected traffic5,322 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Idaho DR over Ia 163 built?

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

What condition is Idaho DR over Ia 163 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 July 2023.

How much traffic does Idaho DR over Ia 163 carry?

About 5,322 vehicles per day (2022 count).

How long is Idaho DR over Ia 163?

The structure is 240 ft (73.2 m) long with a longest span of 122 ft (37.2 m) and a deck 48 ft wide.

Who owns Idaho DR over Ia 163?

It is owned by the State Highway Agency.