US Bridges

Wb/Nb Ia 163 over Over UP RR

Good

Mahaska County, Iowa · 1.1 Mi. E of Jct. Ia 92 · Structure no. 000000000606710

Built
1997
28 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
175 ft
3 main spans
Daily traffic
3,900
2022 count
Owner
State
State Highway Agency

About this bridge

Wb/Nb Ia 163 over Over UP RR is a prestressed concrete stringer/multi-beam or girder carrying Wb/Nb Ia 163 over Over UP RR in Mahaska County, Iowa. It was built in 1997, so it is 28 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 3,900 vehicles a day, roughly 22% of them trucks, projected to reach 3,900 by 2044. The structure is 175 ft (53.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWb/Nb Ia 163
CrossesOver UP RR
Location1.1 Mi. E of Jct. Ia 92
RouteState Highway 163
CountyMahaska County
StateIowa
Coordinates41.28104, -92.66842
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.3 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length175 ft (53.3 m)
Longest span61 ft (18.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2022)
Projected traffic3,900 by 2044
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Wb/Nb Ia 163 over Over UP RR built?

It was built in 1997, making it 28 years old in 2025.

What condition is Wb/Nb Ia 163 over Over UP RR 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 March 2024.

How much traffic does Wb/Nb Ia 163 over Over UP RR carry?

About 3,900 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is Wb/Nb Ia 163 over Over UP RR?

The structure is 175 ft (53.3 m) long with a longest span of 61 ft (18.6 m) and a deck 43 ft wide.

Who owns Wb/Nb Ia 163 over Over UP RR?

It is owned by the State Highway Agency.