US Bridges

Ia 146 over UP RR

Good

Marshall County, Iowa · 0.5 MI South US#30 · Structure no. 000000000607300

Built
2019
6 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
287 ft
3 main spans
Daily traffic
2,200
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 146 over UP RR is a prestressed concrete stringer/multi-beam or girder carrying Ia 146 over UP RR in Marshall County, Iowa. It was built in 2019, so it is 6 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 2,200 vehicles a day, roughly 10% of them trucks, projected to reach 2,200 by 2043. The structure is 287 ft (87.4 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIa 146
CrossesUP RR
Location0.5 MI South US#30
RouteState Highway 146
CountyMarshall County
StateIowa
Coordinates42.00339, -92.78526
Functional classRural 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length287 ft (87.4 m)
Longest span126 ft (38.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2023)
Projected traffic2,200 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 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 Ia 146 over UP RR built?

It was built in 2019, making it 6 years old in 2025.

What condition is Ia 146 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 June 2023.

How much traffic does Ia 146 over UP RR carry?

About 2,200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ia 146 over UP RR?

The structure is 287 ft (87.4 m) long with a longest span of 126 ft (38.4 m) and a deck 43 ft wide.

Who owns Ia 146 over UP RR?

It is owned by the State Highway Agency.