US Bridges

Ia 146 over UP RR & West Creek

Fair

Poweshiek County, Iowa · 0.1 Mi. E of Jct. SR F62 · Structure no. 000000000045981

Built
1986
39 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
305 ft
4 main spans
Daily traffic
2,250
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 146 over UP RR & West Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 146 over UP RR & West Creek in Poweshiek County, Iowa. It was built in 1986, so it is 39 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 6 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 2,250 vehicles a day, roughly 11% of them trucks, projected to reach 2,250 by 2043. The structure is 305 ft (93 m) long and 43 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesIa 146
CrossesUP RR & West Creek
Location0.1 Mi. E of Jct. SR F62
RouteState Highway 146
CountyPoweshiek County
StateIowa
Coordinates41.57413, -92.70115
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating86.1 US tons
Inventory rating51.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length305 ft (93 m)
Longest span97 ft (29.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,250 (2023)
Projected traffic2,250 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed14.9 mi (24 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 146 over UP RR & West Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Ia 146 over UP RR & West Creek 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 May 2024.

How much traffic does Ia 146 over UP RR & West Creek carry?

About 2,250 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Ia 146 over UP RR & West Creek?

The structure is 305 ft (93 m) long with a longest span of 97 ft (29.6 m) and a deck 43 ft wide.

Who owns Ia 146 over UP RR & West Creek?

It is owned by the State Highway Agency.