US Bridges

Ia 146 over Bear Creek

Good

Poweshiek County, Iowa · 0.5 Mi. S of Jct.Sr F-17 · Structure no. 000000000046021

Built
2005
20 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
171 ft
3 main spans
Daily traffic
2,490
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 146 over Bear Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 146 over Bear Creek in Poweshiek County, Iowa. It was built in 2005, so it is 20 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 2,490 vehicles a day, roughly 8% of them trucks, projected to reach 2,490 by 2043. The structure is 171 ft (52.1 m) long and 43 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesIa 146
CrossesBear Creek
Location0.5 Mi. S of Jct.Sr F-17
RouteState Highway 146
StateIowa
Coordinates41.8117, -92.72743
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.5 US tons
Inventory rating39.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span81 ft (24.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,490 (2023)
Projected traffic2,490 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Bear Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Ia 146 over Bear Creek 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 2024.

How much traffic does Ia 146 over Bear Creek carry?

About 2,490 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Ia 146 over Bear Creek?

The structure is 171 ft (52.1 m) long with a longest span of 81 ft (24.7 m) and a deck 43 ft wide.

Who owns Ia 146 over Bear Creek?

It is owned by the State Highway Agency.