US Bridges

128th Ave over North Bear Creek

Good

Winneshiek County, Iowa · 100071104 · Structure no. 000000000349151

Built
2006
19 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete Continuous
Length
125 ft
3 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

128th Ave over North Bear Creek is a concrete continuous slab carrying 128th Ave over North Bear Creek in Winneshiek County, Iowa. It was built in 2006, so it is 19 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 20 vehicles a day, projected to reach 20 by 2044. The structure is 125 ft (38.1 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries128th Ave
CrossesNorth Bear Creek
Location100071104
RouteCounty Highway 0
StateIowa
Coordinates43.49584, -91.65084
Functional classRural Local

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating97 US tons
Inventory rating58.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length125 ft (38.1 m)
Longest span49 ft (14.9 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 128th Ave over North Bear Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is 128th Ave over North 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 March 2024.

How much traffic does 128th Ave over North Bear Creek carry?

About 20 vehicles per day (2022 count).

How long is 128th Ave over North Bear Creek?

The structure is 125 ft (38.1 m) long with a longest span of 49 ft (14.9 m) and a deck 24 ft wide.

Who owns 128th Ave over North Bear Creek?

It is owned by the County Highway Agency.