US Bridges

SB US 65 over Winnebago River

Good

Cerro Gordo County, Iowa · 0.1 Mi. N of S.R. B20 · Structure no. 000000000019011

Built
2009
16 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
223 ft
3 main spans
Daily traffic
3,250
2022 count
Owner
State
State Highway Agency

About this bridge

SB US 65 over Winnebago River is a steel stringer/multi-beam or girder carrying SB US 65 over Winnebago River in Cerro Gordo County, Iowa. It was built in 2009, so it is 16 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 3,250 vehicles a day, roughly 7% of them trucks, projected to reach 3,250 by 2043. The structure is 223 ft (68 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB US 65
CrossesWinnebago River
Location0.1 Mi. N of S.R. B20
RouteU.S. Route 65
CountyCerro Gordo County
StateIowa
Coordinates43.19325, -93.21064
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.7 US tons
Inventory rating41.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length223 ft (68 m)
Longest span88 ft (26.8 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,250 (2022)
Projected traffic3,250 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 SB US 65 over Winnebago River built?

It was built in 2009, making it 16 years old in 2025.

What condition is SB US 65 over Winnebago River 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 November 2023.

How much traffic does SB US 65 over Winnebago River carry?

About 3,250 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SB US 65 over Winnebago River?

The structure is 223 ft (68 m) long with a longest span of 88 ft (26.8 m) and a deck 43 ft wide.

Who owns SB US 65 over Winnebago River?

It is owned by the State Highway Agency.