US Bridges

Pk 658(WANATA) over Little Sioux River

Good

Clay County, Iowa · In Wanata State Park · Structure no. 000000000699240

Built
1972
53 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
207 ft
3 main spans
Daily traffic
58
2022 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Pk 658(WANATA) over Little Sioux River is a prestressed concrete stringer/multi-beam or girder carrying Pk 658(WANATA) over Little Sioux River in Clay County, Iowa. It was built in 1972, so it is 53 years old, older 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 58 vehicles a day, projected to reach 58 by 2044. The structure is 207 ft (63.1 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesPk 658(WANATA)
CrossesLittle Sioux River
LocationIn Wanata State Park
RouteCity Street 0
StateIowa
Coordinates42.9144, -95.33953
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating47.8 US tons
Inventory rating21.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length207 ft (63.1 m)
Longest span69 ft (21 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58 (2022)
Projected traffic58 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

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation 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 Pk 658(WANATA) over Little Sioux River built?

It was built in 1972, making it 53 years old in 2025.

What condition is Pk 658(WANATA) over Little Sioux 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 September 2024.

How much traffic does Pk 658(WANATA) over Little Sioux River carry?

About 58 vehicles per day (2022 count).

How long is Pk 658(WANATA) over Little Sioux River?

The structure is 207 ft (63.1 m) long with a longest span of 69 ft (21 m) and a deck 26 ft wide.

Who owns Pk 658(WANATA) over Little Sioux River?

It is owned by the State Park, Forest, or Reservation Agency.