US Bridges

W20 Pole Line RD over Upper Iowa River

Good

Winneshiek County, Iowa · 1.2 Mi. W of Jct. HWY 52 · Structure no. 000000000347551

Built
2022
3 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
334 ft
3 main spans
Daily traffic
891
2023 count
Owner
County
County Highway Agency

About this bridge

W20 Pole Line RD over Upper Iowa River is a prestressed concrete stringer/multi-beam or girder carrying W20 Pole Line RD over Upper Iowa River in Winneshiek County, Iowa. It was built in 2022, so it is 3 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 891 vehicles a day, roughly 6% of them trucks, projected to reach 891 by 2043. The structure is 334 ft (101.8 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesW20 Pole Line RD
CrossesUpper Iowa River
Location1.2 Mi. W of Jct. HWY 52
RouteCounty Highway 0
StateIowa
Coordinates43.32902, -91.83274
Functional classRural Major Collector

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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length334 ft (101.8 m)
Longest span112 ft (34.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic891 (2023)
Projected traffic891 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 W20 Pole Line RD over Upper Iowa River built?

It was built in 2022, making it 3 years old in 2025.

What condition is W20 Pole Line RD over Upper Iowa 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 March 2023.

How much traffic does W20 Pole Line RD over Upper Iowa River carry?

About 891 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is W20 Pole Line RD over Upper Iowa River?

The structure is 334 ft (101.8 m) long with a longest span of 112 ft (34.1 m) and a deck 43 ft wide.

Who owns W20 Pole Line RD over Upper Iowa River?

It is owned by the County Highway Agency.