US Bridges

Polk Ave over Drainage

Good

Plymouth County, Iowa · 093443502 · Structure no. 000000000276521

Built
2005
20 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
46 ft
1 main span
Daily traffic
11
2021 count
Owner
County
County Highway Agency

About this bridge

Polk Ave over Drainage is a concrete stringer/multi-beam or girder carrying Polk Ave over Drainage in Plymouth 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 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 11 vehicles a day, projected to reach 11 by 2044. The structure is 46 ft (14 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesPolk Ave
CrossesDrainage
Location093443502
RouteCounty Highway 0
CountyPlymouth County
StateIowa
Coordinates42.83079, -96.01628
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span45 ft (13.7 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2021)
Projected traffic11 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Polk Ave over Drainage built?

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

What condition is Polk Ave over Drainage 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 May 2023.

How much traffic does Polk Ave over Drainage carry?

About 11 vehicles per day (2021 count).

How long is Polk Ave over Drainage?

The structure is 46 ft (14 m) long with a longest span of 45 ft (13.7 m) and a deck 34 ft wide.

Who owns Polk Ave over Drainage?

It is owned by the County Highway Agency.