US Bridges

Polk Ave over Deep Creek

Poor

Plymouth County, Iowa · 092440202 · Structure no. 000000000274210

Built
1958
67 years old
Condition
Poor
inspected May 2023
Type
Truss - Thru
Steel
Length
120 ft
1 main span
Daily traffic
60
2021 count
Owner
County
County Highway Agency

About this bridge

Polk Ave over Deep Creek is a steel truss - thru carrying Polk Ave over Deep Creek in Plymouth County, Iowa. It was built in 1958, so it is 67 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 60 vehicles a day, projected to reach 60 by 2044. The structure is 120 ft (36.6 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesPolk Ave
CrossesDeep Creek
Location092440202
RouteCounty Highway 0
CountyPlymouth County
StateIowa
Coordinates42.81852, -96.01651
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span120 ft (36.6 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6 m)
Vertical clearance over deck14 ft (4.3 m)

Traffic and service

Average daily traffic60 (2021)
Projected traffic60 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Deep Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Polk Ave over Deep Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does Polk Ave over Deep Creek carry?

About 60 vehicles per day (2021 count).

How long is Polk Ave over Deep Creek?

The structure is 120 ft (36.6 m) long with a longest span of 120 ft (36.6 m) and a deck 22 ft wide.

Who owns Polk Ave over Deep Creek?

It is owned by the County Highway Agency.