US Bridges

NW 66th Ave over Drainage District #1

Good

Polk County, Iowa · 079240421 · Structure no. 000000000281361

Built
2005
20 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
3,826
2023 count
Owner
County
County Highway Agency

About this bridge

NW 66th Ave over Drainage District #1 is a concrete continuous culvert carrying NW 66th Ave over Drainage District #1 in Polk 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 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 3,826 vehicles a day, projected to reach 3,826 by 2043. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNW 66th Ave
CrossesDrainage District #1
Location079240421
RouteCounty Highway 0
CountyPolk County
StateIowa
Coordinates41.68034, -93.63951
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.9 US tons
Inventory rating39.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,826 (2023)
Projected traffic3,826 by 2043
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 66th Ave over Drainage District #1 built?

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

What condition is NW 66th Ave over Drainage District #1 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 NW 66th Ave over Drainage District #1 carry?

About 3,826 vehicles per day (2023 count).

How long is NW 66th Ave over Drainage District #1?

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.7 m).

Who owns NW 66th Ave over Drainage District #1?

It is owned by the County Highway Agency.