US Bridges

NB US 65 over US 6

Good

Polk County, Iowa · 1.0 Mile S of JCT I-80 · Structure no. 000000000601195

Built
1993
32 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
278 ft
4 main spans
Daily traffic
10,300
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 65 over US 6 is a prestressed concrete stringer/multi-beam or girder carrying NB US 65 over US 6 in Polk County, Iowa. It was built in 1993, so it is 32 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 10,300 vehicles a day, roughly 16% of them trucks, projected to reach 10,300 by 2043. The structure is 278 ft (84.7 m) long and 43 ft wide.

CarriesNB US 65
CrossesUS 6
Location1.0 Mile S of JCT I-80
RouteU.S. Route 65
StateIowa
Coordinates41.64714, -93.5123
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.3 US tons
Inventory rating28.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length278 ft (84.7 m)
Longest span96 ft (29.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,300 (2022)
Projected traffic10,300 by 2043
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB US 65 over US 6 built?

It was built in 1993, making it 32 years old in 2025.

What condition is NB US 65 over US 6 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 August 2023.

How much traffic does NB US 65 over US 6 carry?

About 10,300 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is NB US 65 over US 6?

The structure is 278 ft (84.7 m) long with a longest span of 96 ft (29.3 m) and a deck 43 ft wide.

Who owns NB US 65 over US 6?

It is owned by the State Highway Agency.