US Bridges

SB US 65 over US 6

Fair

Polk County, Iowa · 1.0 Mile S of Jct. I-80 · Structure no. 000000000601190

Built
1993
32 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
278 ft
4 main spans
Daily traffic
10,650
2023 count
Owner
State
State Highway Agency

About this bridge

SB US 65 over US 6 is a prestressed concrete stringer/multi-beam or girder carrying SB 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 10,650 vehicles a day, roughly 16% of them trucks, projected to reach 10,650 by 2043. The structure is 278 ft (84.7 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesSB US 65
CrossesUS 6
Location1.0 Mile S of Jct. I-80
RouteU.S. Route 65
CountyPolk County
StateIowa
Coordinates41.6477, -93.51306
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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

Structure typeStringer/Multi-beam or Girder
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 traffic10,650 (2023)
Projected traffic10,650 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 SB US 65 over US 6 built?

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

What condition is SB US 65 over US 6 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

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

About 10,650 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is SB 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 SB US 65 over US 6?

It is owned by the State Highway Agency.