US Bridges

SB US 65 over I-80

Good

Polk County, Iowa · At West Junction of I-80 · Structure no. 000000000601100

Built
1992
33 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
319 ft
4 main spans
Daily traffic
735
2023 count
Owner
State
State Highway Agency

About this bridge

SB US 65 over I-80 is a steel continuous stringer/multi-beam or girder carrying SB US 65 over I-80 in Polk County, Iowa. It was built in 1992, so it is 33 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 735 vehicles a day, roughly 35% of them trucks, projected to reach 735 by 2043. The structure is 319 ft (97.2 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSB US 65
CrossesI-80
LocationAt West Junction of I-80
RouteU.S. Route 65
StateIowa
Coordinates41.66026, -93.52216
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.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length319 ft (97.2 m)
Longest span102 ft (31.1 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic735 (2023)
Projected traffic735 by 2043
Trucks35%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
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 I-80 built?

It was built in 1992, making it 33 years old in 2025.

What condition is SB US 65 over I-80 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 November 2023.

How much traffic does SB US 65 over I-80 carry?

About 735 vehicles per day (2023 count), of which roughly 35% are trucks.

How long is SB US 65 over I-80?

The structure is 319 ft (97.2 m) long with a longest span of 102 ft (31.1 m) and a deck 29 ft wide.

Who owns SB US 65 over I-80?

It is owned by the State Highway Agency.