US Bridges

NB US 65 over Trail

Fair

Polk County, Iowa · 4.1 Miles North of I-80 · Structure no. 000000000040571

Built
1979
46 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
340 ft
3 main spans
Daily traffic
4,100
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 65 over Trail is a steel continuous stringer/multi-beam or girder carrying NB US 65 over Trail in Polk County, Iowa. It was built in 1979, so it is 46 years old, older 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 6 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 4,100 vehicles a day, roughly 16% of them trucks, projected to reach 4,100 by 2044. The structure is 340 ft (103.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB US 65
CrossesTrail
Location4.1 Miles North of I-80
RouteU.S. Route 65
CountyPolk County
StateIowa
Coordinates41.70486, -93.43997
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
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 alignment7: Better than present minimum criteria
Operating rating62.1 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length340 ft (103.6 m)
Longest span130 ft (39.6 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2022)
Projected traffic4,100 by 2044
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
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 NB US 65 over Trail built?

It was built in 1979, making it 46 years old in 2025.

What condition is NB US 65 over Trail 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 June 2024.

How much traffic does NB US 65 over Trail carry?

About 4,100 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is NB US 65 over Trail?

The structure is 340 ft (103.6 m) long with a longest span of 130 ft (39.6 m) and a deck 44 ft wide.

Who owns NB US 65 over Trail?

It is owned by the State Highway Agency.