US Bridges

I35 NB Off Ramp over Iais RR

Good

Polk County, Iowa · 0.9 Mi. N Jct. Ia 5 · Structure no. 000000000700135

Built
2014
11 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
177 ft
3 main spans
Daily traffic
4,330
2022 count
Owner
State
State Highway Agency

About this bridge

I35 NB Off Ramp over Iais RR is a prestressed concrete stringer/multi-beam or girder carrying I35 NB Off Ramp over Iais RR in Polk County, Iowa. It was built in 2014, so it is 11 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,330 vehicles a day, roughly 8% of them trucks, projected to reach 4,330 by 2043. The structure is 177 ft (54 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesI35 NB Off Ramp
CrossesIais RR
Location0.9 Mi. N Jct. Ia 5
RouteInterstate 35
CountyPolk County
StateIowa
Coordinates41.53818, -93.77424
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length177 ft (54 m)
Longest span74 ft (22.6 m)
Deck width41 ft (12.4 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,330 (2022)
Projected traffic4,330 by 2043
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 I35 NB Off Ramp over Iais RR built?

It was built in 2014, making it 11 years old in 2025.

What condition is I35 NB Off Ramp over Iais RR 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 February 2023.

How much traffic does I35 NB Off Ramp over Iais RR carry?

About 4,330 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is I35 NB Off Ramp over Iais RR?

The structure is 177 ft (54 m) long with a longest span of 74 ft (22.6 m) and a deck 41 ft wide.

Who owns I35 NB Off Ramp over Iais RR?

It is owned by the State Highway Agency.