US Bridges

I 35 NB over Iais RR

Good

Polk County, Iowa · 0.2 Mi. S of Grand Ave. · Structure no. 000000000041161

Built
2014
11 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
197 ft
3 main spans
Daily traffic
24,650
2022 count
Owner
State
State Highway Agency

About this bridge

I 35 NB over Iais RR is a prestressed concrete stringer/multi-beam or girder carrying I 35 NB 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 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 24,650 vehicles a day, roughly 15% of them trucks, projected to reach 24,650 by 2042. The structure is 197 ft (60.1 m) long and 67 ft wide.

CarriesI 35 NB
CrossesIais RR
Location0.2 Mi. S of Grand Ave.
RouteInterstate 35
StateIowa
Coordinates41.53825, -93.77472
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
Deck7 GoodSome minor problems.
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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length197 ft (60.1 m)
Longest span117 ft (35.7 m)
Deck width67 ft (20.3 m)
Roadway width63 ft (19.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,650 (2022)
Projected traffic24,650 by 2042
Trucks15%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 35 NB over Iais RR built?

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

What condition is I 35 NB 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 I 35 NB over Iais RR carry?

About 24,650 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is I 35 NB over Iais RR?

The structure is 197 ft (60.1 m) long with a longest span of 117 ft (35.7 m) and a deck 67 ft wide.

Who owns I 35 NB over Iais RR?

It is owned by the State Highway Agency.