US Bridges

NB I-35 EB I-80 over Drainage

Good

Polk County, Iowa · 0.2 Mi. E Jct. US 69 · Structure no. 000000000041651

Built
2000
25 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
198 ft
3 main spans
Daily traffic
42,300
2023 count
Owner
State
State Highway Agency

About this bridge

NB I-35 EB I-80 over Drainage is a prestressed concrete stringer/multi-beam or girder carrying NB I-35 EB I-80 over Drainage in Polk County, Iowa. It was built in 2000, so it is 25 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 42,300 vehicles a day, roughly 20% of them trucks, projected to reach 42,300 by 2043. The structure is 198 ft (60.4 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNB I-35 EB I-80
CrossesDrainage
Location0.2 Mi. E Jct. US 69
RouteInterstate 80
StateIowa
Coordinates41.65005, -93.59577
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 inspectionMay 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 rating84.2 US tons
Inventory rating50.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length198 ft (60.4 m)
Longest span87 ft (26.5 m)
Deck width67 ft (20.5 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,300 (2023)
Projected traffic42,300 by 2043
Trucks20%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
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 NB I-35 EB I-80 over Drainage built?

It was built in 2000, making it 25 years old in 2025.

What condition is NB I-35 EB I-80 over Drainage 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 May 2023.

How much traffic does NB I-35 EB I-80 over Drainage carry?

About 42,300 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is NB I-35 EB I-80 over Drainage?

The structure is 198 ft (60.4 m) long with a longest span of 87 ft (26.5 m) and a deck 67 ft wide.

Who owns NB I-35 EB I-80 over Drainage?

It is owned by the State Highway Agency.