US Bridges

I 235 EB Off Ramp over East 21st Street

Good

Polk County, Iowa · 0.3 Mi. E of Jct. Ia 163 · Structure no. 000000000609045

Built
2006
19 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
3,690
2022 count
Owner
State
State Highway Agency

About this bridge

I 235 EB Off Ramp over East 21st Street is a prestressed concrete stringer/multi-beam or girder carrying I 235 EB Off Ramp over East 21st Street in Polk County, Iowa. It was built in 2006, so it is 19 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 3,690 vehicles a day, roughly 9% of them trucks, projected to reach 3,690 by 2044. The structure is 90 ft (27.4 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 235 EB Off Ramp
CrossesEast 21st Street
Location0.3 Mi. E of Jct. Ia 163
RouteInterstate 235
StateIowa
Coordinates41.60252, -93.58083
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.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating59.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,690 (2022)
Projected traffic3,690 by 2044
Trucks9%
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 I 235 EB Off Ramp over East 21st Street built?

It was built in 2006, making it 19 years old in 2025.

What condition is I 235 EB Off Ramp over East 21st Street 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 October 2024.

How much traffic does I 235 EB Off Ramp over East 21st Street carry?

About 3,690 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is I 235 EB Off Ramp over East 21st Street?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns I 235 EB Off Ramp over East 21st Street?

It is owned by the State Highway Agency.