US Bridges

7th ST over I-235/3rd St. Ramp B

Good

Polk County, Iowa · 1.5 Mi. W of US 69 · Structure no. 000000000042611

Built
2003
22 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
238 ft
2 main spans
Daily traffic
6,200
2022 count
Owner
State
State Highway Agency

About this bridge

7th ST over I-235/3rd St. Ramp B is a steel continuous stringer/multi-beam or girder carrying 7th ST over I-235/3rd St. Ramp B in Polk County, Iowa. It was built in 2003, so it is 22 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 6,200 vehicles a day, roughly 4% of them trucks, projected to reach 6,200 by 2042. The structure is 238 ft (72.5 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries7th ST
CrossesI-235/3rd St. Ramp B
Location1.5 Mi. W of US 69
RouteCity Street 0
CountyPolk County
StateIowa
Coordinates41.59601, -93.62688
Functional classUrban Minor Arterial

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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.3 US tons
Inventory rating36.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length238 ft (72.5 m)
Longest span146 ft (44.5 m)
Deck width58 ft (17.7 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,200 (2022)
Projected traffic6,200 by 2042
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 7th ST over I-235/3rd St. Ramp B built?

It was built in 2003, making it 22 years old in 2025.

What condition is 7th ST over I-235/3rd St. Ramp B 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 March 2023.

How much traffic does 7th ST over I-235/3rd St. Ramp B carry?

About 6,200 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is 7th ST over I-235/3rd St. Ramp B?

The structure is 238 ft (72.5 m) long with a longest span of 146 ft (44.5 m) and a deck 58 ft wide.

Who owns 7th ST over I-235/3rd St. Ramp B?

It is owned by the State Highway Agency.