US Bridges

NB US 61 Ramp over Vacant Lots

Good

Dubuque County, Iowa · In Dubuque at Kerper Blvd · Structure no. 000000000601505

Built
1991
34 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
580 ft
4 main spans
Daily traffic
3,650
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 61 Ramp over Vacant Lots is a steel continuous stringer/multi-beam or girder carrying NB US 61 Ramp over Vacant Lots in Dubuque County, Iowa. It was built in 1991, so it is 34 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 3,650 vehicles a day, roughly 12% of them trucks, projected to reach 3,650 by 2043. The structure is 580 ft (176.8 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNB US 61 Ramp
CrossesVacant Lots
LocationIn Dubuque at Kerper Blvd
RouteU.S. Route 61
StateIowa
Coordinates42.51153, -90.65749
Functional classUrban Other Principal 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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length580 ft (176.8 m)
Longest span160 ft (48.8 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,650 (2022)
Projected traffic3,650 by 2043
Trucks12%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 NB US 61 Ramp over Vacant Lots built?

It was built in 1991, making it 34 years old in 2025.

What condition is NB US 61 Ramp over Vacant Lots 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 September 2023.

How much traffic does NB US 61 Ramp over Vacant Lots carry?

About 3,650 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is NB US 61 Ramp over Vacant Lots?

The structure is 580 ft (176.8 m) long with a longest span of 160 ft (48.8 m) and a deck 29 ft wide.

Who owns NB US 61 Ramp over Vacant Lots?

It is owned by the State Highway Agency.