US Bridges

SB US 61 Ramp over Vacant Lots

Good

Dubuque County, Iowa · 0.5 Miles N. of Ia. # 3 · Structure no. 000000000601510

Built
1991
34 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
577 ft
4 main spans
Daily traffic
3,820
2022 count
Owner
State
State Highway Agency

About this bridge

SB US 61 Ramp over Vacant Lots is a steel continuous stringer/multi-beam or girder carrying SB 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 3,820 vehicles a day, roughly 9% of them trucks, projected to reach 3,820 by 2043. The structure is 577 ft (175.9 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB US 61 Ramp
CrossesVacant Lots
Location0.5 Miles N. of Ia. # 3
RouteU.S. Route 61
CountyDubuque County
StateIowa
Coordinates42.51387, -90.65526
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating86 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length577 ft (175.9 m)
Longest span160 ft (48.8 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,820 (2022)
Projected traffic3,820 by 2043
Trucks9%
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 SB US 61 Ramp over Vacant Lots built?

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

What condition is SB 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 December 2023.

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

About 3,820 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is SB US 61 Ramp over Vacant Lots?

The structure is 577 ft (175.9 m) long with a longest span of 160 ft (48.8 m) and a deck 33 ft wide.

Who owns SB US 61 Ramp over Vacant Lots?

It is owned by the State Highway Agency.