US Bridges

NB US 61/151 over 4th 5th White ST

Fair

Dubuque County, Iowa · 0.6 Mi. N of US 20 · Structure no. 000000000601115

Built
1992
33 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
743 ft
4 main spans
Daily traffic
13,200
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 61/151 over 4th 5th White ST is a steel continuous stringer/multi-beam or girder carrying NB US 61/151 over 4th 5th White ST in Dubuque County, Iowa. It was built in 1992, so it is 33 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 13,200 vehicles a day, roughly 15% of them trucks, projected to reach 13,200 by 2044. The structure is 743 ft (226.5 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB US 61/151
Crosses4th 5th White ST
Location0.6 Mi. N of US 20
RouteU.S. Route 61
CountyDubuque County
StateIowa
Coordinates42.49708, -90.66302
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.5 US tons
Inventory rating35.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length743 ft (226.5 m)
Longest span190 ft (57.9 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic13,200 (2022)
Projected traffic13,200 by 2044
Trucks15%
Lanes on structure2
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 NB US 61/151 over 4th 5th White ST built?

It was built in 1992, making it 33 years old in 2025.

What condition is NB US 61/151 over 4th 5th White ST in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does NB US 61/151 over 4th 5th White ST carry?

About 13,200 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is NB US 61/151 over 4th 5th White ST?

The structure is 743 ft (226.5 m) long with a longest span of 190 ft (57.9 m) and a deck 40 ft wide.

Who owns NB US 61/151 over 4th 5th White ST?

It is owned by the State Highway Agency.