US Bridges

1 ST Ave. W over N Fork Maquoketa River

Fair

Dubuque County, Iowa · 000000000 · Structure no. 000000000024081

Built
1979
46 years old, rebuilt 2000
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
154 ft
2 main spans
Daily traffic
5,495
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

1 ST Ave. W over N Fork Maquoketa River is a prestressed concrete stringer/multi-beam or girder carrying 1 ST Ave. W over N Fork Maquoketa River in Dubuque County, Iowa. It was built in 1979 and reconstructed in 2000, so it is 46 years old, older 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 5,495 vehicles a day, projected to reach 5,495 by 2043. The structure is 154 ft (46.9 m) long and 56 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
Carries1 ST Ave. W
CrossesN Fork Maquoketa River
Location000000000
RouteCity Street 0
CountyDubuque County
StateIowa
Coordinates42.29919, -91.0128
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.7 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span75 ft (22.9 m)
Deck width56 ft (17.1 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,495 (2022)
Projected traffic5,495 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 1 ST Ave. W over N Fork Maquoketa River built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2000.

What condition is 1 ST Ave. W over N Fork Maquoketa River 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 July 2023.

How much traffic does 1 ST Ave. W over N Fork Maquoketa River carry?

About 5,495 vehicles per day (2022 count).

How long is 1 ST Ave. W over N Fork Maquoketa River?

The structure is 154 ft (46.9 m) long with a longest span of 75 ft (22.9 m) and a deck 56 ft wide.

Who owns 1 ST Ave. W over N Fork Maquoketa River?

It is owned by the City or Municipal Highway Agency.