US Bridges

NB NW Arterial over Over Cc RR & Catfish Ck

Fair

Dubuque County, Iowa · 0.2 Mi. N of Jct. US 20 · Structure no. 000000000503675

Built
1982
43 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
297 ft
4 main spans
Daily traffic
5,295
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

NB NW Arterial over Over Cc RR & Catfish Ck is a prestressed concrete stringer/multi-beam or girder carrying NB NW Arterial over Over Cc RR & Catfish Ck in Dubuque County, Iowa. It was built in 1982, so it is 43 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 5,295 vehicles a day, roughly 8% of them trucks, projected to reach 5,295 by 2043. The structure is 297 ft (90.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNB NW Arterial
CrossesOver Cc RR & Catfish Ck
Location0.2 Mi. N of Jct. US 20
RouteCity Street 0
CountyDubuque County
StateIowa
Coordinates42.49146, -90.73994
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.9 US tons
Inventory rating33.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length297 ft (90.5 m)
Longest span80 ft (24.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,295 (2022)
Projected traffic5,295 by 2043
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 NB NW Arterial over Over Cc RR & Catfish Ck built?

It was built in 1982, making it 43 years old in 2025.

What condition is NB NW Arterial over Over Cc RR & Catfish Ck 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 August 2023.

How much traffic does NB NW Arterial over Over Cc RR & Catfish Ck carry?

About 5,295 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is NB NW Arterial over Over Cc RR & Catfish Ck?

The structure is 297 ft (90.5 m) long with a longest span of 80 ft (24.4 m) and a deck 43 ft wide.

Who owns NB NW Arterial over Over Cc RR & Catfish Ck?

It is owned by the City or Municipal Highway Agency.