US Bridges

US 52 over N Fork Maquoketa River

Fair

Dubuque County, Iowa · 0.1 Mi. S of Jct. SR C64 · Structure no. 000000000024181

Built
1985
40 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
3 main spans
Daily traffic
3,990
2022 count
Owner
State
State Highway Agency

About this bridge

US 52 over N Fork Maquoketa River is a prestressed concrete stringer/multi-beam or girder carrying US 52 over N Fork Maquoketa River in Dubuque County, Iowa. It was built in 1985, so it is 40 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 3,990 vehicles a day, roughly 11% of them trucks, projected to reach 3,990 by 2044. The structure is 180 ft (54.9 m) long and 49 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesUS 52
CrossesN Fork Maquoketa River
Location0.1 Mi. S of Jct. SR C64
RouteU.S. Route 52
CountyDubuque County
StateIowa
Coordinates42.54629, -91.11422
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating74.7 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span61 ft (18.6 m)
Deck width49 ft (14.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,990 (2022)
Projected traffic3,990 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.9 mi (32 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 52 over N Fork Maquoketa River built?

It was built in 1985, making it 40 years old in 2025.

What condition is US 52 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 November 2024.

How much traffic does US 52 over N Fork Maquoketa River carry?

About 3,990 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is US 52 over N Fork Maquoketa River?

The structure is 180 ft (54.9 m) long with a longest span of 61 ft (18.6 m) and a deck 49 ft wide.

Who owns US 52 over N Fork Maquoketa River?

It is owned by the State Highway Agency.