US Bridges

US 52 over Maquoketa River

Fair

Jackson County, Iowa · 3.2 Mi. S of Jct. SR Z34 · Structure no. 000000000030020

Built
1956
69 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
714 ft
7 main spans
Daily traffic
920
2022 count
Owner
State
State Highway Agency

About this bridge

US 52 over Maquoketa River is a steel continuous stringer/multi-beam or girder carrying US 52 over Maquoketa River in Jackson County, Iowa. It was built in 1956, so it is 69 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 920 vehicles a day, roughly 17% of them trucks, projected to reach 920 by 2044. The structure is 714 ft (217.6 m) long and 34 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesUS 52
CrossesMaquoketa River
Location3.2 Mi. S of Jct. SR Z34
RouteU.S. Route 52
CountyJackson County
StateIowa
Coordinates42.16273, -90.33423
Functional classRural Minor 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32 US tons
Inventory rating19.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadH 20
Structure length714 ft (217.6 m)
Longest span160 ft (48.8 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic920 (2022)
Projected traffic920 by 2044
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 km)
TollOn a free road
National Highway SystemNo

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 Maquoketa River built?

It was built in 1956, making it 69 years old in 2025.

What condition is US 52 over 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 October 2024.

How much traffic does US 52 over Maquoketa River carry?

About 920 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is US 52 over Maquoketa River?

The structure is 714 ft (217.6 m) long with a longest span of 160 ft (48.8 m) and a deck 34 ft wide.

Who owns US 52 over Maquoketa River?

It is owned by the State Highway Agency.