US Bridges

Ia 62 over Maquoketa River

Fair

Jackson County, Iowa · 1.1 Mi. E of Jct. Ia 64 · Structure no. 000000000030210

Built
1957
68 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
654 ft
5 main spans
Daily traffic
2,030
2021 count
Owner
State
State Highway Agency

About this bridge

Ia 62 over Maquoketa River is a steel continuous stringer/multi-beam or girder carrying Ia 62 over Maquoketa River in Jackson County, Iowa. It was built in 1957, so it is 68 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 2,030 vehicles a day, roughly 9% of them trucks, projected to reach 2,030 by 2044. The structure is 654 ft (199.3 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIa 62
CrossesMaquoketa River
Location1.1 Mi. E of Jct. Ia 64
RouteState Highway 62
CountyJackson County
StateIowa
Coordinates42.08346, -90.63296
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.7 US tons
Inventory rating29.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length654 ft (199.3 m)
Longest span160 ft (48.8 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,030 (2021)
Projected traffic2,030 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Ia 62 over Maquoketa River built?

It was built in 1957, making it 68 years old in 2025.

What condition is Ia 62 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 Ia 62 over Maquoketa River carry?

About 2,030 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Ia 62 over Maquoketa River?

The structure is 654 ft (199.3 m) long with a longest span of 160 ft (48.8 m) and a deck 33 ft wide.

Who owns Ia 62 over Maquoketa River?

It is owned by the State Highway Agency.