US Bridges

Ia 3 over Stream

Good

Dubuque County, Iowa · 0.1 Mi. S of Jct. SR D10 · Structure no. 000000000023991

Built
1974
51 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete Continuous
Length
94 ft
3 main spans
Daily traffic
5,100
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 3 over Stream is a concrete continuous slab carrying Ia 3 over Stream in Dubuque County, Iowa. It was built in 1974, so it is 51 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,100 vehicles a day, roughly 5% of them trucks, projected to reach 5,100 by 2042. The structure is 94 ft (28.7 m) long and 72 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIa 3
CrossesStream
Location0.1 Mi. S of Jct. SR D10
RouteState Highway 3
StateIowa
Coordinates42.55727, -90.7094
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length94 ft (28.7 m)
Longest span35 ft (10.7 m)
Deck width72 ft (21.8 m)
Roadway width68 ft (20.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,100 (2022)
Projected traffic5,100 by 2042
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 3 over Stream built?

It was built in 1974, making it 51 years old in 2025.

What condition is Ia 3 over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Ia 3 over Stream carry?

About 5,100 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Ia 3 over Stream?

The structure is 94 ft (28.7 m) long with a longest span of 35 ft (10.7 m) and a deck 72 ft wide.

Who owns Ia 3 over Stream?

It is owned by the State Highway Agency.