US Bridges

Ia 1 over Stream

Good

Johnson County, Iowa · 0.6 Mi. N of SR F52 · Structure no. 000000000031701

Built
2020
5 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
6,300
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 1 over Stream is a concrete culvert carrying Ia 1 over Stream in Johnson County, Iowa. It was built in 2020, so it is 5 years old, younger 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 6,300 vehicles a day, roughly 10% of them trucks, projected to reach 6,300 by 2044. The structure is 32 ft (9.9 m) long. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesIa 1
CrossesStream
Location0.6 Mi. N of SR F52
RouteState Highway 1
CountyJohnson County
StateIowa
Coordinates41.62033, -91.62714
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating48.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length32 ft (9.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,300 (2022)
Projected traffic6,300 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Ia 1 over Stream built?

It was built in 2020, making it 5 years old in 2025.

What condition is Ia 1 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 November 2024.

How much traffic does Ia 1 over Stream carry?

About 6,300 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Ia 1 over Stream?

The structure is 32 ft (9.9 m) long with a longest span of 10 ft (3 m).

Who owns Ia 1 over Stream?

It is owned by the State Highway Agency.