US Bridges

Ia 9 over Stream

Fair

Allamakee County, Iowa · 2.1 Mi. W of Jct. Ia 76 · Structure no. 000000000013470

Built
1967
58 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
3,670
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 9 over Stream is a concrete continuous culvert carrying Ia 9 over Stream in Allamakee County, Iowa. It was built in 1967, so it is 58 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 3,670 vehicles a day, roughly 19% of them trucks, projected to reach 3,670 by 2043. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIa 9
CrossesStream
Location2.1 Mi. W of Jct. Ia 76
RouteState Highway 9
CountyAllamakee County
StateIowa
Coordinates43.24058, -91.51562
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length23 ft (7 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 traffic3,670 (2022)
Projected traffic3,670 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Ia 9 over Stream built?

It was built in 1967, making it 58 years old in 2025.

What condition is Ia 9 over Stream 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 2023.

How much traffic does Ia 9 over Stream carry?

About 3,670 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Ia 9 over Stream?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns Ia 9 over Stream?

It is owned by the State Highway Agency.