US Bridges

Ia 9 over Stream

Fair

Lyon County, Iowa · 200 Ft. S of Jct. SR K12 · Structure no. 000000000034560

Built
1940
85 years old, rebuilt 1986
Condition
Fair
inspected February 2024
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
4,520
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 Lyon County, Iowa. It was built in 1940 and reconstructed in 1986, so it is 85 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 4,520 vehicles a day, roughly 9% of them trucks, projected to reach 4,520 by 2044. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 9
CrossesStream
Location200 Ft. S of Jct. SR K12
RouteState Highway 9
CountyLyon County
StateIowa
Coordinates43.47751, -96.50532
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,520 (2022)
Projected traffic4,520 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 1940, making it 85 years old in 2025. It was reconstructed in 1986.

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 February 2024.

How much traffic does Ia 9 over Stream carry?

About 4,520 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Ia 9 over Stream?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m).

Who owns Ia 9 over Stream?

It is owned by the State Highway Agency.