US Bridges

Ia 4 & 7 over Stream

Fair

Pocahontas County, Iowa · At N Jct. Ia 7 · Structure no. 000000000040170

Built
1969
56 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
1,990
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 4 & 7 over Stream is a concrete continuous culvert carrying Ia 4 & 7 over Stream in Pocahontas County, Iowa. It was built in 1969, so it is 56 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 1,990 vehicles a day, roughly 33% of them trucks, projected to reach 1,990 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesIa 4 & 7
CrossesStream
LocationAt N Jct. Ia 7
RouteState Highway 4
CountyPocahontas County
StateIowa
Coordinates42.58816, -94.67808
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 inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating45.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,990 (2022)
Projected traffic1,990 by 2043
Trucks33%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 4 & 7 over Stream built?

It was built in 1969, making it 56 years old in 2025.

What condition is Ia 4 & 7 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 January 2023.

How much traffic does Ia 4 & 7 over Stream carry?

About 1,990 vehicles per day (2022 count), of which roughly 33% are trucks.

How long is Ia 4 & 7 over Stream?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns Ia 4 & 7 over Stream?

It is owned by the State Highway Agency.