US Bridges

Ia 330 over Stream

Good

Marshall County, Iowa · 0.7 Miles N of JCT SR E35 · Structure no. 000000000243480

Built
1970
55 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
2,780
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 330 over Stream is a concrete continuous culvert carrying Ia 330 over Stream in Marshall County, Iowa. It was built in 1970, so it is 55 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 2,780 vehicles a day, roughly 11% of them trucks, projected to reach 2,780 by 2044. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesIa 330
CrossesStream
Location0.7 Miles N of JCT SR E35
RouteState Highway 330
CountyMarshall County
StateIowa
Coordinates42.05931, -93.00028
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 spans3
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,780 (2022)
Projected traffic2,780 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 330 over Stream built?

It was built in 1970, making it 55 years old in 2025.

What condition is Ia 330 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 June 2024.

How much traffic does Ia 330 over Stream carry?

About 2,780 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Ia 330 over Stream?

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Ia 330 over Stream?

It is owned by the State Highway Agency.