NB US 75 over Stream

Fair

Plymouth County, Iowa · 0.6 Mi. S of SR C60 · Structure no. 000000000039371

Built: 1926; 99 years old, rebuilt 1972
Condition: Fair; inspected March 2024
Type: Slab; Concrete
Length: 26 ft; 1 main span
Daily traffic: 7,450; 2022 count
Owner: State; State Highway Agency

About this bridge

NB US 75 over Stream is a concrete slab carrying NB US 75 over Stream in Plymouth County, Iowa. It was built in 1926 and reconstructed in 1972, so it is 99 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 7,450 vehicles a day, roughly 18% of them trucks, projected to reach 7,450 by 2044. The structure is 26 ft (7.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNB US 75

CrossesStream

Location0.6 Mi. S of SR C60

RouteU.S. Route 75

CountyPlymouth County

StateIowa

Coordinates42.61838, -96.2942

Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionMarch 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation6: Equal to present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating98.7 US tons

Inventory rating59.2 US tons

Structure

Structure typeSlab

MaterialConcrete

DeckConcrete, cast-in-place

Main spans1

Design loadHS 20

Structure length26 ft (7.9 m)

Longest span24 ft (7.3 m)

Deck width43 ft (13.1 m)

Roadway width40 ft (12.2 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,450 (2022)

Projected traffic7,450 by 2044

Trucks18%

Lanes on structure2

Traffic directionOne-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.2 mi (2 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 NB US 75 over Stream built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1972.

What condition is NB US 75 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 March 2024.

How much traffic does NB US 75 over Stream carry?

About 7,450 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is NB US 75 over Stream?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 43 ft wide.

Who owns NB US 75 over Stream?

It is owned by the State Highway Agency.