US Bridges

SB US 75 over Stream

Fair

Plymouth County, Iowa · 1.3 Mi. N of SR C70 · Structure no. 000000000039330

Built
1948
77 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
7,500
2022 count
Owner
State
State Highway Agency

About this bridge

SB US 75 over Stream is a concrete slab carrying SB US 75 over Stream in Plymouth County, Iowa. It was built in 1948, so it is 77 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 5 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 7,500 vehicles a day, roughly 18% of them trucks, projected to reach 7,500 by 2044. The structure is 28 ft (8.5 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB US 75
CrossesStream
Location1.3 Mi. N of SR C70
RouteU.S. Route 75
CountyPlymouth County
StateIowa
Coordinates42.59408, -96.30523
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.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2022)
Projected traffic7,500 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 SB US 75 over Stream built?

It was built in 1948, making it 77 years old in 2025.

What condition is SB 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 February 2024.

How much traffic does SB US 75 over Stream carry?

About 7,500 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is SB US 75 over Stream?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.

Who owns SB US 75 over Stream?

It is owned by the State Highway Agency.