Local over Sm Stream

FairPosted for load

Sioux County, Iowa · 097470101 · Structure no. 000000000313080

Built: 1900; 125 years old
Condition: Fair; inspected December 2023
Type: Tee Beam; Concrete
Length: 32 ft; 1 main span
Daily traffic: 34; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Sm Stream is a concrete tee beam carrying Local over Sm Stream in Sioux County, Iowa. It was built in 1900, so it is 125 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. Its operating status is: posted for load restriction.

It carries about 34 vehicles a day, projected to reach 34 by 2043. The structure is 32 ft (9.8 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesLocal

CrossesSm Stream

Location097470101

RouteCounty Highway 0

CountySioux County

StateIowa

Coordinates43.25777, -96.34491

Functional classRural Local

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	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionDecember 2023

Inspection intervalevery 24 months

Operating statusPosted for load restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating31.7 US tons

Inventory rating19.3 US tons

Structure

Structure typeTee Beam

MaterialConcrete

DeckConcrete, cast-in-place

Main spans1

Design loadUnknown

Structure length32 ft (9.8 m)

Longest span30 ft (9.1 m)

Deck width20 ft (6.1 m)

Roadway width18 ft (5.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)

Projected traffic34 by 2043

Trucks0%

Lanes on structure2

Traffic directionOne-lane bridge for two-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.9 mi (3 km)

TollOn a free road

National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency

Maintained byCounty Highway Agency

Historic statusPossibly eligible for the National Register; requires further investigation

Work proposedRehabilitation because of general structure deterioration or inadequate strength

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Sm Stream built?

It was built in 1900, making it 125 years old in 2025.

What condition is Local over Sm 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 December 2023.

How much traffic does Local over Sm Stream carry?

About 34 vehicles per day (2022 count).

How long is Local over Sm Stream?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 20 ft wide.

Who owns Local over Sm Stream?

It is owned by the County Highway Agency.