US Bridges

LOCAL-480th ST over West Fork Little Sioux

Good

Cherokee County, Iowa · 092420101 · Structure no. 000000000109221

Built
2002
23 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
71
2022 count
Owner
County
County Highway Agency

About this bridge

LOCAL-480th ST over West Fork Little Sioux is a prestressed concrete tee beam carrying LOCAL-480th ST over West Fork Little Sioux in Cherokee County, Iowa. It was built in 2002, so it is 23 years old, younger 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 71 vehicles a day, projected to reach 71 by 2043. The structure is 51 ft (15.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLOCAL-480th ST
CrossesWest Fork Little Sioux
Location092420101
RouteCounty Highway 0
StateIowa
Coordinates42.82278, -95.75187
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating39.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span50 ft (15.2 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2022)
Projected traffic71 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-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 statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was LOCAL-480th ST over West Fork Little Sioux built?

It was built in 2002, making it 23 years old in 2025.

What condition is LOCAL-480th ST over West Fork Little Sioux 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 August 2023.

How much traffic does LOCAL-480th ST over West Fork Little Sioux carry?

About 71 vehicles per day (2022 count).

How long is LOCAL-480th ST over West Fork Little Sioux?

The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 32 ft wide.

Who owns LOCAL-480th ST over West Fork Little Sioux?

It is owned by the County Highway Agency.