US Bridges

470th ST over W Fork Little Sioux Rive

Good

Cherokee County, Iowa · 093423601 · Structure no. 000000000110031

Built
2022
3 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

470th ST over W Fork Little Sioux Rive is a concrete continuous culvert carrying 470th ST over W Fork Little Sioux Rive in Cherokee County, Iowa. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, projected to reach 20 by 2043. The structure is 39 ft (11.9 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries470th ST
CrossesW Fork Little Sioux Rive
Location093423601
RouteCounty Highway 0
CountyCherokee County
StateIowa
Coordinates42.8374, -95.74406
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating36.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHL 93
Structure length39 ft (11.9 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 traffic20 (2022)
Projected traffic20 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 470th ST over W Fork Little Sioux Rive built?

It was built in 2022, making it 3 years old in 2025.

What condition is 470th ST over W Fork Little Sioux Rive 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 470th ST over W Fork Little Sioux Rive carry?

About 20 vehicles per day (2022 count).

How long is 470th ST over W Fork Little Sioux Rive?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m).

Who owns 470th ST over W Fork Little Sioux Rive?

It is owned by the County Highway Agency.