US Bridges

L-22 over W Fork Little Sioux Riv

Good

Plymouth County, Iowa · 093432502 · Structure no. 000000000276135

Built
1974
51 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
210
2022 count
Owner
County
County Highway Agency

About this bridge

L-22 over W Fork Little Sioux Riv is a concrete continuous culvert carrying L-22 over W Fork Little Sioux Riv in Plymouth County, Iowa. It was built in 1974, so it is 51 years old, older 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 210 vehicles a day, roughly 15% of them trucks, projected to reach 210 by 2044. The structure is 21 ft (6.4 m) long.

CarriesL-22
CrossesW Fork Little Sioux Riv
Location093432502
RouteCounty Highway 0
StateIowa
Coordinates42.85164, -95.87844
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2022)
Projected traffic210 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was L-22 over W Fork Little Sioux Riv built?

It was built in 1974, making it 51 years old in 2025.

What condition is L-22 over W Fork Little Sioux Riv 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 April 2023.

How much traffic does L-22 over W Fork Little Sioux Riv carry?

About 210 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is L-22 over W Fork Little Sioux Riv?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns L-22 over W Fork Little Sioux Riv?

It is owned by the County Highway Agency.