US Bridges

J34 220th ST over Mule Slough

Good

Fremont County, Iowa · 068430705 · Structure no. 000000000159581

Built
2018
7 years old
Condition
Good
inspected May 2021
Type
Slab
Concrete Continuous
Length
71 ft
3 main spans
Daily traffic
210
2022 count
Owner
County
County Highway Agency

About this bridge

J34 220th ST over Mule Slough is a concrete continuous slab carrying J34 220th ST over Mule Slough in Fremont County, Iowa. It was built in 2018, so it is 7 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 210 vehicles a day, roughly 11% of them trucks, projected to reach 210 by 2043. The structure is 71 ft (21.6 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesJ34 220th ST
CrossesMule Slough
Location068430705
RouteCounty Highway 0
StateIowa
Coordinates40.72592, -95.81147
Functional classRural Major Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating52.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length71 ft (21.6 m)
Longest span28 ft (8.5 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2022)
Projected traffic210 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was J34 220th ST over Mule Slough built?

It was built in 2018, making it 7 years old in 2025.

What condition is J34 220th ST over Mule Slough 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 May 2021.

How much traffic does J34 220th ST over Mule Slough carry?

About 210 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is J34 220th ST over Mule Slough?

The structure is 71 ft (21.6 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.

Who owns J34 220th ST over Mule Slough?

It is owned by the County Highway Agency.