US Bridges

Iris Ave over Mitchell Creek

GoodPosted for load

Jefferson County, Iowa · 072101608 · Structure no. 000000000201451

Built
2023
2 years old
Condition
Good
inspected February 2024
Type
Other
Steel
Length
67 ft
1 main span
Daily traffic
80
2022 count
Owner
County
County Highway Agency

About this bridge

Iris Ave over Mitchell Creek is a steel other carrying Iris Ave over Mitchell Creek in Jefferson County, Iowa. It was built in 2023, so it is 2 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. Its operating status is: posted for load restriction.

It carries about 80 vehicles a day, roughly 10% of them trucks, projected to reach 80 by 2044. The structure is 67 ft (20.4 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIris Ave
CrossesMitchell Creek
Location072101608
RouteCounty Highway 0
CountyJefferson County
StateIowa
Coordinates41.03579, -92.02381
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
Deck9 ExcellentNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.3 US tons
Inventory rating23.6 US tons

Structure

Structure typeOther
MaterialSteel
DeckSteel plate
Main spans1
Design loadOther
Structure length67 ft (20.4 m)
Longest span66 ft (20.1 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic80 by 2044
Trucks10%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Iris Ave over Mitchell Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is Iris Ave over Mitchell Creek 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 February 2024.

How much traffic does Iris Ave over Mitchell Creek carry?

About 80 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Iris Ave over Mitchell Creek?

The structure is 67 ft (20.4 m) long with a longest span of 66 ft (20.1 m) and a deck 27 ft wide.

Who owns Iris Ave over Mitchell Creek?

It is owned by the County Highway Agency.