US Bridges

S41 Mallard Ave over Dd No 6

Good

Franklin County, Iowa · 91213102 · Structure no. 000000000157051

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
1,277
2022 count
Owner
County
County Highway Agency

About this bridge

S41 Mallard Ave over Dd No 6 is a concrete continuous slab carrying S41 Mallard Ave over Dd No 6 in Franklin County, Iowa. It was built in 2021, so it is 4 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 1,277 vehicles a day, projected to reach 1,277 by 2043. The structure is 90 ft (27.4 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS41 Mallard Ave
CrossesDd No 6
Location91213102
RouteCounty Highway 0
CountyFranklin County
StateIowa
Coordinates42.6535, -93.26174
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length90 ft (27.4 m)
Longest span35 ft (10.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,277 (2022)
Projected traffic1,277 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 S41 Mallard Ave over Dd No 6 built?

It was built in 2021, making it 4 years old in 2025.

What condition is S41 Mallard Ave over Dd No 6 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 2023.

How much traffic does S41 Mallard Ave over Dd No 6 carry?

About 1,277 vehicles per day (2022 count).

How long is S41 Mallard Ave over Dd No 6?

The structure is 90 ft (27.4 m) long with a longest span of 35 ft (10.7 m) and a deck 43 ft wide.

Who owns S41 Mallard Ave over Dd No 6?

It is owned by the County Highway Agency.