US Bridges

D57 Mill Creek RD over Small Stream

Good

Jackson County, Iowa · 086E40603 · Structure no. 000000000194502

Built
2020
5 years old
Condition
Good
inspected November 2022
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
128
2022 count
Owner
County
County Highway Agency

About this bridge

D57 Mill Creek RD over Small Stream is a concrete continuous slab carrying D57 Mill Creek RD over Small Stream in Jackson County, Iowa. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 128 vehicles a day, projected to reach 128 by 2043. The structure is 80 ft (24.4 m) long and 33 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesD57 Mill Creek RD
CrossesSmall Stream
Location086E40603
RouteCounty Highway 0
CountyJackson County
StateIowa
Coordinates42.28304, -90.54535
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span31 ft (9.4 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic128 (2022)
Projected traffic128 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 D57 Mill Creek RD over Small Stream built?

It was built in 2020, making it 5 years old in 2025.

What condition is D57 Mill Creek RD over Small Stream 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 November 2022.

How much traffic does D57 Mill Creek RD over Small Stream carry?

About 128 vehicles per day (2022 count).

How long is D57 Mill Creek RD over Small Stream?

The structure is 80 ft (24.4 m) long with a longest span of 31 ft (9.4 m) and a deck 33 ft wide.

Who owns D57 Mill Creek RD over Small Stream?

It is owned by the County Highway Agency.