US Bridges

400th ST over Cylinder Creek (dd 80)

Good

Palo Alto County, Iowa · 095321203 · Structure no. 000000000269241

Built
2024
1 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
52
2023 count
Owner
County
County Highway Agency

About this bridge

400th ST over Cylinder Creek (dd 80) is a concrete continuous slab carrying 400th ST over Cylinder Creek (dd 80) in Palo Alto County, Iowa. It was built in 2024, so it is 1 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 52 vehicles a day, projected to reach 52 by 2044. The structure is 93 ft (28.3 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries400th ST
CrossesCylinder Creek (dd 80)
Location095321203
RouteCounty Highway 0
CountyPalo Alto County
StateIowa
Coordinates43.06759, -94.56459
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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52 (2023)
Projected traffic52 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 400th ST over Cylinder Creek (dd 80) built?

It was built in 2024, making it 1 years old in 2025.

What condition is 400th ST over Cylinder Creek (dd 80) 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 2024.

How much traffic does 400th ST over Cylinder Creek (dd 80) carry?

About 52 vehicles per day (2023 count).

How long is 400th ST over Cylinder Creek (dd 80)?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 33 ft wide.

Who owns 400th ST over Cylinder Creek (dd 80)?

It is owned by the County Highway Agency.