US Bridges

27380 366th Avenue over Platte Creek

Good

Charles Mix County, South Dakota · 2.2N & 1.0W of Platte · Structure no. 000000012220058

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
48
2022 count
Owner
County
County Highway Agency

About this bridge

27380 366th Avenue over Platte Creek is a steel stringer/multi-beam or girder carrying 27380 366th Avenue over Platte Creek in Charles Mix County, South Dakota. It was built in 2019, so it is 6 years old, younger than the South Dakota average of 48.9 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 48 vehicles a day, roughly 2% of them trucks, projected to reach 48 by 2032. The structure is 80 ft (24.5 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries27380 366th Avenue
CrossesPlatte Creek
Location2.2N & 1.0W of Platte
RouteCounty Highway 0
Coordinates43.41477, -98.86478
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.9 US tons
Inventory rating28.5 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length80 ft (24.5 m)
Longest span79 ft (24.1 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (2022)
Projected traffic48 by 2032
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 27380 366th Avenue over Platte Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is 27380 366th Avenue over Platte 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 October 2023.

How much traffic does 27380 366th Avenue over Platte Creek carry?

About 48 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 27380 366th Avenue over Platte Creek?

The structure is 80 ft (24.5 m) long with a longest span of 79 ft (24.1 m) and a deck 25 ft wide.

Who owns 27380 366th Avenue over Platte Creek?

It is owned by the County Highway Agency.