US Bridges

386 Ave over West Firesteel Ck

FairPosted for load

Aurora County, South Dakota · 9.1 N Plankinton · Structure no. 000000002160059

Built
1930
95 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
2 main spans
Daily traffic
53
2022 count
Owner
County
County Highway Agency

About this bridge

386 Ave over West Firesteel Ck is a steel stringer/multi-beam or girder carrying 386 Ave over West Firesteel Ck in Aurora County, South Dakota. It was built in 1930, so it is 95 years old, older than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 53 vehicles a day, roughly 3% of them trucks, projected to reach 53 by 2032. The structure is 52 ft (15.8 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries386 Ave
CrossesWest Firesteel Ck
Location9.1 N Plankinton
RouteCounty Highway 0
CountyAurora County
StateSouth Dakota
Coordinates43.85006, -98.49146
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.2 US tons
Inventory rating20.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length52 ft (15.8 m)
Longest span25 ft (7.6 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53 (2022)
Projected traffic53 by 2032
Trucks3%
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 statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$223,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 386 Ave over West Firesteel Ck built?

It was built in 1930, making it 95 years old in 2025.

What condition is 386 Ave over West Firesteel Ck in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does 386 Ave over West Firesteel Ck carry?

About 53 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 386 Ave over West Firesteel Ck?

The structure is 52 ft (15.8 m) long with a longest span of 25 ft (7.6 m) and a deck 20 ft wide.

Who owns 386 Ave over West Firesteel Ck?

It is owned by the County Highway Agency.