US Bridges

247 ST over West Firesteel Ck

Fair

Aurora County, South Dakota · 6.3E 6N Plankinton · Structure no. 000000002223090

Built
1982
43 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
105 ft
3 main spans
Daily traffic
65
2022 count
Owner
County
County Highway Agency

About this bridge

247 ST over West Firesteel Ck is a prestressed concrete tee beam carrying 247 ST over West Firesteel Ck in Aurora County, South Dakota. It was built in 1982, so it is 43 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 65 vehicles a day, roughly 3% of them trucks, projected to reach 65 by 2032. The structure is 105 ft (32 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries247 ST
CrossesWest Firesteel Ck
Location6.3E 6N Plankinton
RouteCounty Highway 0
Coordinates43.80453, -98.35977
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.2 US tons
Inventory rating21.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length105 ft (32 m)
Longest span45 ft (13.7 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (2022)
Projected traffic65 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 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 247 ST over West Firesteel Ck built?

It was built in 1982, making it 43 years old in 2025.

What condition is 247 ST 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 July 2023.

How much traffic does 247 ST over West Firesteel Ck carry?

About 65 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 247 ST over West Firesteel Ck?

The structure is 105 ft (32 m) long with a longest span of 45 ft (13.7 m) and a deck 31 ft wide.

Who owns 247 ST over West Firesteel Ck?

It is owned by the County Highway Agency.