US Bridges

36650 273rd Street over Platte Creek

Good

Charles Mix County, South Dakota · 3.1N & 0.5W of Platte · Structure no. 000000012225049

Built
1990
35 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
48
2022 count
Owner
County
County Highway Agency

About this bridge

36650 273rd Street over Platte Creek is a concrete continuous slab carrying 36650 273rd Street over Platte Creek in Charles Mix County, South Dakota. It was built in 1990, so it is 35 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 7 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 90 by 2032. The structure is 93 ft (28.3 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries36650 273rd Street
CrossesPlatte Creek
Location3.1N & 0.5W of Platte
Coordinates43.42814, -98.85504
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (2022)
Projected traffic90 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 36650 273rd Street over Platte Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is 36650 273rd Street 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 36650 273rd Street over Platte Creek carry?

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

How long is 36650 273rd Street over Platte Creek?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.

Who owns 36650 273rd Street over Platte Creek?

It is owned by the County Highway Agency.