US Bridges

SD044 over Platte Ck

Fair

Charles Mix County, South Dakota · 2.4 W JCT Sd 45 N · Structure no. 000000012207080

Built
1964
61 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
163 ft
5 main spans
Daily traffic
2,420
2024 count
Owner
State
State Highway Agency

About this bridge

SD044 over Platte Ck is a concrete continuous slab carrying SD044 over Platte Ck in Charles Mix County, South Dakota. It was built in 1964, so it is 61 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 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 2,420 vehicles a day, roughly 16% of them trucks, projected to reach 3,492 by 2044. The structure is 163 ft (49.7 m) long and 34 ft wide. If it were closed, the detour would be 62.8 mi (101 km).

CarriesSD044
CrossesPlatte Ck
Location2.4 W JCT Sd 45 N
RouteState Highway 44
Coordinates43.38257, -98.88997
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.3 US tons
Inventory rating39.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span32 ft (9.9 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,420 (2024)
Projected traffic3,492 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.8 mi (101 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SD044 over Platte Ck built?

It was built in 1964, making it 61 years old in 2025.

What condition is SD044 over Platte 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 May 2023.

How much traffic does SD044 over Platte Ck carry?

About 2,420 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is SD044 over Platte Ck?

The structure is 163 ft (49.7 m) long with a longest span of 32 ft (9.9 m) and a deck 34 ft wide.

Who owns SD044 over Platte Ck?

It is owned by the State Highway Agency.