US Bridges

SD050 over American Ck

Good

Brule County, South Dakota · 0.5 N JCT I 90 Loop · Structure no. 000000008074081

Built
1999
26 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
281 ft
3 main spans
Daily traffic
3,113
2024 count
Owner
State
State Highway Agency

About this bridge

SD050 over American Ck is a prestressed concrete continuous stringer/multi-beam or girder carrying SD050 over American Ck in Brule County, South Dakota. It was built in 1999, so it is 26 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 3,113 vehicles a day, roughly 4% of them trucks, projected to reach 4,038 by 2044. The structure is 281 ft (85.6 m) long and 64 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesSD050
CrossesAmerican Ck
Location0.5 N JCT I 90 Loop
RouteState Highway 50
Coordinates43.81537, -99.32753
Functional classRural Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.3 US tons
Inventory rating51.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length281 ft (85.6 m)
Longest span96 ft (29.3 m)
Deck width64 ft (19.4 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,113 (2024)
Projected traffic4,038 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed21.7 mi (35 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 SD050 over American Ck built?

It was built in 1999, making it 26 years old in 2025.

What condition is SD050 over American Ck 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 December 2023.

How much traffic does SD050 over American Ck carry?

About 3,113 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is SD050 over American Ck?

The structure is 281 ft (85.6 m) long with a longest span of 96 ft (29.3 m) and a deck 64 ft wide.

Who owns SD050 over American Ck?

It is owned by the State Highway Agency.