US Bridges

SD050 over Snatch Ck

Fair

Bon Homme County, South Dakota · 3.3 NW JCT Sd 25 · Structure no. 000000005199135

Built
1956
69 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
143 ft
4 main spans
Daily traffic
2,649
2024 count
Owner
State
State Highway Agency

About this bridge

SD050 over Snatch Ck is a steel stringer/multi-beam or girder carrying SD050 over Snatch Ck in Bon Homme County, South Dakota. It was built in 1956, so it is 69 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.

It carries about 2,649 vehicles a day, roughly 16% of them trucks, projected to reach 3,891 by 2044. The structure is 143 ft (43.7 m) long and 32 ft wide. If it were closed, the detour would be 39.1 mi (63 km).

Location

Open in Google Maps
CarriesSD050
CrossesSnatch Ck
Location3.3 NW JCT Sd 25
RouteState Highway 50
CountyBon Homme County
StateSouth Dakota
Coordinates42.9748, -97.77484
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length143 ft (43.7 m)
Longest span38 ft (11.5 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,649 (2024)
Projected traffic3,891 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.1 mi (63 km)
TollOn a free road
National Highway SystemYes

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 Snatch Ck built?

It was built in 1956, making it 69 years old in 2025.

What condition is SD050 over Snatch 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 March 2023.

How much traffic does SD050 over Snatch Ck carry?

About 2,649 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is SD050 over Snatch Ck?

The structure is 143 ft (43.7 m) long with a longest span of 38 ft (11.5 m) and a deck 32 ft wide.

Who owns SD050 over Snatch Ck?

It is owned by the State Highway Agency.