US Bridges

SD019 over Missouri River/County RD

Fair

Clay County, South Dakota · 4.1 S. of Vermillion · Structure no. 000000014104249

Built
2001
24 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,455 ft
12 main spans
Daily traffic
1,609
2024 count
Owner
State
State Highway Agency

About this bridge

SD019 over Missouri River/County RD is a steel continuous stringer/multi-beam or girder carrying SD019 over Missouri River/County RD in Clay County, South Dakota. It was built in 2001, so it is 24 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 1,609 vehicles a day, roughly 13% of them trucks, projected to reach 2,640 by 2044. The structure is 2,455 ft (748.4 m) long and 38 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

Location

Open in Google Maps
CarriesSD019
CrossesMissouri River/County RD
Location4.1 S. of Vermillion
RouteState Highway 19
CountyClay County
StateSouth Dakota
Coordinates42.72204, -96.9491
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating77.1 US tons
Inventory rating46.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadHS 25 or greater
Structure length2,455 ft (748.4 m)
Longest span228 ft (69.6 m)
Deck width38 ft (11.5 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,609 (2024)
Projected traffic2,640 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed60.3 mi (97 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SD019 over Missouri River/County RD built?

It was built in 2001, making it 24 years old in 2025.

What condition is SD019 over Missouri River/County RD 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 October 2023.

How much traffic does SD019 over Missouri River/County RD carry?

About 1,609 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is SD019 over Missouri River/County RD?

The structure is 2,455 ft (748.4 m) long with a longest span of 228 ft (69.6 m) and a deck 38 ft wide.

Who owns SD019 over Missouri River/County RD?

It is owned by the State Highway Agency.