US Bridges

SD034 over North Plum Ck

Fair

Haakon County, South Dakota · 9.1 W Stanley CO Line · Structure no. 000000028331260

Built
1959
66 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
205 ft
3 main spans
Daily traffic
400
2024 count
Owner
State
State Highway Agency

About this bridge

SD034 over North Plum Ck is a steel continuous stringer/multi-beam or girder carrying SD034 over North Plum Ck in Haakon County, South Dakota. It was built in 1959, so it is 66 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 400 vehicles a day, roughly 18% of them trucks, projected to reach 568 by 2044. The structure is 205 ft (62.6 m) long and 32 ft wide. If it were closed, the detour would be 44.1 mi (71 km).

CarriesSD034
CrossesNorth Plum Ck
Location9.1 W Stanley CO Line
RouteState Highway 34
Coordinates44.37262, -101.33566
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.4 US tons
Inventory rating39.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length205 ft (62.6 m)
Longest span79 ft (24.2 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2024)
Projected traffic568 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.1 mi (71 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SD034 over North Plum Ck built?

It was built in 1959, making it 66 years old in 2025.

What condition is SD034 over North Plum 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 January 2024.

How much traffic does SD034 over North Plum Ck carry?

About 400 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is SD034 over North Plum Ck?

The structure is 205 ft (62.6 m) long with a longest span of 79 ft (24.2 m) and a deck 32 ft wide.

Who owns SD034 over North Plum Ck?

It is owned by the State Highway Agency.