US Bridges

SD034 over Medicine Knoll Ck

Fair

Hughes County, South Dakota · 14.3 E JCT US 14 & 83 · Structure no. 000000033246153

Built
1964
61 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
284 ft
3 main spans
Daily traffic
1,578
2024 count
Owner
State
State Highway Agency

About this bridge

SD034 over Medicine Knoll Ck is a steel continuous stringer/multi-beam or girder carrying SD034 over Medicine Knoll Ck in Hughes 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 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 1,578 vehicles a day, roughly 5% of them trucks, projected to reach 2,271 by 2044. The structure is 284 ft (86.6 m) long and 32 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

Open in Google Maps
CarriesSD034
CrossesMedicine Knoll Ck
Location14.3 E JCT US 14 & 83
RouteState Highway 34
CountyHughes County
StateSouth Dakota
Coordinates44.31848, -100.07515
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.7 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length284 ft (86.6 m)
Longest span110 ft (33.5 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,578 (2024)
Projected traffic2,271 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 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 SD034 over Medicine Knoll Ck built?

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

What condition is SD034 over Medicine Knoll 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 SD034 over Medicine Knoll Ck carry?

About 1,578 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is SD034 over Medicine Knoll Ck?

The structure is 284 ft (86.6 m) long with a longest span of 110 ft (33.5 m) and a deck 32 ft wide.

Who owns SD034 over Medicine Knoll Ck?

It is owned by the State Highway Agency.