US Bridges

SD034 over Mush Ck

Fair

Hughes County, South Dakota · 7.3 E JCT US 14 & 83 · Structure no. 000000033178141

Built
1954
71 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
152 ft
5 main spans
Daily traffic
1,578
2024 count
Owner
State
State Highway Agency

About this bridge

SD034 over Mush Ck is a concrete continuous slab carrying SD034 over Mush Ck in Hughes County, South Dakota. It was built in 1954, so it is 71 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 1,578 vehicles a day, roughly 5% of them trucks, projected to reach 2,271 by 2044. The structure is 152 ft (46.3 m) long and 34 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

CarriesSD034
CrossesMush Ck
Location7.3 E JCT US 14 & 83
RouteState Highway 34
Coordinates44.33684, -100.21217
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.9 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length152 ft (46.3 m)
Longest span31 ft (9.3 m)
Deck width34 ft (10.5 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 Mush Ck built?

It was built in 1954, making it 71 years old in 2025.

What condition is SD034 over Mush 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 Mush Ck carry?

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

How long is SD034 over Mush Ck?

The structure is 152 ft (46.3 m) long with a longest span of 31 ft (9.3 m) and a deck 34 ft wide.

Who owns SD034 over Mush Ck?

It is owned by the State Highway Agency.