US Bridges

SD034 over Big Sioux Rv

Fair

Moody County, South Dakota · 2.1 W JCT Sd 13 · Structure no. 000000051129130

Built
1986
39 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
226 ft
4 main spans
Daily traffic
1,888
2024 count
Owner
State
State Highway Agency

About this bridge

SD034 over Big Sioux Rv is a steel continuous stringer/multi-beam or girder carrying SD034 over Big Sioux Rv in Moody County, South Dakota. It was built in 1986, so it is 39 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 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 1,888 vehicles a day, roughly 18% of them trucks, projected to reach 2,405 by 2044. The structure is 226 ft (69 m) long and 39 ft wide. If it were closed, the detour would be 51 mi (82 km).

Location

Open in Google Maps
CarriesSD034
CrossesBig Sioux Rv
Location2.1 W JCT Sd 13
RouteState Highway 34
CountyMoody County
StateSouth Dakota
Coordinates44.0077, -96.62899
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length226 ft (69 m)
Longest span62 ft (19 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,888 (2024)
Projected traffic2,405 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed51 mi (82 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 Big Sioux Rv built?

It was built in 1986, making it 39 years old in 2025.

What condition is SD034 over Big Sioux Rv 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 2024.

How much traffic does SD034 over Big Sioux Rv carry?

About 1,888 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is SD034 over Big Sioux Rv?

The structure is 226 ft (69 m) long with a longest span of 62 ft (19 m) and a deck 39 ft wide.

Who owns SD034 over Big Sioux Rv?

It is owned by the State Highway Agency.