US Bridges

SD048 over Big Sioux Rv

Fair

Union County, South Dakota · Sd/Ia Border - Akron · Structure no. 000000064122170

Built
1996
29 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
490 ft
4 main spans
Daily traffic
—
2023 count
Owner
State
State Highway Agency

About this bridge

SD048 over Big Sioux Rv is a prestressed concrete stringer/multi-beam or girder carrying SD048 over Big Sioux Rv in Union County, South Dakota. It was built in 1996, so it is 29 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.

No traffic count is recorded. The structure is 490 ft (149.3 m) long and 39 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSD048
CrossesBig Sioux Rv
LocationSd/Ia Border - Akron
RouteState Highway 48
CountyUnion County
StateSouth Dakota
Coordinates42.83714, -96.56148
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.7 US tons
Inventory rating56.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length490 ft (149.3 m)
Longest span121 ft (37 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 SD048 over Big Sioux Rv built?

It was built in 1996, making it 29 years old in 2025.

What condition is SD048 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 June 2023.

How much traffic does SD048 over Big Sioux Rv carry?

No traffic count is recorded for this structure.

How long is SD048 over Big Sioux Rv?

The structure is 490 ft (149.3 m) long with a longest span of 121 ft (37 m) and a deck 39 ft wide.

Who owns SD048 over Big Sioux Rv?

It is owned by the State Highway Agency.