US Bridges

48580 County RD 13 over Big Sioux Rv

Fair

Union County, South Dakota · 6.5E & 1.9S Alcester · Structure no. 000000064158059

Built
1979
46 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
580 ft
5 main spans
Daily traffic
500
2022 count
Owner
County
County Highway Agency

About this bridge

48580 County RD 13 over Big Sioux Rv is a steel continuous stringer/multi-beam or girder carrying 48580 County RD 13 over Big Sioux Rv in Union County, South Dakota. It was built in 1979, so it is 46 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 500 vehicles a day, roughly 3% of them trucks, projected to reach 500 by 2032. The structure is 580 ft (176.7 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
Carries48580 County RD 13
CrossesBig Sioux Rv
Location6.5E & 1.9S Alcester
RouteCounty Highway 0
CountyUnion County
StateSouth Dakota
Coordinates42.99762, -96.49754
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.8 US tons
Inventory rating34.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length580 ft (176.7 m)
Longest span125 ft (38.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic500 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 48580 County RD 13 over Big Sioux Rv built?

It was built in 1979, making it 46 years old in 2025.

What condition is 48580 County RD 13 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 September 2024.

How much traffic does 48580 County RD 13 over Big Sioux Rv carry?

About 500 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 48580 County RD 13 over Big Sioux Rv?

The structure is 580 ft (176.7 m) long with a longest span of 125 ft (38.1 m) and a deck 35 ft wide.

Who owns 48580 County RD 13 over Big Sioux Rv?

It is owned by the County Highway Agency.