US Bridges

SD028 over Big Sioux Rv

Fair

Hamlin County, South Dakota · 2.3 W Deuel CO Line · Structure no. 000000029277160

Built
1951
74 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
163 ft
3 main spans
Daily traffic
1,371
2024 count
Owner
State
State Highway Agency

About this bridge

SD028 over Big Sioux Rv is a steel stringer/multi-beam or girder carrying SD028 over Big Sioux Rv in Hamlin County, South Dakota. It was built in 1951, so it is 74 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 1,371 vehicles a day, roughly 21% of them trucks, projected to reach 2,063 by 2044. The structure is 163 ft (49.8 m) long and 32 ft wide. If it were closed, the detour would be 28 mi (45 km).

Location

Open in Google Maps
CarriesSD028
CrossesBig Sioux Rv
Location2.3 W Deuel CO Line
RouteState Highway 28
CountyHamlin County
StateSouth Dakota
Coordinates44.57286, -96.93017
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating51.4 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length163 ft (49.8 m)
Longest span53 ft (16.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,371 (2024)
Projected traffic2,063 by 2044
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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 SD028 over Big Sioux Rv built?

It was built in 1951, making it 74 years old in 2025.

What condition is SD028 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 October 2024.

How much traffic does SD028 over Big Sioux Rv carry?

About 1,371 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is SD028 over Big Sioux Rv?

The structure is 163 ft (49.8 m) long with a longest span of 53 ft (16.1 m) and a deck 32 ft wide.

Who owns SD028 over Big Sioux Rv?

It is owned by the State Highway Agency.