US Bridges

30880 River RD over Ck

Fair

Union County, South Dakota · 3E & 1.7S Big Springs · Structure no. 000000064133118

Built
1979
46 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

30880 River RD over Ck is a prestressed concrete tee beam carrying 30880 River RD over Ck 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 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 50 vehicles a day, roughly 3% of them trucks, projected to reach 50 by 2032. The structure is 51 ft (15.5 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Carries30880 River RD
CrossesCk
Location3E & 1.7S Big Springs
RouteCounty Highway 0
Coordinates42.91273, -96.54193
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length51 ft (15.5 m)
Longest span49 ft (14.9 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 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 30880 River RD over Ck built?

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

What condition is 30880 River RD over 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 August 2024.

How much traffic does 30880 River RD over Ck carry?

About 50 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 30880 River RD over Ck?

The structure is 51 ft (15.5 m) long with a longest span of 49 ft (14.9 m) and a deck 28 ft wide.

Who owns 30880 River RD over Ck?

It is owned by the County Highway Agency.