US Bridges

47320 304 Str over Ck

PoorPosted for load

Union County, South Dakota · 6S & 1.2E Beresford · Structure no. 000000064032070

Built
1970
55 years old, rebuilt 1983
Condition
Poor
inspected July 2024
Type
Channel Beam
Concrete
Length
26 ft
1 main span
Daily traffic
43
2022 count
Owner
County
County Highway Agency

About this bridge

47320 304 Str over Ck is a concrete channel beam carrying 47320 304 Str over Ck in Union County, South Dakota. It was built in 1970 and reconstructed in 1983, so it is 55 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 43 vehicles a day, roughly 2% of them trucks, projected to reach 43 by 2032. The structure is 26 ft (7.8 m) long and 19 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries47320 304 Str
CrossesCk
Location6S & 1.2E Beresford
RouteCounty Highway 0
Coordinates42.9824, -96.74339
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18 US tons
Inventory rating13.4 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length26 ft (7.8 m)
Longest span24 ft (7.4 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43 (2022)
Projected traffic43 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 47320 304 Str over Ck built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1983.

What condition is 47320 304 Str over Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does 47320 304 Str over Ck carry?

About 43 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 47320 304 Str over Ck?

The structure is 26 ft (7.8 m) long with a longest span of 24 ft (7.4 m) and a deck 19 ft wide.

Who owns 47320 304 Str over Ck?

It is owned by the County Highway Agency.