US Bridges

206th Avenue over Whitewater Ck

FairPosted for load

Jackson County, South Dakota · 4.6S & 4W Cottonwood · Structure no. 000000036080066

Built
1985
40 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
2 main spans
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

206th Avenue over Whitewater Ck is a steel stringer/multi-beam or girder carrying 206th Avenue over Whitewater Ck in Jackson County, South Dakota. It was built in 1985, so it is 40 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. Its operating status is: posted for load restriction.

It carries about 15 vehicles a day, roughly 2% of them trucks, projected to reach 15 by 2032. The structure is 67 ft (20.4 m) long and 16 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
Carries206th Avenue
CrossesWhitewater Ck
Location4.6S & 4W Cottonwood
RouteCounty Highway 0
CountyJackson County
StateSouth Dakota
Coordinates43.90036, -101.97998
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating5.8 US tons
Inventory rating3.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span43 ft (13.1 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 by 2032
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$380,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 206th Avenue over Whitewater Ck built?

It was built in 1985, making it 40 years old in 2025.

What condition is 206th Avenue over Whitewater 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 June 2024.

How much traffic does 206th Avenue over Whitewater Ck carry?

About 15 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 206th Avenue over Whitewater Ck?

The structure is 67 ft (20.4 m) long with a longest span of 43 ft (13.1 m) and a deck 16 ft wide.

Who owns 206th Avenue over Whitewater Ck?

It is owned by the County Highway Agency.