US Bridges

200th Street over Sixmile Ck

PoorPosted for load

Brookings County, South Dakota · 3.5N & 0.8E White · Structure no. 000000006248040

Built
1966
59 years old, rebuilt 2007
Condition
Poor
inspected September 2023
Type
Channel Beam
Concrete Continuous
Length
36 ft
1 main span
Daily traffic
127
2022 count
Owner
County
County Highway Agency

About this bridge

200th Street over Sixmile Ck is a concrete continuous channel beam carrying 200th Street over Sixmile Ck in Brookings County, South Dakota. It was built in 1966 and reconstructed in 2007, so it is 59 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 4 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 127 vehicles a day, roughly 2% of them trucks, projected to reach 127 by 2034. The structure is 36 ft (11.1 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries200th Street
CrossesSixmile Ck
Location3.5N & 0.8E White
RouteCounty Highway 0
Coordinates44.48448, -96.62872
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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27 US tons
Inventory rating16.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length36 ft (11.1 m)
Longest span35 ft (10.7 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic127 (2022)
Projected traffic127 by 2034
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$866,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 200th Street over Sixmile Ck built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2007.

What condition is 200th Street over Sixmile 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 September 2023.

How much traffic does 200th Street over Sixmile Ck carry?

About 127 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 200th Street over Sixmile Ck?

The structure is 36 ft (11.1 m) long with a longest span of 35 ft (10.7 m) and a deck 29 ft wide.

Who owns 200th Street over Sixmile Ck?

It is owned by the County Highway Agency.