US Bridges

164 Street over Big Sioux Rv

Fair

Codington County, South Dakota · 8N 3.2 W Watertown · Structure no. 000000015159100

Built
1966
59 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
182 ft
3 main spans
Daily traffic
397
2022 count
Owner
County
County Highway Agency

About this bridge

164 Street over Big Sioux Rv is a steel continuous stringer/multi-beam or girder carrying 164 Street over Big Sioux Rv in Codington County, South Dakota. It was built in 1966, 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 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 397 vehicles a day, roughly 2% of them trucks, projected to reach 397 by 2035. The structure is 182 ft (55.5 m) long and 32 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Carries164 Street
CrossesBig Sioux Rv
Location8N 3.2 W Watertown
RouteCounty Highway 0
Coordinates45.00609, -97.16484
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating39 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length182 ft (55.5 m)
Longest span70 ft (21.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic397 (2022)
Projected traffic397 by 2035
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$120,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 164 Street over Big Sioux Rv built?

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

What condition is 164 Street 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 June 2024.

How much traffic does 164 Street over Big Sioux Rv carry?

About 397 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 164 Street over Big Sioux Rv?

The structure is 182 ft (55.5 m) long with a longest span of 70 ft (21.3 m) and a deck 32 ft wide.

Who owns 164 Street over Big Sioux Rv?

It is owned by the County Highway Agency.