US Bridges

155 Street over Big Sioux Rv

Fair

Codington County, South Dakota · 6.7E & 6N Florence · Structure no. 000000015157010

Built
1996
29 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Prestressed Concrete
Length
80 ft
2 main spans
Daily traffic
16
2022 count
Owner
County
County Highway Agency

About this bridge

155 Street over Big Sioux Rv is a prestressed concrete tee beam carrying 155 Street over Big Sioux Rv in Codington County, South Dakota. It was built in 1996, so it is 29 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 16 vehicles a day, roughly 2% of them trucks, projected to reach 16 by 2032. The structure is 80 ft (24.4 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries155 Street
CrossesBig Sioux Rv
Location6.7E & 6N Florence
RouteCounty Highway 0
Coordinates45.13669, -97.17
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20 + Mod
Structure length80 ft (24.4 m)
Longest span47 ft (14.3 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16 (2022)
Projected traffic16 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$20,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 155 Street over Big Sioux Rv built?

It was built in 1996, making it 29 years old in 2025.

What condition is 155 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 155 Street over Big Sioux Rv carry?

About 16 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 155 Street over Big Sioux Rv?

The structure is 80 ft (24.4 m) long with a longest span of 47 ft (14.3 m) and a deck 34 ft wide.

Who owns 155 Street over Big Sioux Rv?

It is owned by the County Highway Agency.