US Bridges

465th Avenue over Big Sioux Rv

Fair

Brookings County, South Dakota · 7N & 0.6W Bruce · Structure no. 000000006112002

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
113 ft
1 main span
Daily traffic
340
2022 count
Owner
County
County Highway Agency

About this bridge

465th Avenue over Big Sioux Rv is a concrete stringer/multi-beam or girder carrying 465th Avenue over Big Sioux Rv in Brookings County, South Dakota. It was built in 1970, 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 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.

It carries about 340 vehicles a day, roughly 2% of them trucks, projected to reach 340 by 2032. The structure is 113 ft (34.4 m) long and 19 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries465th Avenue
CrossesBig Sioux Rv
Location7N & 0.6W Bruce
RouteCounty Highway 0
CountyBrookings County
StateSouth Dakota
Coordinates44.54106, -96.9043
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.
Superstructure7 GoodSome minor problems.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadUnknown
Structure length113 ft (34.4 m)
Longest span50 ft (15.3 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic340 (2022)
Projected traffic340 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 465th Avenue over Big Sioux Rv built?

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

What condition is 465th Avenue 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 September 2024.

How much traffic does 465th Avenue over Big Sioux Rv carry?

About 340 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 465th Avenue over Big Sioux Rv?

The structure is 113 ft (34.4 m) long with a longest span of 50 ft (15.3 m) and a deck 19 ft wide.

Who owns 465th Avenue over Big Sioux Rv?

It is owned by the County Highway Agency.