US Bridges

IRR SD065 over Grand Rv

Good

Corson County, South Dakota · 15 N Dewey CO Line · Structure no. 000000016323181

Built
2012
13 years old
Condition
Good
inspected October 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
399 ft
4 main spans
Daily traffic
234
2024 count
Owner
State
State Highway Agency

About this bridge

IRR SD065 over Grand Rv is a prestressed concrete continuous stringer/multi-beam or girder carrying IRR SD065 over Grand Rv in Corson County, South Dakota. It was built in 2012, so it is 13 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 234 vehicles a day, roughly 24% of them trucks, projected to reach 306 by 2044. The structure is 399 ft (121.5 m) long and 35 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

CarriesIRR SD065
CrossesGrand Rv
Location15 N Dewey CO Line
RouteState Highway 65
Coordinates45.68806, -101.33907
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating62.5 US tons
Inventory rating42.1 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length399 ft (121.5 m)
Longest span103 ft (31.4 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic234 (2024)
Projected traffic306 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SD065 over Grand Rv built?

It was built in 2012, making it 13 years old in 2025.

What condition is IRR SD065 over Grand Rv in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2022.

How much traffic does IRR SD065 over Grand Rv carry?

About 234 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is IRR SD065 over Grand Rv?

The structure is 399 ft (121.5 m) long with a longest span of 103 ft (31.4 m) and a deck 35 ft wide.

Who owns IRR SD065 over Grand Rv?

It is owned by the State Highway Agency.