US Bridges

SD075 over North Fork Grand Rv

Fair

Perkins County, South Dakota · 5.5 N of Lodgepole · Structure no. 000000053150046

Built
1952
73 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
342 ft
5 main spans
Daily traffic
334
2024 count
Owner
State
State Highway Agency

About this bridge

SD075 over North Fork Grand Rv is a steel continuous stringer/multi-beam or girder carrying SD075 over North Fork Grand Rv in Perkins County, South Dakota. It was built in 1952, so it is 73 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 334 vehicles a day, roughly 16% of them trucks, projected to reach 499 by 2044. The structure is 342 ft (104.1 m) long and 26 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

CarriesSD075
CrossesNorth Fork Grand Rv
Location5.5 N of Lodgepole
RouteState Highway 75
Coordinates45.88421, -102.65248
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating27.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length342 ft (104.1 m)
Longest span89 ft (27.2 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic334 (2024)
Projected traffic499 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$175,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SD075 over North Fork Grand Rv built?

It was built in 1952, making it 73 years old in 2025.

What condition is SD075 over North Fork Grand 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 August 2024.

How much traffic does SD075 over North Fork Grand Rv carry?

About 334 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is SD075 over North Fork Grand Rv?

The structure is 342 ft (104.1 m) long with a longest span of 89 ft (27.2 m) and a deck 26 ft wide.

Who owns SD075 over North Fork Grand Rv?

It is owned by the State Highway Agency.