US Bridges

Shore Drive over Gavins Point Powerhouse

Fair

Yankton County, South Dakota · 5 Miles West of Yankton · Structure no. CEPNWOSD0000027

Built
1954
71 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
334 ft
12 main spans
Daily traffic
1,029
2022 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

Shore Drive over Gavins Point Powerhouse is a concrete stringer/multi-beam or girder carrying Shore Drive over Gavins Point Powerhouse in Yankton County, South Dakota. It was built in 1954, so it is 71 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 1,029 vehicles a day, roughly 4% of them trucks, projected to reach 1,400 by 2041. The structure is 334 ft (101.9 m) long and 30 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesShore Drive
CrossesGavins Point Powerhouse
Location5 Miles West of Yankton
RouteFederal Lands Road 0
CountyYankton County
StateSouth Dakota
Coordinates42.84869, -97.4816
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating26.8 US tons
Inventory rating20.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20 + Mod
Structure length334 ft (101.9 m)
Longest span35 ft (10.7 m)
Deck width30 ft (9.1 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic1,029 (2022)
Projected traffic1,400 by 2041
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCorps of Engineers (Civil)
Maintained byCorps of Engineers (Civil)
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$41,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Shore Drive over Gavins Point Powerhouse built?

It was built in 1954, making it 71 years old in 2025.

What condition is Shore Drive over Gavins Point Powerhouse 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 October 2024.

How much traffic does Shore Drive over Gavins Point Powerhouse carry?

About 1,029 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Shore Drive over Gavins Point Powerhouse?

The structure is 334 ft (101.9 m) long with a longest span of 35 ft (10.7 m) and a deck 30 ft wide.

Who owns Shore Drive over Gavins Point Powerhouse?

It is owned by the Corps of Engineers (Civil).