US Bridges

Shore Drive over Gavins Point Spillway

Fair

Yankton County, South Dakota · 5 Miles West of Yankton · Structure no. CEPMROSD0000001

Built
1956
69 years old
Condition
Fair
inspected October 2024
Type
Girder and Floorbeam System
Steel
Length
808 ft
17 main spans
Daily traffic
1,029
2022 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

Shore Drive over Gavins Point Spillway is a steel girder and floorbeam system carrying Shore Drive over Gavins Point Spillway in Yankton County, South Dakota. It was built in 1956, so it is 69 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 808 ft (246.3 m) long and 23 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesShore Drive
CrossesGavins Point Spillway
Location5 Miles West of Yankton
RouteFederal Lands Road 0
Coordinates42.85083, -97.4825
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.
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 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 alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans17
Design loadHS 20 + Mod
Structure length808 ft (246.3 m)
Longest span43 ft (13.1 m)
Deck width23 ft (7 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,029 (2022)
Projected traffic1,400 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$78,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Shore Drive over Gavins Point Spillway built?

It was built in 1956, making it 69 years old in 2025.

What condition is Shore Drive over Gavins Point Spillway 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 Spillway carry?

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

How long is Shore Drive over Gavins Point Spillway?

The structure is 808 ft (246.3 m) long with a longest span of 43 ft (13.1 m) and a deck 23 ft wide.

Who owns Shore Drive over Gavins Point Spillway?

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