US Bridges

480th Avenue over Lake Alvin Outlet

Fair

Lincoln County, South Dakota · 0.5N & 4.5E of Harrisburg · Structure no. 000000042160044

Built
1990
35 years old
Condition
Fair
inspected June 2023
Type
Culvert
Steel
Length
22 ft
2 main spans
Daily traffic
805
2022 count
Owner
County
County Highway Agency

About this bridge

480th Avenue over Lake Alvin Outlet is a steel culvert carrying 480th Avenue over Lake Alvin Outlet in Lincoln County, South Dakota. It was built in 1990, so it is 35 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 fair condition with a lowest component rating of 6 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 805 vehicles a day, roughly 6% of them trucks, projected to reach 1,050 by 2040. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries480th Avenue
CrossesLake Alvin Outlet
Location0.5N & 4.5E of Harrisburg
RouteCounty Highway 0
CountyLincoln County
StateSouth Dakota
Coordinates43.44068, -96.60899
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic805 (2022)
Projected traffic1,050 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 480th Avenue over Lake Alvin Outlet built?

It was built in 1990, making it 35 years old in 2025.

What condition is 480th Avenue over Lake Alvin Outlet 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 June 2023.

How much traffic does 480th Avenue over Lake Alvin Outlet carry?

About 805 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is 480th Avenue over Lake Alvin Outlet?

The structure is 22 ft (6.7 m) long with a longest span of 9 ft (2.7 m).

Who owns 480th Avenue over Lake Alvin Outlet?

It is owned by the County Highway Agency.