US Bridges

476th Avenue over Trib to Silver Creek

Fair

Minnehaha County, South Dakota · 2E & 3.1S Baltic · Structure no. 000000050220091

Built
1938
87 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
41
2022 count
Owner
County
County Highway Agency

About this bridge

476th Avenue over Trib to Silver Creek is a concrete continuous culvert carrying 476th Avenue over Trib to Silver Creek in Minnehaha County, South Dakota. It was built in 1938, so it is 87 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 41 vehicles a day, roughly 2% of them trucks, projected to reach 50 by 2037. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Carries476th Avenue
CrossesTrib to Silver Creek
Location2E & 3.1S Baltic
RouteCounty Highway 0
Coordinates43.71718, -96.69119
Functional classRural Local

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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.3 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic50 by 2037
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$182,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 476th Avenue over Trib to Silver Creek built?

It was built in 1938, making it 87 years old in 2025.

What condition is 476th Avenue over Trib to Silver Creek 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 July 2024.

How much traffic does 476th Avenue over Trib to Silver Creek carry?

About 41 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 476th Avenue over Trib to Silver Creek?

The structure is 21 ft (6.3 m) long with a longest span of 11 ft (3.3 m).

Who owns 476th Avenue over Trib to Silver Creek?

It is owned by the County Highway Agency.