US Bridges

378th Avenue over Snake Creek

Fair

Spink County, South Dakota · 3 W 0.3 N Northville · Structure no. 000000058040057

Built
1967
58 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
93 ft
3 main spans
Daily traffic
39
2022 count
Owner
County
County Highway Agency

About this bridge

378th Avenue over Snake Creek is a concrete slab carrying 378th Avenue over Snake Creek in Spink County, South Dakota. It was built in 1967, so it is 58 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 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 39 vehicles a day, roughly 3% of them trucks, projected to reach 39 by 2032. The structure is 93 ft (28.3 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries378th Avenue
CrossesSnake Creek
Location3 W 0.3 N Northville
RouteCounty Highway 0
Coordinates45.16292, -98.63635
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.5 US tons
Inventory rating26.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39 (2022)
Projected traffic39 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 378th Avenue over Snake Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is 378th Avenue over Snake 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 September 2024.

How much traffic does 378th Avenue over Snake Creek carry?

About 39 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 378th Avenue over Snake Creek?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 33 ft wide.

Who owns 378th Avenue over Snake Creek?

It is owned by the County Highway Agency.