US Bridges

8th Avenue over Hay Ck

Good

Butte County, South Dakota · 8th Avenue- Belle Fourche · Structure no. 000000010100378

Built
2019
6 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
33 ft
2 main spans
Daily traffic
300
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

8th Avenue over Hay Ck is a concrete culvert carrying 8th Avenue over Hay Ck in Butte County, South Dakota. It was built in 2019, so it is 6 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 300 vehicles a day, roughly 2% of them trucks, projected to reach 300 by 2032. The structure is 33 ft (10.2 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries8th Avenue
CrossesHay Ck
Location8th Avenue- Belle Fourche
RouteCity Street 0
Coordinates44.66601, -103.84929
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.7 US tons
Inventory rating38.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length33 ft (10.2 m)
Longest span15 ft (4.7 m)
Deck width45 ft (13.7 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2022)
Projected traffic300 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 8th Avenue over Hay Ck built?

It was built in 2019, making it 6 years old in 2025.

What condition is 8th Avenue over Hay Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does 8th Avenue over Hay Ck carry?

About 300 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 8th Avenue over Hay Ck?

The structure is 33 ft (10.2 m) long with a longest span of 15 ft (4.7 m) and a deck 45 ft wide.

Who owns 8th Avenue over Hay Ck?

It is owned by the Town or Township Highway Agency.