US Bridges

359 Avenue over Whetstone Ck

Good

Gregory County, South Dakota · 1.5W & 6.3N Bonesteel · Structure no. 000000027275227

Built
2003
22 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

359 Avenue over Whetstone Ck is a concrete continuous slab carrying 359 Avenue over Whetstone Ck in Gregory County, South Dakota. It was built in 2003, so it is 22 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 30 vehicles a day, roughly 3% of them trucks, projected to reach 32 by 2032. The structure is 128 ft (39 m) long and 27 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Carries359 Avenue
CrossesWhetstone Ck
Location1.5W & 6.3N Bonesteel
RouteCounty Highway 0
Coordinates43.17474, -98.99179
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating90.1 US tons
Inventory rating54 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length128 ft (39 m)
Longest span47 ft (14.2 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic32 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 359 Avenue over Whetstone Ck built?

It was built in 2003, making it 22 years old in 2025.

What condition is 359 Avenue over Whetstone 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 July 2024.

How much traffic does 359 Avenue over Whetstone Ck carry?

About 30 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 359 Avenue over Whetstone Ck?

The structure is 128 ft (39 m) long with a longest span of 47 ft (14.2 m) and a deck 27 ft wide.

Who owns 359 Avenue over Whetstone Ck?

It is owned by the County Highway Agency.