US Bridges

SD047 over Waterhole Ck

Good

Lyman County, South Dakota · 23.0N 1.0W Gregory · Structure no. 000000043453439

Built
2018
7 years old
Condition
Good
inspected October 2022
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
258
2024 count
Owner
State
State Highway Agency

About this bridge

SD047 over Waterhole Ck is a concrete continuous culvert carrying SD047 over Waterhole Ck in Lyman County, South Dakota. It was built in 2018, so it is 7 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 258 vehicles a day, roughly 24% of them trucks, projected to reach 365 by 2044. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 55.3 mi (89 km).

CarriesSD047
CrossesWaterhole Ck
Location23.0N 1.0W Gregory
RouteState Highway 47
Coordinates43.55858, -99.45901
Functional classRural Minor Arterial

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.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating99.3 US tons
Inventory rating76.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length23 ft (6.9 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic258 (2024)
Projected traffic365 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.3 mi (89 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SD047 over Waterhole Ck built?

It was built in 2018, making it 7 years old in 2025.

What condition is SD047 over Waterhole 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 October 2022.

How much traffic does SD047 over Waterhole Ck carry?

About 258 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is SD047 over Waterhole Ck?

The structure is 23 ft (6.9 m) long with a longest span of 11 ft (3.4 m).

Who owns SD047 over Waterhole Ck?

It is owned by the State Highway Agency.