Flagpole installation acrossSouth Dakota

Flagpoles in South Dakota

South Dakota is open country from the Big Sioux to the Black Hills, and most sites here have nothing upwind of them.

Wind here. South Dakota is about 380 miles wide and the Eder wind map does not move across it: 90 mph through the east at Sioux Falls, Brookings and Aberdeen, and 90 mph along the Missouri and on west toward the Black Hills. One zone on the chart in 380 miles, so the map is not what separates one job here from another. Exposure is. Outside the Hills and the river breaks very little stands upwind of anything, so we size for open ground rather than off the contour, and confirm what your own town enforces before we quote. Then the frost decides the hole, and in this state it goes deeper than the load on the pole would ever ask for on its own.

• The Black Hills and the west — 90 mph on the Eder map, and the map is the least of it here. A ridge, a gap or a shoulder above Spearfish, Lead or Custer runs faster than the valley floor beneath it, and that is a Black Hills problem no contour has a way to show.
• The Missouri corridor — 90 mph from Mobridge down through Pierre and Chamberlain, open bluff with the river cut below it. Underneath is Pierre Shale, which swells as it takes up water and shrinks back as it dries, so the footing has to reach past the layer that moves.
• The eastern prairie and the I-29 corridor — 90 mph through Sioux Falls, Brookings and Watertown. A sheltered town lot can take a standard wall. Frontage out on the open corridor cannot, and is priced as open ground whatever the contour says.
• The northern lake plain — 90 mph across Aberdeen and the James valley, on the flat bed of a glacial lake. The silt and clay there hold water rather than shed it, so the hole is drained before any concrete goes into it.

Flying the South Dakota flag? We sell it, sewn to the state's own design specification and sized to sit under the national flag on your pole. See the South Dakota flag →

Need taller than 80 ft? We supply steel flagpoles from 100 to 150 ft, made in the USA, for car dealerships, truck stops and other big sites across South Dakota. 100–150 ft flagpoles in South Dakota →