Flagpole installation acrossMinnesota

Flagpoles in Minnesota

Head offices in Minneapolis, the Capitol in Saint Paul, the Mayo campus at Rochester and the ore docks at Duluth.

Wind here. Minnesota does not read its wind speed off a contour. Eder's wind map carries one figure for the whole state, 90 mph, and it applies from Worthington to the Canadian border, with exposure and topography then worked out for the site. What moves across the state is the ground. The state building code fixes the minimum footing depth against frost, and it is 3 ft 6 in through Mankato, Rochester and the Twin Cities against a full 5 ft in St. Louis County and the north. So a Duluth hole goes eighteen inches deeper than a Mankato one for the same pole, and up there it is usually cut rather than dug. Wind still decides the shaft on an exposed site. Here it is the concrete the address changes.

• The Twin Cities and the southern counties — 90 mph, on a 3 ft 6 in frost footing. Glacial till that an auger goes through, so most of the quote is pole and height rather than hole.
• The karst southeast — The same 90 mph, over limestone lying shallow through Olmsted County and the bluff country. A hole that has to reach 3 ft 6 in often finishes in rock, and that is where the cost lands.
• The granite belt in the centre — 90 mph again, on bedrock that was worth quarrying. Around St. Cloud the granite sits close enough to the surface that the excavation, not the shaft, is the line to watch on a quote.
• The North Shore and the Arrowhead — The same figure on paper, and nothing upwind of it. St. Louis County wants 5 ft of footing, and nothing on that shore stays dry for long, so a heavier wall, an anodized finish and stainless hardware all belong in the first quote rather than a later one.

Flying the Minnesota 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 Minnesota 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 Minnesota. 100–150 ft flagpoles in Minnesota →