South Dakota Administrative Rules
Title 70 - Department of Transportation
Article 70:02 - Aeronautics
Chapter 70:02:04 - Airport licensing
Section 70:02:04:09 - Minimum requirements for heliports

(1) For a single pad heliport there must be a touchdown pad at least 50 feet in diameter with a safety zone, free of all obstructions, extending outward for a distance of at least 50 feet beyond the outer edge of the touchdown pad;

(2) For a multiple pad heliport, touchdown pads should be arranged in appropriate multiples having a minimum edge to edge distance of 100 feet between safety zones as described in subdivision (1) of this section;

(3) Approaches to permit landings and takeoffs in the prevailing wind direction shall have a slope of 10:1, or better, and the side slope in all other directions shall be 5:1, or better, both slopes extending outward until a height equal to the minimum enroute altitude is reached;

(4) Heliports on building roofs may be licensed if the roof is of sufficient size and if adequate evidence is shown that the roof will support a concentrated load equivalent to three quarters of the maximum gross weight of the critical helicopter to be used on any one square foot.