*Size and type of helicopter;
*Suitability of the planned activity;
*Physical barriers or obstructions;
*Helicopter touchdown area and congestion in the area.
must be maintained in a neat and orderly fashion so as to reduce the likelihood of flying materials, tripping, or other hazards attendant to the work being performed.
Wash. Admin. Code § 296-45-67519
Order 76-38, § 296-45-67519, filed 12/30/76.