Line Patrolling Jul 21, 2009 9:15:08 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by westie on Jul 21, 2009 9:15:08 GMT United Utilities are about to re-commence low level powerline patrols in the county using PDG Twin Squirrels.They can (and do) fly down to as low as 40ft on this type of work on the wood pole lines.