Dual spinner, dual auger salt spreading apparatus and method

Method for distribution of granular salt or brine from a vehicle, which comprises the steps of:

• (a) providing:
• (i) an auger assembly comprising a pair of powered independently rotating flighted auger sections disposed in an auger box and receiving salt stored by said vehicle, each said auger section having a discharge end surrounded by a choke fitting closely thereto and located at opposite ends;
• and
• (ii) a pair of powered spinner assemblies, each spinner assembly disposed beneath an auger discharge end for receiving salt from each auger assembly, each spinner assembly throws salt independently and rotates in opposite directions;
• (b) engaging said auger sections to feed salt to said spinner assemblies, said spinner assemblies distributing salt onto the roadway traversed by said vehicle,
• when salt is to be thrown from only one of the spinner assemblies, both of said auger sections rotate in the same direction for feeding the spinner assembly that is throwing salt.