Tender 66 operates as Duvall Fires second out fire engine.  While it is a water tender it is unique in that it has a fire pump and equipment on board to qualify as a fire engine. 

Tender 66 has an onboard "Porta-Tank" allowing it to dump it's water on a fire scene.  This is done to allow other units to draft from the tank, while the tender shuttles more water from a remote location. 

Tender 66 is a member of Duvall Fires active mobilization program.  Typically it responds to wildland fires during the summer months.