Constancia HBM) (NYSE.HBM) announced today that its wholly owned subsidiary, HudBay Peru S.A.C., has entered into the following agreements to acquire mining properties in southern Peru near its Constancia mine. LIMA, Peru--(BUSINESS WIRE)--Graña y Montero S.A.A ... to extend its construction contract of the Constancia Mine (Cusco), for an additional period of two years, until the end of 2019.