By December 2001 , the Lower Bar BC had become no longer economically productive .
By December 2001 , the Lower Bar BC surrendered its 2,000 - acre ( 8.1 km ) lease in Grand Teton Park .
By December 2001 , the Lower Bar BC had become no longer economically productive and surrendered its 2,000 - acre ( 8.1 km ) lease in Grand Teton Park .