In 1902 the shaft cut the Golden Gate reef at 480 feet ( 150 m ) .
They sunk an underlie for 142 feet ( 43 m ) ; however the reef was not payable and the straight shaft was the outlet for the water .
In 1902 the shaft cut the Golden Gate reef at 480 feet ( 150 m ) and they sunk an underlie for 142 feet ( 43 m ) ; however the reef was not payable and the straight shaft was the outlet for the water .