Ann: Updated Resource & Reserve Statement - Savage River, page-5

I am sure I have read mining life was 20 years and it had been increased to 30 years anyway if you compare the main highlights of this report compared to last years.
374.4 @ 47.6% vs last year 377.5 @ 47.7%
and ore reserves at savage river 83.4Mt @ 52.5% vs last year 86.6Mt @ 52.5% I would say 30 year mining life was reasonable .
I have no idea of mining calculations just working out what we are using compared to last years report would this be correct?