CYANIDE TO BE REMOVED FROM PEBBLE PROJECT The
outdated 2011 PEA completed by Northern Dynasty envisaged Pebble being built at the initial throughput rate of 219,000 tpd. This is
in the process of being materially scaled down.
We expect Pebble to initially be built (Phase I) at the scaled-down throughput rate of 100,000 tpd, which would materially reduce the surface footprint of the project (Cantor estimate ~5 square miles, down from ~14 square miles
In addition to reducing the Phase I project footprint by over 50%, the secondary gold recovery circuit will be removed from the metallurgical flowsheet. While this will reduce overall gold recoveries by ~15% (Phase I), it
will remove all cyanide from the concentrator and project site.
SEE MORE ON PAGE 4 OF JULY 2017 CANTOR REPORT; https://www.docdroid.net/MlNolSv/northern-dynasty-minerals-ltd-cantor-fitzgerald.pdf