Investor Presentaiton
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Lihir Deep Sea Tailings Placement
Rigorous baseline studies prior to approval
DSTP approved as the preferred tailings
management option from an environmental and
social point of view for Lihir which has limited space
for terrestrial tailings storage and is a seismically
active region
Ongoing monitoring of DSTP under a government
approved Environmental Management and
Monitoring Plan (EMMP)
Lihir Environmental Management System certified
to ISO14001:2015
Detailed seabed and tailings footprint surveys every
five years as per EMMP requirements
Periodic specialist technical reviews to assess
DSTP system functioning as designed and develop
ongoing research projects
Tailings pipeline
Mix-de-aeration tank
Seawater intake pipe
0m-
MLD Mixed layer depth
20-
20
Outfall pipeline
40-
Mean MLD&EZD (50 m)
60-
EZD Euphotic (photosynthesis) zone depth
80-
100-
Outfall terminus 120-
-120 m
140-
Tailings travel as a density current to depths
160-
>1000 m
Deep ocean
>1000 m
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