The emails have targeted some members of a committee overseeing the development of the West Coast's combined district plan, the Te Tai o Poutini Plan (TTPP).
One of the country's richest seams has been reached in the former gold mining town of Waiuta, promising jobs for the next decade.
Police were called to the crash on Lower Buller Gorge Road on Saturday night.
"Heard it coming big time."
The holiday road toll rose to 10.
There are plans to establish another mine at Mananui, south of Hokitika.
Police say the search team is standing down after it didn't find any new information.
It comes after a person was rescued in a critical condition from a pit at Taylorville Resource Park, near Greymouth, after being overcome by fumes.
The tunnel may be old, but it's the younger generation who are deciding how it will look for the next 100 years.
