Authorities accused of turning blind eye to land owner who twice ignored a stop-work order.
The state government will not compromise on the safety of the people, says assistant minister after residents raise concerns.
DAP says residents near quarry just outside the city are concerned over their safety.
They hope the authorities will prevent quarries operating in forest reserves.
The hotel, which is one of a growing number of bold architectural designs springing up in China, hugs one side of the pit wall, with a waterfall cascading down the opposite face.
Source of blasts and tremors still a mystery but unconnected to any earthquakes.
Penang Citizens Awareness Chant Group says the quarry should be shut down for the safety of the residents who live just 100 metres away.
Penang BN chairman says despite what has been stated, 56 hill projects above the permitted height of 76 metres were approved since 2008.
Bukit Bendera MP says Penang government followed due procedure and that approval for development was based on the views of federal government agencies as well.
Penang chief minister says if Department of Environment had requested for it, state government would have instructed developer to conduct the assessment.
Residents' body says the local authorities have been blatantly ignoring Penang State Structure Plan 2007-2020 and approving condo projects there.
Sabah Forestry Department says mud pool was once a source of water in the event of a fire but over time had turned into a deep mud pool.