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Coal Mining Safety and Health Regulation 2017
sec.59Survey grid system
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### sec.59 Survey grid system
The site senior executive for a coal mine must ensure—
a datum station, referenced to GDA and AHD, is established near the mine for mine surveys; and
if a local grid system is used for the surveys, the relationship between the grid system and GDA and AHD is established and shown on the survey plans.
- (a) a datum station, referenced to GDA and AHD, is established near the mine for mine surveys; and
- (b) if a local grid system is used for the surveys, the relationship between the grid system and GDA and AHD is established and shown on the survey plans.