Compliance Monitoring Report for Mines and Quarries - National ...

Ngabephu Stone QuarryThe quarry was specifically meant for the construction of Royal Thimphu College. Themanagement however reported that about 300 truck loads of material could have also been sold.The management had stopped operating the quarry since October 2008.General DetailsAddressContact PersonC/O Royal Thimphu College Construction OfficeNgabephu, ThimphuType of minerals mined. Construction stones (Quartzite)Stripping Ratio1:1 (as per FMFS Report)Operation and Annual 10, 000 MT (as per FMFS Report)ProductionGeological/Residual Reserve 145, 000 MTand projected year to lastLease Area and Period 6.71 (2007-2017)Observation:1. Mining Operation DesignPit slope AngleBench Height and Width2. Occupational Health andSafetySafety and ProtectiveGearsWater and SanitationFacilitiesFirst-Aid-Kit3. Waste and OverburdenManagementSanitary WasteTopsoilUndersize/reject,Overburden/inter-burdenand Other materialsMechanism of Dumpingand ArrestingPit slope Angle, BenchHeight and Length ofWidthThe quarrying seemed to have not followed the FMFSReport adequately.Attempts were made to operate the quarry from top down.Materials were extracted mainly by undercutting.The only bench used for extraction of materials measuredabout 21 meters high and 18 meters wide.Operation stopped.Top soil was not stored separately.The overburden was found to have been pushed downhillwhere natural regrowth of chrysanthemums and other shrubshave begun.The height of the dumped overburden was measured to be28 metersThe approved dump site for overburden was not utilized.86