Tenders Are Invited For Core Drilling Service

Tenders Are Invited For Procurement Of Core Drilling Service For Gambela Region Gilo Large Scale Irrigation Project Study Works Personnel RequirementsThe Drilling Contractor Shall Provide Capable And Experienced Personnel To Perform The Work The Drilling Contractors Project Manager Shall Be An Engineering Geologist Or Drilling Engineer With At Least 10 Years Of Drilling Experience Who Shall Be Responsible For Site Operations At Each Drill Site The Drilling Contractor Shall Also Provide An Engineering Geologist Or Drilling Engineer With At Least 4 Years Of Experience And Other Suitable To Perform The Work Changes In Personnel During The Execution Of The Contract Shall Be Done Subject To The Approval Of The Supervisor Or Designated Representative The Drilling Contractor Shall Be Fully Operational With The Drilling Unit And Installation Crew Working Within Two Weeks Of Commencing Core Drilling Construction The Contractor Shall Submit With His Geotechnical Plan An Organizational Chart Showing The Structure Of The Working Team And The Number Of Personnel Who Will Be Employed For The Works The Contractor Shall Submit Qualifications Of Its Personnel To The Client Sdcse At The Time Of Submissions Technical Proposal Material RequirementThe Equipment Shall Include Heavy Duty Drilling Rigs Provided With Hydraulic Feed Mechanisms To Facilitate Obtaining Undisturbed Soil Samples In Overburden And Cores In The Rock Drill Rods Should Have A Minimum Outer Diameter Of 76Mm Supplied By The Specialized Manufacturer Rods And Joints Have To Be In Perfect Condition To Avoid Failures And Deviation Of Boreholes The Toe To The Lining Shall No Time Be More Than 1 0 M Above The Level To Which Soil Has Been Removed From The Borehole Before Taking Any Undisturbed Samples Or Making Any In Situ Tests The Lining Shall Be Carried Down To The Bottom Of The Bore Holes At The Test Depth Before Taking Any Undisturbed Samples Or Making Any In Situ Tests The Lining Shall Be Carried Down To The Bottom Of The Bore Holes At The Test Depth The Contractor Shall Use An Adequate Number Of Drilling Rigs For Core Diameters Of At Least 76 2Mm Nx Size Both In Rock And Overburden Larger Diameter Cores Maybe Specifically Requested By The Client For Laboratory Testing The Machines Shall Be Mobile Or Type So That Small Crews Can Reasonably Be Expected To Move Them Across Difficult Terrain No Additional Allowance Or Payment Will Be Made For Penetration Of Boulders Cementing And Use Of Bentonite Circulation And Reaming Of The Hole Cementing And Bentonite Circulation May Only Be Applied After Approval Of The Client The Contractor Shall Provide All Necessary Water Water Tanks And Suitable Means Of Pressurizing For Cleaning Casing Prior To Sampling Coring Rock Etc The Contractor Shall Provide Such Platforms As May Be Necessary To Maintain Drill Rigs Level When Making Horizontal Or Vertical Borings On Sloped Land Soft Ground And Similar The Contractor Shall Provide Pontoons And Such Platforms As May Be Necessary To Maintain Drill Rigs Level When Making Vertical Borings In The Middle Of A River Coring Of Rock And Undisturbed Sampling Shall Be Done With Rigs Mounted On A Fixed Platform To Avoid Any Crucial Disturbance Bid Bond 2

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