Gladstone Bore 3 - Drilling Contract

Overview Waimakariri District Council is seeking a contractor for the drilling, development, testing and capping of one new potable water supply bore (Gladstone Bore 3) for the Woodend-Pegasus drinking water supply. The location of the bore is shown in the locality plan in Appendix A. Scope The scope includes: Obtaining ECan consents for drilling and discharging water Mobilisation to site, including disinfection and cleaning of all necessary drilling equipment prior to drilling Drilling and later removal of a 400mm nominal diameter temporary outer bore casing Drilling of a 300mm nominal diameter production bore to a depth of approximately 215m Supply and installation of casings Installation of a full sanitary seal between the ground and the production casing at the site Sealing and grouting of casing Design and installation of screen (and packers if required) Development and proving of bore Disposal of test / development water in compliance with Section 5.109 of the Canterbury Land and Water Regional Plan Capping of casing as per Drawing 4794 sheet 02 Provision of as-built data, including drilling logs, video recordings of bore, and registration of bore with Environment Canterbury Provision of water quality, age and radiological testing results Demobilisation and site clean-up Liaison with affected landowners, user groups, and neighbouring property owners Provisional clearance of trees to enable the drilling of the new bore Provisional replacement of vehicle gates to match existing adjacent fences Provisional decommissioning of an existing bore (not the bore to be drilled under this contract) Contractor Requirements A Safety in Design (SiD) process has been undertaken which involved eliminating project risks at the design stage where practicable. Not all risks could be eliminated, and the following construction risks have been identified that the Contractor will need to address as part of their tender submission: Contamination of aquifers Drilling / construction risks Dust, noise and vibration Damage to existing infrastructure Underground services Weather-related risks, including wind and rain Ground conditions Sediment / discharge control Liaison with affected landowners, user groups and neighbouring property owners