Cross Harbour Pipeline Geotechnical Site Investigations

Details

EXPRESSION OF INTEREST FOR UNDERTAKING GEOTECHNCIAL INVESTIGATIONS.
Wellington Water Limited (WWL) are advancing the initial phases of the planned Cross-harbour Pipeline Project.
https://www.wellingtonwater.co.nz/work-in-your-area/cross-harbour-pipeline/
As part of these initial works, geotechnical site investigations are required to gather subsurface information to inform decision making regarding pipeline alignments.
Initial investigations will be focused on the shoreline and near-shore marine areas within Evans Bay and Lowry Bay, within Wellington Harbour (refer figures attached). Timeframe for undertaking the investigations will be dependent on consenting, but site works are currently targeted to occur within July/August 2019. Additional land and marine based investigations are likely to follow in 2020 to assist the design phase.
Preliminary proposed investigations currently include:
• BH core retrieval and SPT testing (to approximately 12m bsf)
• CPT testing (to refusal or to approximate depth 12m bsf)
• Vibro-core (or similar alternative) to 3m bsf
WWL are requesting expressions of interest from Contractors that are interested in undertaking these works as a LEAD Contractor.
To be considered for this work, WWL requests confirmation that the Contractor has the following attributes:
• Demonstrated effective H&S processes and culture on land and marine based investigation sites and adherence to WWL H&S requirements.
• A proven track record of organising and undertaking geotechnical investigations within New Zealand’s marine environment
• Experience in undertaking geotechnical investigations which intercept the Wellington Waiwhetu Aquifer (and potentially other artesian conditions)
• Access to both floating barge and jack-up barge equipment, and supplementary marine support vessels. State the supplier, vessel type/characteristics, and current availability.
• Access to geotechnical investigation rigs and associated equipment required to undertake the proposed investigations for land and marine conditions.
• Access to suitably qualified personnel available to plan, oversee and execute the works.
• Has or can obtain insurances suitable for land and marine investigations. The contract is likely to require Contract Works Insurance, Plant and Motor Vehicle Insurance, and Public Liability Insurance (limit to be confirmed however possibly with a limit of $5M).