Rangitata/Rakitata River Flood Resilience – Groyne Rockwork Reinstatement

Overview Canterbury Regional Council (Environment Canterbury) is seeking responses to this Request for Proposal from suitably experienced contractors to undertake construction of new groyne structures on the true right bank of the Rangitata/Rakitata River, below the Arundel bridge. About The Council has a statutory function under the Soil Conservation and Rivers Control Act 1941 to manage land use within the region to prevent and mitigate damage caused by floods and erosion (see s126 of the Act). Scope The scope includes: Construction of four groyne structures on the true right bank of the Rangitata/Rakitata River, below the Arundel bridge Clearance of berm vegetation prior to construction of the new groynes Removal of existing groynes Clearance of any unsuitable material from the works area Diversion works to the Rangitata River braids, where required, to allow groyne construction to proceed in the dry Carting and placing of approximately 5500 tonne of rock from a Rangitata South Irrigation Limited (RSIL) stockpile adjacent to the site to form the new groynes Procurement and importing of a further approximately 9000 tonne of rock to the site to form the groynes Potential reuse of rock from the existing groynes slated for removal, where suitable, to reduce the amount of imported rock required Details of the works required are included in the Specifications in Part C and the Construction Plans in Appendix 3. The number of groynes constructed may vary between two and four depending on tender prices, as the project has a fixed budget for these improvements. Environment Canterbury will agree to the final scope of work with the selected contractor prior to finalising contract documents. Contractor Requirements Suitably experienced in undertaking construction works of this nature Instructions to Tenderers Access to the work sites will be via the Rangitata South Irrigation Limited (RSIL) pond access road, property owned by Rangitata Water Limited. All necessary agreements are in place with the landowner with regard to this work.