Queenstown-Lakes District Council

C-26-170 Crown Range Road Slip RP15.77

The project involves conducting slip remediation works on Crown Range Road at RP 15.77. The work involves stabilising the slope by cutting benches from top to bottom and carting material to the designated deposition site. The slope has been creeping for several years and is in a state of active failure. Benching profiles have been provided in the drawings, but amendments will likely need to be made on site (in conjunction with the Engineer) to suit ground conditions encountered. The maximum volume of material that can be removed from the slip site is 10,000m3 as per the Resource Consent conditions. A deposition site for cut material located at RP 20.21 on Crown Range Road has been arranged and will require the Contractor to place and compact cut material as detailed in the drawings. The Contractor will need to install a temporary bridge across the Cardrona River to access the slip site. Works will also include removal and reinstatement of an existing timber catch fence at the toe of the slope following completion of earthworks operations. Both the slip site and deposition site are ecologically and culturally significant for several reasons, and the Contractor must strictly adhere to Resource Consent conditions. Specifically, the deposition site is home to two different lizard species. A Lizard Management Plan has been prepared to support a Wildlife Act Authority. Native planting and creation of loose rock stacks is required at the deposition site on completion of earthworks. Planting is also required to reinstate the access track which will be formed to reach the top of the slip site.