Stantec // Oceana Gold NZ // Transportation Assessment - Waihi North Project 18 • The Martha Phase 4 Cutback (MOP4); • The Martha and Rex underground; and • Use of existing rock and tailings storage facilities and the Processing Plant. The consent was based on the principal access to the by two key entrances, with access to Martha Pit predominantly from Kenny Street (SH25) and access to the underground workings and processing area predominantly from Baxter Road. OGNZL provided forecasts for personnel expectations for the Project Martha at the time of consenting over the 11year life of the project as shown in Figure 28. The expected traffic demands resulted in minimal changes to movements through the Baxter Road entrance, and an increase in activity at the Kenny Street access in comparison to pre-existing levels, and the peak workforce was forecast to be less than has been experienced during earlier phases of mining. Figure 28 Project Martha Consented Workforce The MOP4 component of the project involves laying back the northern side of the pit wall which will move the edge of the pit northwards. The proposed changes to the pit rim require a realignment of the current curve(s) linking Cambridge Road and Bulltown Road. It is proposed to realign these roads over a length of approximately 270 m to accommodate the proposed pit wall. In addition to the traffic movements associated with the direct and casual workforce, it was expected at that time that aggregate may be required to be imported to be used in the production of cemented aggregate fill (CAF). One possible source of aggregate is the Waitawheta Quarry, located to the south -west of the site and SH2. The consented project is subject to a number of conditions pertaining to traffic and the key ones are s ummarised as: • Prior to the haulage of aggregate for the manufacture of cement aggregate fill, an annual programme for inspection, recording and maintenance of Baxter Road pavement condition, and bridge condition shall be undertaken; and the road is to be returned to at least its standard / condition prior to the commencement of the aggregate / backfill haulage activity on completion. • No heavy vehicles associated with the Martha Underground Mine that are larger than a 11 m long rigid heavy vehicle shall travel via Baxter Road, State Highway 2 and Crean Road (in either direction) prior to the intersections being upgraded to accommodate the design vehicle. • The consent holder shall submit a Traffic Management Plan for the haulage of aggregate for the manufacture of cement aggregate fill for backfilling the Martha Underground Mine to the Hauraki District Council for certification at least 30 working days prior to the haulage of aggregate first occurring. If certification is not provided within 30 working days of Council’s receipt of the Traffic Management Plan the hauling of aggregate material authorised by this consent may commence. • The consent holder shall maintain a log at the Baxter Rd Mine Access Gate for the duration of this consent, which records details on the vehicle movements associated with the import of aggregate for the manufacture of Cement Aggregate Fill. 5 WNP Proposal The current Waihi life of mine plan, authorised by existing consents including Project Martha, ceases production at the end of 2030. The Waihi North Project (WNP) seeks to extend the life of the mine operation to 2038 with rehabilitation and closure in the following year(s) .
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