This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited Rp 001 R0 20210601 SJP (Waihi North Noise Assessment) ISSUE 40 of 79 9.3 Ventilation Raise Noise Emissions 9.3.1 Construction Noise Noise contours for the indicative raise sites in the forest area are shown on the following pages. These show noise level emissions from ventilation raise construction activity as it affects the conservation area. Noise levels drop off relatively quickly and the area of land exposed to noise levels above ambient noise (around 40 – 45 dB) is quite small. The closest walking tracks to any of the ventilation raises are the Wharekirauponga Walk (loop track) and the lesser used Wharekirauponga Track (that traverses the Coromandel Range). These are shown in Figure 25 opposite. We understand from the Greenaway and Associates recreation report that the Wharekirauponga Walk has daily average of approximately 10 walkers each way and a maximum number in Summer 2020 of 60 walkers each way. Because the track counters used to record these visits is at the start of the track, it is likely that not all walkers would complete the entire track loop, so these numbers may be considered conservative. For recreational users on the Wharekirauponga Walk and the Wharekirauponga Track, noise levels from construction activity at the vent raises may be just audible, but only for a small number of days, and likely only for part of the track. We understand that there are no other walking tracks where construction noise would be audible in these areas and therefore noise effects on recreational users within this part of the conservation area are limited. Based on the small area of conservation area affected and the short duration of the noise, we consider the noise effects to be reasonable. Figure 25: Proximity of walking tracks and recreational areas to WUG sites
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