Estimating the proportion of Archey’s frogs in the Wharekirauponga mine vibration footprint 18 Table 10. Areas of NZ LRI vegetation types in the predicted vibration footprint for the proposed Wharekirauponga mine. Veg. Type ha (%) Dominant Veg. Type ha (%) Catchment Wharekirauponga M 1, n 5 122.9 (39.0%) M 1 156.3 (49.6%) M 1, N 5 33.4 (10.6%) N 2 146.3 (46%) N 2, n3a 89.7 (28.5%) N 2, m 6 62.0 (19.7%) All Veg. 302.6 (96.1%) Waiharakeke N 2, n3a 89.7 (28.5%) N2 5.4 (1.71%) N3a 6.9 (2.2%) N3a 6.9 (2.2%) All Veg. 12.3 (3.9%) All 314.9 Both 12.3 (3.9%) The Wharekirauponga mine’s vibration footprint will be affected by vibrations for eleven years, 2026 to 2036, with the area affected by vibrations ≥2 mm sec-1 peaking at 282 ha during 2032. Higher vibration levels extend over smaller areas for fewer years (Figure 9 & Table 11). The highest expected vibration level of ≥20 mm sec-1 will only be felt in the Wharekirauponga catchment during two years 2027 and 2028, when it will extend over only 1.91 ha and 0.02 ha. The next highest vibration level, ≥15<20 mm sec-1, will be felt for six years (2027–2030, 2032 & 2033) over a maximum of 3 ha in any one year. The Waiharakeke catchment will only be affected by vibrations at the lowest levels (≥2<4 mm sec-1) for two years, with 0.02 ha affected during 2025 and 12.3 ha during 2026. A high proportion (48.3%) of the area affected by vibration (Table 12) will only be subject to the lowest vibration level (≥2<4 mm sec-1). Only 3.3% of the area will be subject to vibration levels ≥15 mm sec-1. It should be noted that most vibrations from blasts are less than the maximum value indicated by the contour[32].
RkJQdWJsaXNoZXIy MjE2NDg3