B-7 – Area 7 - Assessment of Environmental Effects 25 m³/day. Large areas of the Ruahorehore Stream catchment have been drained with artificial channels. A constructed farm pond, originally a constructed silt pond developed as part of the TSF1A construction programme, is located within the footprint of Area 7 and now provides a source for stock watering. Figure 16: Hydrological setting of Area 7. Localised watercourses within and adjacent to Area 7 are shown in Figures 17 and 18. Two un-named, spring-fed tributaries flow south out of SNA166 at the northern extent of Area 7 and converge forming a tributary within the proposed footprint of TSF3. The tributary flows south through Area 7 via farm drains to join the Ruahorehore Stream. The farm drains are shallow with typically very low to no flow baseflow. From its convergence with these farm drains, Ruahorehore Stream flows west, around the toe of the existing TSFs, under Baxter Road and into the Ohinemuri River at Black Hill.
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