Project Hurunui Wind Construction and Project Overview

Project Hurunui Wind Construction Effects and Management Report
comprise extensive earthworks with sidling cuts up to approximately 17m in height as
shown on Photograph 5 in Appendix B.
Once the route leaves the tight bend it continues to traverse the ridge in a sidling cut to the
ridge top at a gradient of approximately 15%. From this location the route generally follows
the ridge in a series of cuts and fills to join with Road A at Turbine A11 as shown on
Photographs 6, 7 and 8 in Appendix B.
Road A
Road A is typically 6m wide (apart from the section between Turbines A11 and A9) and
generally runs along one of the two main project ridgelines running in a north-east to southwest
direction. Road A begins in the northeast section of the site at turbine A11 and
terminates at the southwest section of the site at turbine A1.
Road A runs along gentle to moderately undulating terrain in a series of moderate cuts and
fills from Turbine A11 to Turbine A8. The maximum gradient along this section is
approximately 15% just prior to Turbine A8 with a corresponding maximum cut height of
approximately 5m. Photograph 23 in Appendix B illustrates Road A between Turbines A9
and A10 while the section just prior to Turbine A8 is shown on Photograph 13 in Appendix
B.
Between turbines A8 and A7 Road A generally descends following the ridgeline reaching a
maximum gradient of about 13% prior to leveling out at Turbine A7. Beyond Turbine A7
Road A descends at approximately 14% before rising along the ridgeline south towards
Road C and Turbine A6. The section of Road A beyond Turbine A7 is illustrated on
Photograph 14 in Appendix B.
From Turbine A6 Road A descends gradually to turbine A2 generally following the broad
ridgeline in minor cuts and fills. This section is shown on Photographs 15 to 20 in Appendix
B.
The final section of Road A from turbine A2 descends at a moderate gradient before rising
sharply to turbine A1 which is located at the top of a steep sided knoll. In order to reach
turbine A1 a box cut with a maximum cut height of approximately 7m will be required at a
maximum gradient of approximately 20%. This section is illustrated on Photographs 21 and
22 in Appendix B.
Road B
Road B follows a secondary ridgeline which branches off from Road A between turbines A4
and A3. Road B crosses the upper reaches of a gully, which will require a fill embankment
and culvert, approximately 100m from its intersection with Road A. Road B descends at a
moderate gradient reaching a maximum of 13% before leveling off to access Turbine B1.
This section is shown on Photograph 24 in Appendix B. From Turbine B2 Road B
descends for approximately 300m before climbing at a gradient of about 15% in a box cut
with a maximum cut height of 5m over a distance of approximately 100m. The remaining
section of Road B is relatively flat as it terminates at Turbine B1. Photograph 25 in
Appendix B illustrates Road B at Turbine B1 while Photograph 26 shows Road B as viewed
from Turbine A1. Road B is 6m wide.
5C-1604.02
February 2011 19