Review of Environmental Factors - Camden Valley Way Upgrade and Liz Kernohan Drive Extension (Final) - Flipbook - Page 53
6.11.5 Recommendation 2:
Pre-construction and during construction, a Landscape Management Plan to ensure cost effective
and consistent management of landscape works is to be developed and implemented during
construction.
6.12 HYDROLOGY, FLOODING AND WATER QUALITY
6.12.1 Existing Environment
The project area is located in the Nepean River sub-catchment of the Hawkesbury Nepean
catchment. There are watercourses in proximity to the project (Herbert Rivulet and Oxley Rivulet)
and subsurface drainage is evident. It is noted that designs for Herbert Rivulet will be considered
and developed outside the scope of this project.
6.12.2 Impact Assessment
It is not envisaged that any changes to flows will have a significant impact on local flooding or
drainage. As appropriate safeguard measures will be implemented during the construction phase of
the project, it is anticipated that the activity will not have an unacceptable level of impact on the
flow paths and existing hydrology of the locality.
6.12.3 Mitigation Measures
The following mitigation measures are proposed for hydrology, flooding and water quality
management.
6.12.4 Recommendation 1:
Pre-construction and during construction, a Soil and Water Management Plan (SWMP) is to be
prepared in accordance with the relevant standard and implemented as part of the Construction
Environment Management Plan (CEMP) for water quality impacts by the Project Manager. The SWMP
will identify all reasonably foreseeable risks relating to soil erosion and water pollution associated
with undertaking the activity and describe how these risks will be managed and minimised during
construction. This will include arrangements for managing pollution risks associated with spillage or
contamination on the site, the laydown areas and the adjoining areas and monitoring during and
post-construction.
6.12.5 Recommendation 2:
Pre-construction and during construction, a site-specific Erosion and Sediment Control Plan (ESCP)
is to be prepared and included in the SWMP and CEMP for water quality impacts by the Project
Manager. The ESCP is to identify detailed measures and controls to be employed to minimise erosion
and sediment control risks including, but not necessarily limited to runoff, diversion and drainage
points. The ESCP will also include arrangements for managing wet weather events, including
monitoring of potential high-risk events (such as storms) and specific controls and follow-up
measures to be applied in the event of wet weather.
17/065 | Revised REF: Camden Valley Way Road Widening Works
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