OPW20.0191 NC IR response

It is proposed to block the drain under the main access until the main swale is
effectively stabilised.
The details of these swales have been included on the attached plans. The
longitudinal grade of these swales is approximately 1% and as such once stabilised
the stormwater velocities along the swales will not cause erosion.

The only portion of the table drain that is being modified is adjacent to the proposed
new culvert for the secondary access. Disturbed areas of this swale are proposed to
be vegetated to ensure that they are stabilised immediately. The vegetation process
is proposed to be the same technique as the vegetation for the main swale.

The two stormwater outlets into Kinmond Creek are located on the western portion of
the site and as an outlet from the large sediment dam.

The outlet on the eastern portion of the site has been stabilised by the use of large
boulders that extend to the invert of the stream. These boulders will assist in
reducing stormwater velocities. Figure 6 and 7 show the protection located at the
outlet of the culvert and along the swale to Kinmond Creek.




Figure 6 – The outlet to the culvert located near the Western boundary




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