Revised Civil Engineering Response Cover Letter

Item 22.5. As per response to Item 22.3 above, the overflow zone in the detention basin,
which includes the riser pipe) is for stormwater to get into the tank and be attenuated by
the orifices in the riser pipe. This could be done without the inclusion of an internal baffle
wall to the tank but creates the possibility of more debris against the riser pipe outlet and
higher dependence on maintenance for the system to function properly. The flows through
the riser haven’t bypassed the detention tank, they are just reduced in unattenuated
volume into the overflow chamber for the above reasons. The design intention is to build
in some longevity and reduced maintenance practicality. The internal baffle wall can be
removed if it concerns Council how the tank will function.



We trust this satisfactorily addresses the above issues raised in Council’s Information
Request letter.




Yours sincerely,




____________________________________________
CAMERON LANDRETH – DIRECTOR (RPEQ 19358)
BEng (Hons), NER, RPEQ
For and on behalf of:
BARLOW SHELLEY CONSULTING ENGINEERS (AUST) PTY LTD
Enclosed:
Updated civil drawings Lot 4 Taylor Court, Cooroy (ref: 2123 R01-R11)




2123 – 3 Taylor Court, Cooroy                                                               5
CL/cl