Attachment C - Stormwater Management Plan - 30-32 Doonella Street_SMP-revA_full (00016826)

!




Executive!Summary!
!
AquaIntel' Pty' Ltd' was' commissioned' by' TOD' Consulting' on' behalf' of' Serina' Pty' Ltd' to'
prepare' a' Stormwater' Water' Management' Plan' (SMP)' to' support' the' Material' Change' of'
Use'application'(MCU15/0053)'for'unit'development'at'30K32'Doonella'Street,'Tewantin.'''
'
The'site'is'currently'occupied'by'a'number'of'residential'units'with'a'few'trees'and'grassed'
area.''The'site'grades'from'the'north'to'south'and'currently'runoff'from'the'site'largely'sheet'
flows'to'the'frontage'of'site'along'Doonella'Street.'''
'
Environmental' best' management' practices' are' proposed' for' treatment' of' stormwater'
flowing'through'the'site.'Stormwater'will'be'treated'by'a'number'of'treatment'devices'prior'
to' discharge' to' the' receiving' environment.' The' stormwater' treatment' strategy' for' the' site'
will'include'collection'of'runoff'from'roofed'areas'in'a'15kL'rainwater'tank'for'irrigation'reK
use,' with' overflows' and' flows' from' other' areas' on' site' directed' to' a' bioretention' system'
located'at'the'outlet'to'the'site.'''
'
NonKworsening'of'peak'flows'from'the'site'has'been'demonstrated'through'the'incorporation'
of'a'detention'system'located'above'the'bioretention'system.'''
'
This'Stormwater'Management'Plan'demonstrates'that'effective'treatment'of'stormwater'at'
the'proposed'development'can'be'achieved'through'the'application'and'appropriate'design'
of' Water' Sensitive' Urban' Design' (WSUD)' principles' in' accordance' with' legislative'
requirements' and' best' practice' guidelines.' The' treatment' train' proposed' for' the'
development'site'achieves'the'performance'criteria'set'by'the'Noosa'Shire'Council.''Through'
the'implementation'of'detention'systems'within'the'catchments'nonKworsening'criteria'has'
been'achieved'to'ensure'no'downstream'impacts.'
!                                    '




                                                                                                      !