Attachment 7- Site Based Stormwater Management Plan

Part 2: Construction phase — stormwater management design objectives for temporary drainage works

 

Ue AACE Eton eed eta ice eee Cem oe LiLe|
PU Tees
pee wi eliidird Phe smelt) pee Muar
Drainage structure 1in 2 year 1in5 year 1in 10 year
ARI/39% AEP AR1/18% AEP ARI/10% AEP
Where located immediately up-slope of an occupied 1in 10 year ARI/10% AEP

property that would be adversely affected by the
failure or overtopping of the structure

Culvert crossing 1in1year ARI/63% AEP

 

Part 3: Construction phase — stormwater management design objectives for emergency spillways on
temporary sediment basins

 

Drainage structure Anticipated operation design life and
PES
Reus Beaudry PEM Cy rd
Emergency spillways on temporary sediment basins 1in 10 year 1in 20 year 1in 50 year
ARI/10% AEP ARI/5% AEP ARI/2% AEP

Note: Refer to IECA 2008 Best Practice Erosion and Sediment Control (as amended) for details on the application of the
Construction Phase requirements. Advice should be obtained from a suitably qualified person e.g. Certified Practitioner in
Erosion and Sediment Control, or Registered Professional Engineer Queensland, with appropriate knowledge and experience
in erosion and sediment control design and implementation.

State Planning Policy page 81