RFI - Attachment B - Stormwater management Report · MCU20/0026

5    CO N CLU S IO N

This SWMP outlines how stormwater runoff from the site will be managed in order to not adversely
impact the receiving environment.

Minor flows from the roof of the proposed dwelling shall be directed to existing Council stormwater
infrastructure traversing the site via the construction of new on site drainage. Major flows from the roof
of the proposed dwelling and runoff from ground level areas shall be conveyed to an underground
detention and infiltration tank with approximately 2.1m3 detention capacity at the rear of the site. Runoff
from the tank shall discharge from the site either by infiltration or shall surcharge and fall across the
north eastern property boundary in a non-worsening manner per existing conditions, eventually
reporting to Sunshine Beach. The final layout & configuration of the tank shall be confirmed at the
detailed design phase.

Stormwater quality treatment shall be provided via best management practices. This could be achieved
by first flush diverters directing runoff for irrigation of landscaped areas and/or the installation of filter
baskets in field inlet pits. Based on the scale of the proposed development, and typical pollutants
produced, these measures are considered adequate.

By implementing the proposed stormwater management system, and providing adequate maintenance,
the downstream environment and neighbouring properties will not experience any adverse deterioration
of water quality as a result of the proposed development.




11 June 2020                             Stormwater Management Report                                     12
S20-023                                40 Park Crescent, Sunrise Beach