New South Wales Consolidated Regulations

BLUE MOUNTAINS LOCAL ENVIRONMENTAL PLAN 2005 - REG 57

57 Stormwater management

(1) Consent shall not be granted to development that will alter the flow of surface or ground water, unless the consent authority is satisfied that the development incorporates effective measures to manage stormwater run-off for the life of the development and to ensure--

(a) surface water run-off will be diverted away from all disturbed areas on the site, and

(b) the quality of surface or ground-water leaving the site will not be reduced in the short or long term, and

(c) the development will minimise or eliminate point source and diffuse source pollution by the use of best management practices, and

(d) the development will not adversely alter the quantity and flow characteristics of stormwater leaving the site, and

(e) the development is designed and sited to minimise stormwater run-off from impervious surfaces leaving the site, and

(f) the development optimises on-site retention and re-use of stormwater run-off, through measures such as dual plumbing and infiltration devices.

(2) Consent shall not be granted to development (excluding minor additions) in the Living--Bushland Conservation zone or a Protected Area--Water Supply Catchment that increases the existing area of impervious or hard surfaces by more than 100 square metres or where the total area of impervious or hard surfaces of existing and proposed development exceeds 300 square metres unless the consent authority is satisfied that the development incorporates--

(a) effective measures for on-site retention of water with a collection capacity of not less than 4,000 litres per 100 square metres of hard or impervious surface (including paving) and for the re-use of water drained from those surfaces, or

(b) other measures for the retention of stormwater run-off and its appropriate re-use that have been designed by a suitably qualified person.

(3) Consent shall not be granted for development--

(a) involving the construction of three or more dwellings on any allotment, or

(b) for commercial or industrial purposes, with potential for discharge of pollutants such as fuels, heavy metals, oils, solvents and the like, or

(c) on an allotment having impervious surfaces in excess of 40 per cent of the allotment area,

unless the consent authority is satisfied that the development will be carried out in accordance with a stormwater management plan which identifies the measures that are to be incorporated to mitigate impacts of stormwater run-off, to maximise the use of water permeable surfaces and to promote infiltration of water on-site.

(4) The stormwater management plan is to maximise the use of water permeable surfaces on the site and be designed to promote infiltration of run-off water on-site.