PO1

Development:

1. ensures people and property are protected from landslide hazard originating from inside or external to the site
2. ensures the long term stability of the land
3. ensures access is not at risk from being permanently impeded by a landslide event
4. does not increase the risk of landslide to adjoining properties, and
5. incorporates appropriate building types and structures that minimise disturbance to the land.

Note—To achieve compliance with this performance outcome, a Geotechnical Report can to be prepared and certified by a RPEQ  in accordance with the Landslide Risk Management – Australian Geomechanics Journal.

AO1.1

Development is not located on that part of the land identified on the Steep land overlay.

OR

AO1.2

Where development is located on land identified on the Steep land overlay, a site-specific geotechnical report is provided that certifies:-

1. the stability of the site, including associated buildings and infrastructure, will be maintained during both the construction and operational life of the development;
2. the site is not subject to risk of landslide activity originating from other land, including land above the site; and
3. the development will not increase the risk of landslide on the other land.

 Note—The Geotechnical Report is to be certified by a RPEQ in accordance with the Landslide Risk Management – Australian Geomechanics Journal.

PO2

Paths, driveways and roads:

1. avoid the steepest parts of the land, and
2. are constructed to an appropriate standard to minimise landslide impacts, and
3. follow natural contours and minimise crossing with natural drainage lines.

AO2.1

Paths, driveways and roads do not traverse land with a slope exceeding 25%.

AO2.2

Paths, driveways and roads are sealed with asphalt, concrete or another type of hardstand where traversing a slope greater than 10%.

PO3

Earthworks:

1. minimises disturbance to the natural contours of the site and adjoining properties, and
2. do not increase the risk of landslide inside or external to the site.

AO3.1

Earthworks do not:

1. change the ground level more than 1m at any point
2. occur within 1.5m of any property boundary, and
3. result in retaining walls located within 3m of a property boundary, other than where retaining walls are less than 1m in height on a continuous vertical plane.

AO3.2

Where involving the construction of the roads, 2m is the maximum cut.

PO4

Development must have sufficient size to accommodate a dwelling house, outdoor recreation area and an on site wastewater treatment system.

AO4.1

Development is in accordance with a Reconfiguring a Lot Development Permit in which there is a Plan of subdivision and associated Operational Works (Earthworks) approval.

Note—The Steep land overlay mapping represents the best mapping information available at the time. It is acknowledged subsequent Reconfiguring a Lot and associated Operational Works (Earthworks) approvals may necessiate regular amendments to update the Steep land overlay mapping. AO4.1 recognises development may proceed in accordance with these approvals should the Steep land overlay mapping be triggered in the event the overlay mapping has not been updated. 

AO4.2

Where no Reconfiguring a Lot Development Permit and associated Plan of subdivision and associated Operational Works (Earthworks) approval applies to the land, development includes a building envelope that:

1. is not located on land steep than 15%, and
2. has a minimum area of 1,000m2, and
3. has a minimum dimension of 18m.

PO5

The manufacture or storage of hazardous material in bulk:

1. is not located on land, or in the immediate surrounds of land with a risk of landslide, and
2. does not represent a risk to people and property from landslide hazard.

AO5

The manufacture or storage of hazardous material in bulk is not located on land identified on the Steep land overlay map.

PO6

Development incorporates measures to minimise the landslide risk level by:

1. avoiding works on the steepest parts of the land, and
2. retaining existing vegetation.

PO7

Paths, driveways and roads are designed to:

1. follow natural contours and have the minimum length necessary, and
2. minimise the number of crossings of water courses and drainage lines.

PO8

Community infrastructure and emergency services are able to function effectively during and immediately after landslide events.