Earthworks

PO1

Earthworks are undertaken in a manner that:

1. produces stable landforms and structures
2. maintains natural landforms
3. minimises height of retaining walls and batter faces
4. does not unduly impact on the amenity or privacy for occupants of the site or on adjoining land, and
5. does not unduly impact on the amenity of the streetscape.

AO1.1

Earthworks and retaining walls comply with the Engineering Design Planning Scheme Policy.

AO1.2

Retaining walls are certified by a Registered Professional Engineer of Queensland.

AO1.3

The extent of filling or excavation with a depth of 200mm or greater does not exceed 40% of the site.

AO1.4

Excavating or filling is no greater than 1m, and height or depth and the combined height of retaining walls and fences does not exceed 2m.

AO1.5

Soil to be used for filling if stockpiled for more than 1 month is stabilised and grassed.

AO1.6

Retaining walls are set back from any boundary and are stepped or terraced so that landscaping can soften the visual impact.

PO2

Earthworks maintain the efficiency of the road network and do not adversely impact upon residents or road infrastructure, including not creating any difficulty for access to the site.

PO3

Earthworks do not result in the contamination of land or water, and avoids risk to people and property.

AO3

No contaminated material or acid sulfate soil is used as fill.

PO4

Earthworks do not generate a dust nuisance.

Bridge and culvert work

PO5

Bridges and culverts for flood immunity minimise traffic disruption, improve public safety, consider fauna habitat movement and allow for bikeways during and after construction.

Road design

PO6

Roads providing access to the site are provided, constructed and maintained to a standard which is adequate for the traffic type and volume likely to be generated by the activities on site.

AO6

External road works are provided in accordance with the requirements of the Engineering Design Planning Scheme Policy.

Erosion and sediment control

PO7

Earthworks do not create or worsen any flooding, drainage issues, ponding or an increase in flow directions or volumes, on the site or adjoining or nearby sites to ensure that:

1. environmental values and water quality objectives of receiving waters within or downstream of the proposal are protected or enhanced during the construction, operation and maintenance phases, and
2. The release of sediment–laden stormwater for all land disturbances is minimised through the use of all reasonable and practicable erosion and sediment control measures with degraded areas reinstated.

AO7

Earthworks comply with flooding, drainage and erosion sediment control requirements of the Engineering Design Planning Scheme Policy.

PO8

Construction activities for the development avoid or minimise adverse impacts on stormwater quality.

AO8

The release of sediment–laden stormwater is avoided for the nominated design storm, and minimised when the nominated design storm is exceeded, by addressing design objectives listed below in Table 9.3.5.3.2 (construction phase) or local equivalent, for:

1. drainage control
2. erosion control
3. sediment control, and
4. water quality outcomes.

Note—An Erosion and Sediment Control Plan (ESCP) is prepared by a suitably qualified person that demonstrates:

• erosion and sediment control practices (including any proprietary erosion and sediment control products) are designed, installed, constructed, operated, monitored and maintained, and any other erosion and sediment control practices are carried out in accordance with local conditions; or
• how stormwater quality will be managed in accordance with an acceptable regional or local guideline so that target contaminants are treated to a design objective at least equivalent to this Acceptable outcome.

PO9

Progressive rehabilitation of disturbed areas within the site is undertaken, as part of the completion of each stage of development, or where there are no stages, prior to the issuing of certificates of classification for building work or certificates of completion for operational work.

PO10

Development provides for a comprehensive rehabilitation program which ensures that disturbed areas are stabilised, temporarily and long term, within reasonable timeframes to minimise erosion on site and sediment discharge from the site.

AO10

Development provides the following:

1. Erosion control is undertaken in a staged manner, such that disturbed areas are exposed for 30 days or less, in accordance with the Engineering Design Planning Scheme Policy
2. Grading and reshaping of the disturbed areas to provide controlled and stable drainage flow paths
3. HIgh velocity flows are diverted away from distrurbed areas, and
4. The site is long term stabilised by preparing the site for planting, re-spreading stored topsoil stripped from the site or new topsoil, planting the disturbed area with native species of grasses, ground covers and trees, and placing mulch..

PO11

Premises in rural areas adopt a comprehensive approach to soil erosion and sedimentation management by:

1. avoiding land clearing or earthworks in the riparian corridor to a designated stream
2. avoiding land clearing and earthworks on land with a slope steeper than 15%
3. minimising the extent of disturbance on, or the stabilisation of slopes steeper than 10% (or 1:10)
4. managing and controlling surface drainage by using natural flow paths
5. rehabilitating disturbed areas as soon as practical after completion of works by re–establishing the vegetation including seeding with native grasses, ground covers and trees and spreading mulch over the surface, and
6. constructing ponds or small dams off natural flow paths, for collection of surface drainage from areas disturbed for prolonged periods, such as depots, quarries, and stock sales yards.

Weed control

PO12

Weed control practices and plant and equipment cleaning and inspection protocols are:

1. implemented to avoid the introduction and spread of weeds along transport routes and delivery points, and
2. undertaken to control existing declared weeds and pest animals prior to the commencement of and during works.

AO12

Reasonable steps have been taken to ensure that the vehicle or 'thing' being moved by road is free of reproductive material of any Class 1, 2 or 3 declared weeds. For example, compliance with the Queensland Guideline for Limiting Weed Seed Spread (DNR 2000).

Amenity, acoustic and air quality

PO13

Development is planned, designed and managed to ensure emissions and odours from activities achieve the appropriate air quality and noise objectives (measured at the receptor).

Note—These levels are in accordance with the Environmental Protection (Air) Policy 2008, and Environmental Protection (Noise) Policy 2008.

AO13

No acceptable outcome is nominated.

PO14

Development does not generate vibration from activities that will affect the amenity of surrounding land uses.

AO14

The development does not result in vibration impacts outside of the development site.

Lighting

PO15

External lighting is provided in urban areas to ensure a safe environment.

AO15

Technical parameters, design, installation, operation and maintenance of outdoor lighting comply with the requirements of AS4282 – Control of the Obtrusive Effects of Outdoor Lighting.

PO16

Outdoor lighting does not cause undue disturbance to any person, activity or fauna because of emission, either directly or by reflection.

AO16

The vertical illumination resulting from direct, reflected or other incidental light coming from a site does not exceed 8 lux when measured at any point 1.5m outside of the boundary of the property at any level from ground level up.

Operational works and electricity infrastructure

PO17

The excavation, filling or laying of pipes within the vicinity of electricity supply infrastructure will not create potential damage or hazard.

Note—Development involving filling, or excavation or laying of metal pipes on land contiguous to electricity supply infrastructure should be referred to the relevant electricity entity for safety advice on the proposed development.

AO17.1

Excavation of filling does not occur within:

1. 10m of any tower, pole, foundation, ground anchorage or stay supporting electric lines or associated equipment
2. 5m of a substation site boundary
3. 2m of a padmount substation, or
4. 1m of a padmount transformer or an underground cable.

AO17.2

The laying of metal pipes does not occur within:

1. 5m of any pole, tower, foundation, ground anchorage or stay supporting electric lines or associated equipment
2. 15m of any substation site boundary, or
3. 5m of, and parallel to, an electric line shadow.

1. Design life and design storm for temporary drainage works:
   1. disturbed area open for <12 months—1 in 2–year ARI event
   2. disturbed area open for 12–24 months—1 in 5–year ARI event
   3. disturbed area open for > 24 months—1 in 10–year ARI event
2. design capacity excludes minimum 150mm freeboard
3. temporary culvert crossing – minimum 1 in 1–year ARI hydraulic capacity.

1. Minimise exposure of disturbed soils at any time
2. divert water run–off from undisturbed areas around disturbed areas
3. determine the erosion risk rating using local rainfall erosivity, rainfall depth, soil–loss rate or other acceptable methods
4. implement erosion control methods corresponding to identified erosion risk rating.

Sediment control measures

Design storm for sediment control basins

Sediment basin dewatering

1. Determine appropriate sediment control measures using:
   1. potential soil loss rate, or
   2. monthly erosivity, or
   3. average monthly rainfall
2. collect and drain stormwater from disturbed soils to sediment basin for design storm event:
   1. design storm for sediment basin sizing is 80th% five–day event or similar
3. site discharge during sediment basin dewatering:
   1. TSS < 50 mg/L TSS, and
   2. turbidity not >10% receiving waters turbidity, and
   3. pH 6.5–8.5.

1. Avoid wind–blown litter; remove gross pollutants
2. ensure there is no visible oil or grease sheen on released waters
3. dispose of waste containing contaminants at authorised facilities.