Environmental Practices
COMMITED TO RESPONSIBLE ENVIRONMENT STEWARDSHIP
We seek to protect the environmental values of road reserves, minimise impacts on the natural environment, energy consumption and waste and conserve natural resources.
Key Performance Indicators
2009-10 | 2010-11 | 2011-12 | Ref | |
GRI Achievements | B | B (GRI checked) | B (GRI Checked) | 161 |
Scope 1 and 2 Emissions (t CO2) | 31,575 | 28,042 | 28,368 | 62 |
Electricity Usage (MJ) | 117,008,514 | 108,319,936 | 112,238,856 | - |
Fuel and Gas Usage (MJ) | 67,913,220 | 46,728,944 | 41,623,216 | - |
Note: Emissions calculated as per Department of Environment and Conservation requirements which align to the National Greenhouse and Energy Reporting Act 2007.
Recognition
2011 WA Environmental Awards
- Finalist 'Government Leading by Example' – New Perth Bunbury Highway Project
Introduction
Our commitment to responsibly managing our road operations is established through a corporate Environmental Policy, which addresses the principles of protecting environmental values, minimising impacts, energy use and waste, and conserving natural resources. The Environmental Policy is implemented throughout the organisation via management systems and processes. Our Environmental Policy Statement can be found on our website. Our environmental objectives are as follows:
- Implement a systems-based approach to environmental management
- Seek full compliance with all statutory environmental requirements
- Maintain or improve the biodiversity values of roadsides
- Minimise the impacts of noise associated with the road network
- Protect Aboriginal heritage values of road reserves
- Minimise the environmental impacts of materials used in road construction
- Maximise the efficiency of resources used by Main Roads
- Minimise impacts of roads on water quality.
Achievements
Managing Director's Sustainability Awards
The “How Sustainable Are You” competition is run as part of Sustainable September where entrants are asked to give examples of how they have supported sustainability and what the benefits were. The following were recognised for their efforts:
- Individual – Amy Walton and Tom Engelke for demonstrating a committed effort to supporting sustainability at home through recycling and energy efficiency.
- Project – Metropolitan ISA demonstrated a committed effort to reduce carbon emissions and energy consumption through the introduction of a dual battery system on their trucks.
- Branch or Region – Wheatbelt North Region demonstrated a commitment to sustainability in their projects and workplace through their recycling practices.
Property Management
Our commitment to improving environmentally sustainable performance in our offices, depots and housing has continued during the year. While we seek further improvements in the management of energy and water resources across our existing facilities, we are also building sustainability characteristics into new construction and refurbishment projects. Examples of this can be seen in the inclusion of solar power to recently completed residential projects; the adoption of thermally insulated wall and roof panels into designs for a new laboratory; and the trial of LED panels with a view to inclusion into an office refurbishment. Implementation and monitoring of these trial sites will continue and proven trials will be adopted as new standards.
Environmental Management of Road Projects
Environmental impact assessment is integrated into the road project planning and development process. Early screening indicates where preliminary impact assessment is needed, which then determines the need for detailed field investigations. Where impacts are likely to be significant, then referral to State or Commonwealth regulators occurs in accordance with statutory assessment and approval processes.
The table below indicates the number of road projects and assessment type. There were four instances of non-compliances this year. Three of them relate to the clearing of native vegetation while one concerns an Aboriginal heritage site.
Level of Environmental Assessment | 2009 | 2010 | 2011 |
Number of road projects subjected to environmental screening | 71 | 97 | 83 |
Number of road projects for which environmental impact assessment was conducted | 82 | 60 | 44 |
Number of road projects referred for possible assessment under State or Commonwealth legislation | 4 | 8 | 2 |
Number of road projects assessed under State or Commonwealth legislation | 1 | 4 | 1 |
Environmental Compliance | 2009 | 2010 | 2011 |
Number of environmental non-compliance instances | 9 | 12 | 4 |
Aboriginal Heritage
Planning and assessment of road projects includes researching Aboriginal heritage sites in the vicinity. Consultation with Traditional Owners, Native Title groups and the Department of Indigenous Affairs are important early steps in considering potential impacts. On-site meetings with community representatives also occur in order to understand the significance of heritage in an area and to avoid site disturbance wherever possible. This year, 35 formal meetings took place.
Carbon Reduction Plan-Climate Change Adaptation and Mitigation
We have developed a Carbon Reduction Plan and Target (5-15% reduction of 2010 levels by 2020) for our Scope One and Two emissions and have finalised a Climate Change Adaptation Plan for our business. Details of various initiatives and achievements that reduce our emissions and energy consumption can be found on our website under the Climate Change section.
Energy Usage and Greenhouse Gas
Scope 1 or 2 and 3 GHG Type (t CO2) |
|||
2009-10 | 2010-11 | 2011-12 | |
Fuel | 5,049 | 3,597 | 2,914 |
Street and Traffic Lights | 25,206 | 22,894 | 23,400 |
Buildings | 4,959 | 4,816 | 5,378 |
Air Travel | 462 | 496 | 513 |
Offsets | -4,954 | -1,753 | -4,535 |
Total | 30,722 | 30,050 | 27,670 |
Scope 1 or 2 and 3 GHG Type (t CO2) |
2009-10 | 2010-11 | 2011-12 |
Scope 1 | 4,661 | 3,160 | 2,803 |
Scope 2 | 26,914 | 24,882 | 25,566 |
Sub Total | 31,575 | 28,042 | 28,368 |
Scope 3 | 4,101 | 3,761 | 3,836 |
Offsets | -4,954 | -1,753 | -4,535 |
Total | 30,722 | 30,050 | 27,670 |
Note: 2012 fleet emissions yet to be offset.
The level of emissions for 2011-12 is on target for our 2020 goal. A total for our scope one and two emissions was to not exceed 31,575 t CO2 which was achieved with our calculated emission levels of 28,368 t CO2 . The result is due to initiatives rolled out as part of the Carbon Reduction Plan and largely as a result of the continued roll out of LED traffic signal lighting on the road network and fleet fuel use reductions.
Resource Conservation
Our main objective is to minimise the environmental impacts of materials use in road construction. Natural materials are crucial in road building. When obtaining road building materials, we endeavour to avoid clearing of natural vegetation, particularly high value vegetation.
This is achieved through strategic materials searches and extracting material from previously cleared or degraded areas where possible. The following table details the extent and type of materials extracted over the last three years:
Materials Extracted
Indicator | 2009 | 2010 | 2011 |
Imported road construction materials | |||
Sand (000s t) | 622 | 842 | 735 |
Gravel (000s t) | 1,422 | 89 | 1,161 |
Crushed rock (000s t) | 239 | 109 | 254 |
Limestone (000s t) | 251 | 320 | 144 |
Aggregate (000s t) | 89 | 60 | 48 |
Asphalt (000s t) | 372 | 68 | 83 |
Other (000s t) | 180 | 159 | 387 |
Kerbing, barriers, bridges and culverts | |||
Concrete (cubic metres) | 25,040 | 8,549 | 10,876 |
Other (000s t) | 3.01 | 4.65 | 1.49 |
Resources Recycled
Indicator | 2009 | 2010 | 2011 | Waste materials to landfill |
Kerbing (m) | 5,072 | 10,591 | 3,640 |
Pavement/footpath (m2) | 2,837 | 13,438 | 3,445 |
Existing seal (m2) | 73,894 | 88,817 | 215,265 |
Unsuitable material (m3) | 22,116 | 6,360 | 77,944 |
Other (m3) | 922 | 10,060 | 8,943 |
Recycled Materials | |||
Total (000s t) | 82.75 | 14.66 | 74.08 |
The non-homogenous nature of road projects and wide diversity of materials used across the State mean that it is not possible to make comparisons or draw trend analysis from one year to another.
Looking Ahead
- Continued development of a Sustainability Performance Framework.
- Continued deployment of a Carbon Reduction Plan and Climate Change Adaption Plan action.
- Seek to get a major project rated under the Australian Green Infrastructure Council's Infrastructure Sustainability rating scheme.
- Development of a Portfolio Sustainability Policy.