The project is to establish a clearance zone by selective removal of that vegetation that exceeds or may grow larger than 150 mm in diameter. It is proposed that a 6.5m clearance zone be established on straights and inside curves, and up to 15m outside curves on Albany Highway between Narrakine Road and Beaufort River Bridge. Albany Highway has been identified for establishing a clear zone based on accident statistics and the general proximity of vegetation to the roadway.
The Main Roads WBS Network Management team has researched the non-environmental aspects of the project, establishing proposed vegetation clearance widths using the Austroads Guidelines as a working basis. Under the Major Roads Environmental Assessment and Approval process, a Low Impact Environmental Screening Checklist has been completed for the proposal, refer to Appendix A. The project includes the removal of selected larger than 150mm diameter and trees/shrubs that may exceed 150 mm in diameter, within the maintenance area [6.5 meters from the boundary line of the closed surface] and the proposed clear zone [up to 15 m from the boundary line].
Only selected vegetation should be removed; below floor, and all other vegetation must be preserved. All material with a diameter of 200 mm and less shall be mulched and the resulting material spread in the adjacent road reserve.
P RELIMINARY D ESKTOP S TUDY
A PRELIMINARY ASSESSMENT OF THE PROJECT AREA AND ITS POTENTIAL
The water information officer of the regional office of the Department of Water was consulted on sensitive water sources (including public drinking water sources) to determine whether the project area supported or bordered major lakes, rivers, or wetlands or declared areas. There are no watersheds within the project that support urban dams or other water supplies for human consumption or other domestic use. Given the soil-damaging nature of the works on acidic sulphate soils: removal, disturbance or relocation of was not considered appropriate.
The Department of Agriculture and Food [Williams Field Officer] has been consulted to determine if there are known populations of reported plants or weeds of concern in or adjacent to the project area. As the project area receives > 400 mm of mean annual rainfall, advice on the overall dieback status of the project area was sought from the District Manager at the DEC Regional Office or by contacting the Ministry's Phytophthora Coordinator, see Appendix H.
C OMMONWEALTH R EFERRAL
S ITE I NVESTIGATION
The Western Australian Planning Commission's (WAPC'c) acid sulfate soil maps were reviewed and a self-assessment was carried out.
S ITE I NVESTIGATION
The term does not include vegetation that has been deliberately sown, planted or propagated unless required by law. Except for activities exempted under the clearing regulations, such as the clearing of vegetation less than 10 years old for maintenance purposes, generally all clearing of main roads is carried out by permit for the purposes of a statewide project.
A SSESSMENT AGAINST C LEARING P RINCIPLES
E NVIRONMENTALLY S ENSITIVE A REA (ESA)
With the generally degraded and exposed nature of the environment, native fauna will generally be minimally affected by the proposed works. Areas outside the project area should not be disturbed as part of the proposed works. The risk of these weed species spreading as part of the proposed work will be minimised.
A search of the DIA database identified no known sites of Aboriginal heritage significance in the vicinity of the project area. Wetlands DEC has advised that there are no wetlands in the vicinity of the project area. Provided that traffic management and signage are applied according to the standards of the major roads, none of the proposed works pose a significant threat to public safety.
Contamination Given the relatively shallow nature of the earthworks required, there appears to be a low risk of any significant contamination issues. This section of the report (PMM) is developed for the project area after the completion of the above sections.
C OMMUNICATION P LAN
Works related to the construction of the facility must not prevent public access along the adjacent reserve. Ensure that the construction of the proposal is managed to a standard that minimizes potential adverse environmental impacts. Construction Fire Ensure that the risk of fire associated with the construction of the proposal is minimized.
Ensure that the site is managed to ensure that the construction of the proposal will have minimal impact on the surrounding environment. The final clean-up must be to the satisfaction of the project manager and the construction manager. Monitoring of the identified weeds in the project area will include the use of input criteria listed below.
The Low Impact Review Checklist is part of the environmental assessment and approval process, see figure 2 in the Environmental Guidelines for Main Roads Environmental Assessment and Approvals. Information about the coverage of this report and qualifications regarding the data supporting this report is contained in the caveat at the end of the report. This section of the report summarizes matters of national environmental importance that may occur in or relate to the area you have named.
Additional information is available in the detailed section of the report, which can be accessed by scrolling or following the links below. This section of the report summarizes other matters protected by law that may relate to the area you have designated. As a place's heritage values are part of the 'environment', these aspects are protected by the EPBC Act.
A country's Commonwealth Heritage values Commonwealth Heritage and a country's heritage values on the National Heritage Register. This section of the report provides information that may also be relevant to the area you have named. Only selected species covered by the migratory and marine provisions of the Act are mapped.
Native vegetation should not be cleared if the clearing of the vegetation is likely to affect the environmental values of any adjacent or nearby conservation area. MAIN ROADS Western Australia PEIA & EMP for minor projects 38 of 41. i) Native vegetation should not be cleared if the clearing of the vegetation is likely to result in deterioration of surface or groundwater quality. Where we are not 100% sure, we use the PRECAUTIONARY PRINCIPLE in determining the potential effects of cleaning.
Any area of native vegetation that is not part of the area to be cleared for project activity and that is damaged as a result of clearing by the permit holder must be revegetated and rehabilitated.