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M045 Indian Ocean Drive – Kings Drive Intersection and 2 Passing Lanes Upgrade

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PROJECT INFORMATION

PROJECT SUMMARY

ASSESSMENT SCOPE

PROJECT DESCRIPTION

P ROJECT L OCATION

METHODOLOGY

P RELIMINARY D ESKTOP S TUDY

The decision whether or not to refer the project to the Commonwealth DSEWPC was based on whether the project would affect Commonwealth lands, or could have a significant impact on matters of national importance, which are protected by the EPBC Act. The DSEWPC protected property search was used to determine whether the project will impact items of national importance: (http://www.environment.gov.au/erin/ert/epbc/index.html) see appendix G for the results of this search and Chapter 7 for a discussion of the findings. The decision whether or not to refer the project to the state's EPA was based on whether the project would have sufficient impact on environmental factors to require referral under section 38 of the Environmental Protection Act 1986.

ASSESSMENT OF ASPECTS AND IMPACTS

A SPECTS AND I MPACTS

Not relevant to the proposed works, the project does not require the use of hazardous substances. Contamination A search of DEC's Contaminated Areas Database indicates that there are no identified contaminated areas within the project area.

METHODOLOGY

P RELIMINARY D ESKTOP S TUDY

CLEARING OF NATIVE VEGETATION

D ETAILS OF V EGETATION A SSOCIATIONS TO BE C LEARED

Passing Lane 2: The native vegetation along Passing Lane 2 (1.3 km long) is in mostly degraded to good (Keighery, 1994) condition with some areas of heavy weed infestation. Eucalyptus gomphocephala (Tuart), Banksia attenuata, Banksia sessilis (parrot bush), Nuytsia floribunda, Hakea trifurcata, Acacia pulchella (prickly moses), Acacia cyclops, Petrophile species and Xanthorrhoea species. Most of Passing Lane 2 is adjacent to cleared farmland with a small northeastern portion bordering native bushland.

Overall, the vegetation community of the project area was primarily closed Banksia forest with areas of scrub. Clearance of up to 7 acres for intersection improvement and passing lane construction on Indian Ocean Drive, Gingin.

Table 2: Existing Environment – Indian Ocean Drive – Kings Drive Intersection and 2 Passing  Lanes Upgrade
Table 2: Existing Environment – Indian Ocean Drive – Kings Drive Intersection and 2 Passing Lanes Upgrade

A SSESSMENT A GAINST THE 10 C LEARING P RINCIPLES

Based on the above, the proposed cleanup is not likely to be inconsistent with this Principle. Given the above and given that the project area is a small linear section of native vegetation in varying conditions over a 20 km section of road, the proposed clearing is not likely to contravene this Principle. Given the small amount proposed to be cleaned, the project is unlikely to contravene this Principle.

Given the highly vegetated surrounding lands and the small area proposed to be cleared, the project is not considered an important ecological linkage. Given the distance and that no riparian vegetation was noted during the site inspection, the proposed project is unlikely to be in breach of this Principle. Given the small size of the project area and the limited land degradation risks, the proposal is unlikely to conflict with this Principle.

In the light of the above, it is unlikely to be contrary to this principle. Given the sandy well-drained soil and the thin linear section proposed for clearing, it is unlikely to contravene this principle.

ADDITIONAL ACTION REQUIRED

Native vegetation should not be cleared if the clearing of the vegetation is likely to have an impact on the environmental values ​​of any adjacent or nearby conservation area. The nearest conservation area is the Gnangara-Moore River State Forest located 1.5 km east of the project areas. Given the highly vegetated surrounding fields and the small area proposed to be cleared, the project is not considered to be an important ecological link and is unlikely to impact on the environmental values ​​of the nearby conservation areas.

The Kings Drive intersection is in the Woodridge Public Drinking Water Source Area (P3) and RIWI Moore River Surface Water Area. Due to the small amount of cleanup and the surrounding heavily vegetated area, it is unlikely that groundwater will be affected by the cleanup required for this project. The nearest surface water is the Moore River 2 km north and west of the project areas.

Due to the distance and the small amount of clearing, it is unlikely that there will be any deterioration of the surface water. Method MRWA Site Inspection (2012) Hydrography, Linear. j) Native vegetation should not be cleared if clearing the vegetation is likely to cause or exacerbate the occurrence or intensity of flooding. Indicates the assessment that the clearing is in violation of one or more of the principles of clearing.

Does the assessment indicate that the cleaning is contrary to the cleaning principle (g) soil degradation, (i) surface or underground water quality or (j) the occurrence of flooding? Will the project involve clearing for purposes deemed to be temporary in nature under condition 13 of CPS818.

ENVIRONMENTAL MANAGEMENT

COMMONWEALTH ASPECTS AND IMPACTS

DECISION TO REFER

R EFERRAL TO THE D EPARTMENT OF S USTAINABILITY , E NVIRONMENT , W ATER , P OPULATION

R EFERRAL TO THE E NVIRONMENTAL P ROTECTION A UTHORITY

STAKEHOLDER CONSULTATION

OTHER APPROVALS/PERMITS/LICENCES

The vegetation on the eastern side of IOD is in good (Keighery, 1994) condition with some weed infestation and on the western side of IOD it is in degraded (Keighery, 1994) condition with heavy weed infestation. Native vegetation within the Kings Drive intersection area includes Banksia attenuata, Banksia sessilis (parrot bush), Eucalyptus decipiens and Xanthorrhoea species. The western side of the King Drive intersection is adjacent to a strip (50-100 m wide) of Banksia attenuata and Banksia sessilis forest in good condition (Keighery, 1994) and the eastern side is adjacent to a row of pine trees and cleared farmland.

Native vegetation along Bypass 1 (2.3 km long) is in predominantly excellent to good (Keighery, 1994) condition with some areas infested with weeds. Native vegetation in Passing Lane 1 includes Eucalyptus todtiana, Banksia attenuata, Banksia sessilis, Nuytsia floribunda, Acacia pulchella, Petrophila species and Xanthorrhoea species. Native vegetation along Bypass 2 (1.3 km long) is in a predominantly degraded to good (Keighery, 1994) condition with some areas heavily infested with weeds.

The project area structure consisted of both mature and young Banksia trees with signs of natural regeneration in both the upper story and mid to lower story. Landforms – Some of the passing track 2 area had a medium relief, but the rest of the project area had a low relief due to the relatively flat undulating landscape. Disturbance/Impacts – Moderate to heavy level of weed invasion along the degraded parts of the project area.

The current road alignment was chosen to avoid several sections containing areas of Banksia forest in excellent to good condition (Keighery, 1994). Eucalyptus gomphocephala (Tuart), Eucalyptus todtiana (black shoot), Banksia sessilis (parrot bush), Macrozamia riedlei and Petrophile and Xanthorrhoea species. The area represents a Eucalyptus and Banksia woodland comprising Eucalyptus todtiana (black shoot), Banksia sessilis (parrot bush), Macrozamia riedlei and Petrophile and Xanthorrhoea species.

Area represents Banksia forest consisting of Banksia attenuata, Banksia sessilis (parrot bush), Eucalyptus todtiana, Macrozamia riedlei Acacia pulchella (prickly moses) and Petrophile and Xanthorrhoea species.

Fig  1.  Looking  south  in  Passing  Lane  2.
Fig 1. Looking south in Passing Lane 2.

DEPARTMENT OF AGRICULTURE & FOOD ADVICE ON DECLARED WEEDS

The project management measures defined in this EMP are in addition to the Standard Environmental Management Contract Specifications applicable to Category 2 projects. Where applicable, the Main Roads Standard Environmental Contract Specifications (Specifications and 304) should be followed. Please also note that all remedial works must be carried out in accordance with the Main Roads Environmental Directive.

Due to the scale and nature of the project, no contingency measures have been defined as the inherent environmental risks are low. Due to the scale and nature of the project, there is no need to audit the implementation of the EMP, as the environmental risks are low. Vegetation clearance Ensure that the overall objectives of the route and construction works are compatible with maintaining and, where possible, enhancing the biological integrity of the surrounding environment and minimizing vegetation loss.

Main Roads Project Manager Construction work to be carried out during the summer to reduce the possibility of. This vegetation will be used during any remedial works and will either be mulched or re-scattered in accordance with the TDP/remediation plan. If clearing is under a Principal Purpose Permit (CPS818), ensure compliance with section 14 of the Permit relating to dieback, other pathogens and weed control.

Surface drainage Maintain the hydrological regime that exists prior to the construction of the proposal. Access to private property and appropriate traffic management measures must be planned and implemented prior to the construction of works. Watering, the use of hydromulch or other forms of mulch to protect loose surfaces should be used as mitigation measures.

The designated service area shall be bundled to contain any spills or leaks and shall not be located in an area adjacent to any drainage areas or watercourses or shall drain into a temporary sump. All waste oil will be collected for recycling and any empty fuel/oil containers, used filters and waste hydraulic parts will be collected and stored in an allocated area and then removed to an approved site. The project areas, including hardstand areas, will be kept tidy at all times.

Contractor Main Routes A water tanker/firefighting unit will be on site at all times. Final clearance will be to the satisfaction of the Project Manager and Site Supervisor.

Figure

Figure 1 – Project Area
Figure 2 – Project Location and Study Area
Table 1:  Aspects and Impacts – Indian Ocean Drive – Kings Drive Intersection and 2  Passing Lanes Upgrade
Table 2: Existing Environment – Indian Ocean Drive – Kings Drive Intersection and 2 Passing  Lanes Upgrade
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