16-001014-02A (Ultimate SCMMP)

2.3       OPERATIONAL PHASE / MAINTENANCE
Outlined below are the proposed procedures and methodology for the operational management and maintenance of the
Central WQCP proposed as part of Stage 2 of the development. Performance indicators for managing mosquitos and
cyanobacterial blooms are also specified.

2.3.1     GENERAL MANAGEMENT & MAINTENANCE

As per the Letter Report (No. B14158.W.07L dated 8 October 2015), performance indicators, monitoring schedule and
reporting is generally consistent with Water by Design - Maintaining Vegetated Stormwater Asset (2012). In particular
Section 4.4 for constructed wetlands, plus reference to Appendix B for identifying and managing weeds (this includes
both declared and environmental weeds). An extract of this appendix has been provided in Appendix A.
Inspection Frequency
During the operational phase, inspections will be carried out at least every two months and for the first three significant
storm events during the first year of establishment. Visual inspections following this period are to occur at least three
times per year. At least two inspections are to occur between October and May, with another inspection between June
and September. If a rainfall event occurs with the total rainfall on any day exceeding 50mm, inspection should be made
not less than 24 hours and not more than 72 hours after the cessation of rainfall.
Records
Inspection and monitoring will only be useful if all data obtained is recorded accurately and maintained in a reliable
database. Monitoring of changes in vegetation will be an important, long-term feature of maintenance for the WQCP.
Field data should be recorded on appropriate sheets, examples of which are provided in Appendix A. Record sheets
should be duplicated and kept in two places.
As such the maintenance checklist, which is included in Appendix A, shall be completed and records of the inspection
shall be kept. Monitoring requirements have been based on and in accordance with Water by Design’s, Maintaining
Vegetated Stormwater Assets (2012).

Photographic documentation and mapping of vegetation types are also to be recorded annually to determine changes in
vegetation over time. Methods for mapping vegetation types include using line transects that can be easily re-located at
the SQID site each year, or by measurements from permanent points or features nearby.

The records of the inspections and maintenance shall be kept and reviewed periodically to determine if the maintenance
undertaken is ensuring the SQID is functioning as intended.
Weeds
All plant species that are undesirable in the WQCP are to be considered as weeds. Maintenance staff should be familiar
with the identification of all species planted in the pond and be able to correctly identify weeds and invasive species. If
any identified species are found growing in the constructed WQCP professional advice should be sought on the
identification of the plant and removal methods. Professional advice should also be sought as soon as weed control
measures appear to be failing.

Maintenance personnel will need to identify species of both terrestrial and semi-aquatic weeds common to the area. A
selection of the most likely weeds of issue has been included in Appendix A (an extract of Appendix B Identifying and
Managing Weeds in WBD’s Maintaining Vegetated Stormwater Assets, 2012). Both declared and environmental/nuisance
weeds are incorporated into this list. When weeds have been identified they are to be removed by hand immediately or
eradication methods scheduled before the infestation becomes larger and more difficult to control.




16-001014-02A | SMCMP | PALM LAKE RESORTS                        COOROY RETIREMENT COMMUNITY, TRADING POST
                                                                                             ROAD, COOROY                     |6