Response to Information Request - MCU12/0184

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                                                                                    Callaghan & Toth

4.       WATER CYCLE MANAGEMENT PLAN

This development has been designed in accordance with Deemed to Comply Solutions               -




Stormwater Quality Management (South East Queensland) Version 1.0              -

                                                                                   May 2010.

To this end, 100% of the new roof area of 1.39 hectares will be connected to thirty two
rainwater tanks. Each tank will have a capacity of 50,000 litres.


The rainwater tanks will supply water to feed the chickens and will have a top up facility from
one of the five on-site dams.



It is estimated by Inghams Queensland that in summer each shed will require 13,000 litres
for the cool shed pads cells and a average 9,819 litres for drinking water (AVIAGEN Table 7)
i.e., 22,819 litres total daily use for 30,000 chickens (average shed size) therefore allow a
average 22,819 litres per shed per day. It is noted that sheds are not stocked all of the year
as there is a two week cleaning period after 7 weeks growing. As such the sheds are

stocked 71 % of the year.


Therefore Total water requirements are:


     .   22,819 litres/shed/day x 8 sheds x 0.71 =Total daily use of 130,394 litres.
     .   Total monthly use of 3,955,293 litres.


Rainwater tank security of supply and dam supply capacity has been calculated in
accordance with Appendix B of EN Health Guidelines on the use of rainwater tanks.


The attached calculations in Appendix 6 shows that the thirty two 50,000 litre tanks can
provide a 12.2% water supply security for the birds.

The attached calculations in Appendix 7 shows that the utilisation of just two of the seven
approximately 5000m3 dams on site can on its own supply 99% of the required water supply
for the chickens.


A minimum of 24 hours storage is required to ensure there is sufficient supply for the
chickens in the case of electrical failure. The thirty two 50,000 litre tanks (1,600,000 litres)
provide 12.2% of the security of supply for the bird’s water requirements and provide 12
days storage at average usage.

The tanks will have a top up facility from two of the seven dams to ensure security of supply.


5        FLOODING ASSESSMENT REPORT

5.1      Existing Conditions

This site is not subject to ponding of floodwaters from the adjacent channels and the Q1 00
year ARI flood levels. The buildings and carparks are above the Q100 year ARI flood levels.


5.2      Proposed Drainage System

The road surface level is proposed to be drained to either an underground drainage system
or to the verge via sheet flow. The        discharge will discharge to the existing Avocado Farm

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1209 Animal Husbandry   Top Forestry Rd, Ridgewood
                        -
                                                                                       SWQMP
April 2013