MCU14/0056 - Attachment H -Economic Needs Assessment

                                                                                                             ENG
                                                 Engineering Report & Stormwater Management Plan
                                         Date:          16/06/2014     Document No.:     14012-ENG-01.Docx

                                          By:              AvT          Revision No.:              B


Manuals. A channelised right turn treatment (CHR) is proposed for Myall Street at the
entrance to the new development. This is for traffic travelling from North to South along
Myall Street. Dimensions are outlined in the traffic impact assessment report and to be
detailed as per Austroad’s: Guide to Road Design Manuals.

No external roadworks are proposed for Ferrells Road, however a new crossover will be
provided on Ferrells Road to service the new proposed multi-use development. The crossover
is to be concrete crossovers constructed to IPWEAQ standard drawing R-0051 Commercial
Driveway Slab Type A.

Internal roadworks are required for the new proposed multi-use development. Refer
attached Appendix B for proposed layout plans and details. Line marking and signage will be
used through the new proposed development to emphasise the intended direction of
vehicular flow in accordance with the Manual for Uniform Traffic Control Devices (MUTCD).


 5. Stormwater Drainage

It is proposed that the stormwater drainage for the proposed multi-use development will be
piped to individual bio-retention basins for each area. Refer attached Appendix B for
proposed layout plans and details. The stormwater from the service station, fast food outlet,
food store and car wash areas and the associated car parking will be treated in a number of
basins to the South of the car wash area, as well as landscaping around the car parking. The
stormwater from the self-storage unit will be treated in a basin to the East of this unit. The
stormwater from the internal roadway will be treated in a basin in the verge of the internal
road. And the stormwater from the tourist park will be treated in a basin to the East of the
tourist park along the edge of the existing overland flow path. All these individual bio-
retention basins will flow into a large single detention basin located to the South of the site.

It is proposed that this detention basin will then drain to the existing overland flow path at the
South of the site via a new concrete headwall channelling the stormwater towards the two
existing box culverts under Myall Street. For more details refer to the engineering plans in
Appendix B.

As indicated by Cooroy & Lake Macdonald Natural Resources Overlay (Map OM3.5), the site is
located within the Lake Macdonald water supply catchment.




A PO Box 26, Carina Q 4152                                                                   7|P a g e
E [email protected]
W www.vtce.com.au