2016-07-18 General Committee Meeting - Item 3 - Attachment 1 - Flood Management Plan

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                                                             The contributing catchments of Six Mile Creek are




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                                                             predominantly rural land uses and bushland with




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                                                             watersheds originating from the relatively steep hillsides
                                                             of the area and often inundating low lying property and
                                                             roadways. The Six Mile Creek watercourse and floodplain
                                                             intersects several significant hinterland road networks,
     Flooding in                                             such as Louis Bazzo Drive, Pomona Kin Kin Road and
        Noosa                                                Queens St Cooran.

                                                             Flooding in Six Mile Creek is solely the result of rainfall
The Noosa Council local government area is divided by        runoff and local terrain and features. The waterways of Six
catchments contributing eastwards to the Noosa River or      Mile Creek are unaffected by any tidal conditions.
westward towards the Mary River. Approximately two
                                                             Flood levels in the Noosa River are determined by heavy
thirds of the Noosa River catchment lies within the Shire
                                                             rainfalls generating catchment runoff which drain into
boundary with the remainder extending to the north
                                                             the Noosa River system. Elevated water levels in Laguna
above Lake Cootharaba and draining from the sands of the
                                                             Bay, principally due to storm surge, can cause flooding
Cooloola National Park within Gympie Regional Council.
                                                             in the lower reaches and also impede the discharge of
Refer to Figure 2.
                                                             rainfall derived floodwaters from the river. Local flooding
Six Mile Creek flows northwest from the southern             refers to flooding along the upper reaches of creeks and
boundary of the Shire and is the largest waterway draining   waterways. Local flooding is caused by heavy rainfalls
the western portion of the Shire towards the Mary River.     over local upstream catchment areas and may not be
The Six Mile Creek catchment to Cooran is over 185 km2       associated with flooding from the river.
in area, bordered by Mount Tinbeerwah to the east, Black
Mountain to the south and the Kin Kin Creek catchment
to the north. Six Mile Creek includes two significant
tributaries of Cooroy Creek and Cooroora Creek and the
Lake Macdonald water supply dam owned and operated
by SEQWater. The dam was built in 1965 and its ungated
spillway raised in 1980 to increase the dam’s storage
capacity. The hinterland settlements of Cooroy, Pomona,
Lake Macdonald and Cooran were founded adjacent to the
local water courses of the area and hence have inherited
some vulnerability to flooding.




                                                                           Noosa Council | Flood Management Plan | Page 7