Dewatering Management Plan

                                                                                            ADG Consulting Pty Ltd


2    Site characteristics
2.1 Property description
     The site is described as Lot 2 on SP281580 and is situated at 11 Ravenwood Dr, Noosa Heads, Queensland.
     From recent available aerial mapping (Nearmap), the site was recently cleared between June and October
     2024, previously occupied by a multi‐storey residential dwelling, and the site is generally rectangular in
     shape. The site has a total area of 622 m2 and is shown in Figure 1, Appendix A.
2.2 Surrounding environment
     The surrounding environment and land use is described briefly in Error! Reference source not found..

     Table 1 Surrounding land use and environment

              Direction                                              Environment

                North             Easement, then existing residential housing.

                 East             Canal watercourse connected to Noosa Inlet/Noosa River.

                South             Existing residential housing, then Mossman Court.

                West              Ravenwood Drive, then existing residential housing, then canal watercourse
                                  connected to Noosa Inlet/Noosa River.

2.3 Topography
     The site and surrounding land is considered to be generally level, consistent with previous residential
     land use and recent demolition.
2.4 Geology & soils
     The surface geology at the site is mapped as being Anthropocene‐aged gravel, sand and silt; man‐made
     deposits generally associated with land‐fill or mining (tailings, dumps and rehabilitated areas). The
     dominant rock type is identified as a stratified unit of man‐made miscellaneous unconsolidated deposits
     as referenced through detailed surface geology (accessed via Queensland Globe online, 20 February
     2025).

     The Acid Sulfate Soils (ASS) map 1:100,000 scale categorises the site as ‘SEA’/’SDL’ or ‘Disturbed Land
     with probability of ASS’, indicating that the site is likely to contain acid sulfate soils but the type and depth
     to ASS has not been defined (accessed via Queensland Globe online, 20 February 2025).
2.5 Hydrogeology
     A search of groundwater bores licensed by DLGWV was conducted by ADG on 20 February 2025. The
     search identified no licensed bores within a 200 m radius of the site. A map showing the bore search area
     is provided in Appendix B.

     Based on the local geology and topography, and the site’s proximity to the canal and the Noosa River, the
     inferred groundwater flow is to the east. Groundwater beneath the site is likely to be hydraulically
     connected to the canal, therefore saline groundwater conditions are anticipated, and additional saltwater
     intrusion is likely to occur during dewatering.




ADG1786.25 Dewatering Management Plan_Rev0_20.02.25                                                             Page 3