Cleaning and Maintenance of Green Adelaide Water Management Assets 2027–2031

Overview Green Adelaide, within the Department for Environment and Water (SA), is seeking an environmental services supplier to perform the cleaning, maintenance and ongoing asset management of gross pollutant traps (GPTs), sediment basins and fishways under the responsibility of Green Adelaide, for a contract term of up to four years until 30 June 2031. Objectives Respondents are expected to provide a tender response that fulfils the following objectives: Contribute to maximisation of removal of gross pollutants and sediment to achieve ecological benefits to the receiving waters in each applicable catchment Improve cost benefit efficiencies in achieving the objectives Preserve and improve the efficiencies of the investments already made by Green Adelaide and the Department for Environment and Water (DEW) in GPTs, sediment basins and fishways Contribute towards Green Adelaide's key priorities and ultimately the five-year Green Adelaide Regional Landscape Plan Scope The contract covers the type of assets detailed in Section 1.1, with each asset listed in Section 3.1 and further details provided in Appendix 1, where the asset summaries reflect the latest condition assessments as of December 2025. In addition to the constructed assets, there is from time to time a requirement for the clean-up of urban watercourses, including but not limited to River Torrens, Brown Hill and Keswick Creeks, Parklands Creek, Glen Osmond Creek, and the Patawalonga Lake System. The Public Authority will only direct the Supplier to undertake work on urban watercourses where it is the agent for the landowner (for example, where the landowner is the Minister for Environment and Water or equivalent) or where it has the permission of the landowner. The Supplier can request evidence of this permission from the Public Authority prior to commencing work. The contract may require the Supplier to undertake the following components of work: Asset inspections Asset cleaning Urban watercourse inspections Urban watercourse clean-up Sediment removal Planned asset maintenance Unplanned asset maintenance Asset condition assessments Reporting Decommissioning assets Commissioning and/or installation of assets Contract Terms and Conditions Contract term of up to four years, until 30 June 2031