Port Adelaide Sewer Rising Main

IC was engaged by Fulton Hogan Utilities (FHU) to undertake sampling and analysis of in-situ soil materials to support the construction of a proposed sewer upgrade. The proposed sewer alignment extends approximately 4.2 km from the SA Water wastewater pumping station at Port Adelaide and
terminates in an easement in Ottaway.
The sewer will be a rising main constructed using microtunnelling, with the depth of construction generally in the order of 3 to 4 metres below ground surface (mbgs). This construction depth and the proposed tunnelling process will generate excess soil cuttings and groundwater, and IC completed a series of tasks to inform the management of these materials, including: waste classification of soils within the sewer alignment to facilitate future off-disposal; acid sulfate soils assessment to provide guidance on required liming rates; and surface and groundwater assessments along the alignment to detail the chemical condition of groundwater and estimate infiltration rates for the excavation works and inform appropriate disposal options.
IC also completed an entry assessment for the project’s laydown yard established on Ocean Steamers Road.