The Project
Due increase in demand at the Mt. Gambier Prison, this correctional facility has seen continuous growth in the past decade through several stages of expansion, with a total project value of $108m. WGA was the structural engineer for the prison expansion, which was designed in three stages.
Stage 1
Stage one consisted of new 108-bed accommodation, dining and security administration block, plus a separate new prison kitchen and laundry. The new prison accommodation facility in stage one was based on a shipping container model for cell accommodation and shower blocks. The use of containers allowed the option of off-site fabrication and fit out of the containers prior to delivery to site.
Stage 2
Stage two of the project commenced in 2013 and was located on an adjacent greenfield site and consisted of bulk earthworks, site establishment; security fencing three medium security accommodation blocks, support building, separate reception building and carpark. The accommodation blocks are made from reinforced blockwork with a bondek first floor. A number of alternative construction methods were examined but blockwork proved the most economical solution for Mt Gambier. The project was delivered in a multi-stage fast-tracked process using a Managing Contractor delivery method.
Stage 3
Stage 3 work commended in 2016 and involved a major expansion, adding 160 beds in new residential-style prison accommodation rooms. The overall project was delivered over multiple buildings and included five new double-storey accommodation units with a total of 80 dual rooms and recreational/kitchen areas. It also featured a 1400m2 support building, an indoor basketball court, new administration building outside the wire and refurbishing of the visitor and medical centres.
Technical Solutions
This project required a concentrated effort on the issue of potential voids (Karst Structures) in the underlying limestone which is a known risk in Mt Gambier. Specialised geotechnical studies were undertaken to provide a safe and risk-free solution. To provide resilience in the design, the footings were designed to allow for up to 50mm of movement at any point of any of the buildings.
Client Focus
WGA understands the important requirements of a “Defect Free and Low Maintenance Handover” for all correctional facilities due to the high-security operation environments. Over the past decade, our engineering team has worked closely with the Department of Correctional Services and the managing contractors to ensure a progressive and collaborated inspection process is in place throughout the duration of the design and construction timeline of each project. High attention to detail has ensured a secure and robust structural base building that our client can operate in with ease of mind.
The Mt. Gambier Prison Redevelopment is included in the following sectors & services.
Click on one to find out more about that sector or service.