Mt Shamrock Quarry
Holcim’s Mt Shamrock Quarry produces high quality construction materials such as rail ballast, aggregates (for concrete and asphalt) and road bases that are essential for the construction of homes, roads, railways, bridges, marinas, hospitals, schools, shopping centres, and other infrastructure within our communities.
Community & Environment Enquiries
Victoria has a growing demand for construction materials due to major infrastructure projects as part of the Victoria’s Big Build and civil construction for housing and industrial developments in the south east growth corridor. In Victoria, there is a current shortage of suitable approved quarry materials that are in close transport proximity to meet the needs of these projects. Mt Shamrock Quarry is ideally located for ongoing affordable supply to residential and commercial developments.
Future resource investigation
In December 2024, The Department of Transport Impact Assessment Unit (DTP IAU) formally accepted Holcim's referral application to seek a determination under the Environment Effects Act 1978 if an Environmental Effects Statement (EES) is required for this extension project.
The referral documents and associated technical reports will be publicly available on the following website for viewing:
Department of Planning: Pakenham Quarry Extension Project (Referral Number 2024-R10)

Mt Shamrock Quarry: Work Authority Boundary Context (click to download larger version)
What is an EES?
An EES is the state’s most rigorous and transparent environmental assessment process and is typically reserved for complex projects that require assessment of a range of potential impacts. For projects with fewer potential adverse effects a tailored environment report might be required by the Minister. Where the potential significant effects of a project are well known, or limited, the Minister might require conditions to be met for the project to proceed or not require any assessment under the Act.
In order to prepare the application, Holcim produced the following key technical assessments:
- Air Quality
- Ground Water
- Landscape and Visual amenity
- Resource investigation
- Flora and Fauna
- Cultural heritage
The application details the outcomes of each assessment, how the site's current monitoring and mitigation measures apply, and details of any additional measures required in order to minimise any potential impact to the environment.
The application also provides information on the site history, community engagement and the reasons why this extension project is being undertaken.
Please note that this referral application does not constitute an application for a Work Plan Variation or Planning Permit, these have not yet been applied for.
Next steps
While the assessment is being undertaken by the DTP IAU, Holcim will continue to undertake technical studies which include but are not limited to the following environmental aspects:
- Surface water
- Erosion and sediment control
- Geotechnical
- Quarry staging and rehabilitation
- Noise & Vibration
- Blasting
The results of these technical assessments combined with the assessment outcomes from DTP IAU may change the final proposed pit shape and size (within the confines of the Work Authority).
Please note
Holcim is not considering any changes to its approved current operating hours which are:
- 7am-6pm Monday to Friday
- 7am to noon Saturday
- Blasting Monday to Friday 11am-12 Noon, and 2pm-3pm
- Critical maintenance can occur outside these hours
Holcim is not considering any changes to site access roads or truck routes in and out of the Quarry.
Keeping you informed
Holcim is committed to open dialogue with the community. Holcim will provide updates as soon as possible via the following pathways:
- Information website: www.holcim.com.au/mt-shamrock
- Consultation through the existing Environmental Review Committee (ERC) which meets quarterly
- All communications with the ERC and copies of all existing environmental performance are posted on the following website www.allpossibilities.com.au/holcim
- Email contact: au-mtshamrock@holcim.com
- Phone contact: 0439 381 724