Crucifix toad found in Hera Mine study area
Crucifix toad found in study area

Client: Aurelia Metals Limited

Area: Western NSW, SW of Nyngan

Approval Type: State Significant Development

Years: 2011-2018

The Hera Project is a gold, silver, lead and zinc mine, along with a processing plant and related ancillary infrastructure.

OzArk EHM was involved in completing the initial surveys and reporting required to assess the scientific values present. The impact area is a 1,532 hectare area proposed for the operation of the Hera Mine.

Extensive flora surveys were undertaken, using scientifically approved methods and involved using quadrats and transects . Fauna surveys included spotlighting, dedicated bird surveys and herptofauna searches, Elliot and Pitfall trapping, Anabat detection, call playback and incidental observations.

Hera Mine typical vegetation - White Cypress Pine and Bimble Box
Typical vegetation - White Cypress Pine and Bimble Box

The results of the ecological assessment have been used in the development approval process.

Once the mine became operation, OzArk completed annual ecological and biodiversity monitoring on non-operational land.



Client: Central West Local Land Services

Area: Central West, Dubbo Regional LGA

Years: 2015 - ongoing

OzArk is working with the Central West Local Land Services (CW LLS) to assess the impact of cultural burning in travelling stock routes. Prior to burning commencing, and in conjunction with local Aboriginal representatives, OzArk Archaeologists carried out an Aboriginal archaeological assessment. Seven Aboriginal sites were identified and management recommendations provided.

OzArk Ecologists also worked with CW LLS staff before burning to determine  baseline ecological data.  Post-burn assessment is undertaken to be able to analyse data and determine the ecological impact of cultural burns. This is an on-going project with regular monitoring important to ensure replication and robust data analysis. CW LLS hope to apply the results across other travelling stock routes.

Biodiversity monitoring point 1 - pre-burn
Biodiversity monitoring point 1 - post-burn

DZP Field Assessment 1
Dubbo Zirconia Project Field Assessment


Client: Alkane Resources

Area: Toongi, Dubbo Regional LGA

Approval Type: State Significant Development

Years:  2012-on-going


The Dubbo Zirconia Project (DZP) comprises the development, mining and processing of zirconium, niobium and rare earth element resources located near Toongi, approximately 25km south of the town of Dubbo.

OzArk EHM carried out both archaeological and ecological impact assessment for a 2,500 ha study area, with an 800 ha impact footprint. This information was used for the Environmental Impact Statement required for development approval.

The heritage fieldwork component included surface survey and test-excavation, and required 90 person days. Representatives from the Registered Aboriginal Parties attended the fieldwork. 52 sites were identified in the study area, 33 of which were newly recorded.

DZP Field Assessment 3
Dubbo Zirconia Project Test Excavation

OzArk was involved with all aspects of assessing the scientific values, from field work through to numerous meetings with Aboriginal stakeholders, the project team and government regulators. OzArk was able to provide a detailed set of recommendations for this large study area that met the requirements of the government regulators and the approval of both the proponent and the Registered Aboriginal Parties.

One finding from the initial ecological fieldwork was the presence of the threatened species “Pink-tailed Worm-lizard” Aprasia parapulchella . OzArk has now designed and implemented an on-going monitoring plan for the Pink-tailed Worm-lizard prior to the construction and operation of the mine. This will allow translocation to occur for specimens found within the mine impact zone. Annual monitoring occurs after appropriate weather conditions are present.

Pink-tailed Worm-lizard artificial habitat monitoring site

In-conjunction with the Pink-tailed Worm-lizard monitoring, OzArk has begun monitoring the vegetation in the same sites to determine any association with vegetation structure and presence/absence of the species.

OzArk continues to work closely with the client to determine the best monitoring options available to meet approval requirements.