Robinson Sunny Park Coonamble Project

Robinson Sunny Park Coonamble Project is a soil carbon sequestration project located approximately 30km southeast of the township of Coonamble in the Central West region of New South Wales. Registered in March 2020, the project spans an area of over 5,400 hectares on the property "Sunny Park". The region is characterized by a mix of agricultural land uses, primarily extensive grazing and cropping of wheat and pulse grains, supported by the Coonamble district's semi-arid climate which features hot summers and cool winters.

The project operates under the Estimation of Soil Organic Carbon Sequestration using Measurement and Models methodology (2021). This method allows for a hybrid approach to crediting, where soil carbon stocks are initially measured via physical sampling, while subsequent increases can be estimated using approved models to reduce ongoing compliance costs. The project originally transitioned from the 2018 measurement-based method to this 2021 version in late 2022.

Environmental conditions in the Coonamble area typically support Vertosols (cracking clays) and Chromosols. Notably, the project's design specifically includes the application of gypsum to remediate sodic or magnesic soils, which indicates the presence of Sodosols or sodic subsoils, a common constraint in the region that gypsum helps alleviate by improving soil structure and water infiltration. Additional project activities include altering grazing intensity to promote vegetation cover and applying synthetic or non-synthetic nutrients to address soil deficiencies, all aimed at building soil organic carbon stocks.

An interesting aspect of this project is the proponent's active management of the project boundary; a variation in August 2025 removed specific areas from the project, likely to optimize the carbon estimation area or exclude non-compliant zones. The proponent, Adam Robinson Pty Ltd, appears to manage a portfolio of similar initiatives, holding other registered soil carbon projects in the same region.