This work package systematically reviews, updates, and amends the technical guidance on methods used for mine closure that will be linked to the Closurematic system. This work is mainly carried out in the based new web pages where the majority of the technical information is collected. However, external, freely available info will be linked as well, where desired and possible. The main categories of closure technologies fall under titles such as water management, waste management, water treatment, monitoring, safety, and soil remediation. This WP also creates the links with WP2 and WP4 so that appropriate technical information is available for the user in the correct context.