The Mijnwater scale up Masterplan phase 1 project aims at the development of a new heating and cooling grid in Heerlen in the Netherlands. This is a new geothermal energy exchange system that uses heat pumps to extract thermal energy (heat) from underground mine water, implemented by ENEXIS Holding NV and Mijnwater Energy BV. The project specifically aims to expand the '5th generation of Mijnwater district heating and cooling grid’ by: - Conducting the feasibility study and designing 6 new geothermal wells (3 warm and 3 cold wells) to ensure the necessary thermal capacity (approximately 37,000 to 43,000 kWth) is available for end-users in the Heerlen area, - Constructing the 6 geothermal wells, - Conducting the study and designing for the connection of new end-users to the Mijnwater heating and cooling grid, - Connecting these new end-users (approximately 10,000 to 13,000 house equivalents) to the Mijnwater heating and cooling grid. The co-funding package of the project comprises a € 90 million loan from the European Investment Bank (EIB) complemented by a € 13.5 million grant from the European Commission. The total project costs amount to € 176 million. The project focuses on phase 1 (Heerlen) of the ‘Masterplan’ described in the Territorial Just Transition Plan for the Zuid-Limburg region. The Masterplan is expected to positively impact the environment and contribute to reducing fossil fuel energy consumption. The new energy exchange system is more energy efficient, cost-effective, and environmentally sustainable compared to traditional heat pump systems using outdoor air. This will lead to less heating stress in Heerlen, up to 50% less electricity consumption, reduced impact on the electrical grid, less noise, and minimal impact on architectural design and urban landscapes. By 2030, the project is expected to connect 10,000 to 13,000 housing equivalents, resulting in additional cooling and heating capacity of approximately 37,000 to 43,000 kWth and a CO2 reduction approximately of 57,000 to 66,000 tons per year. Additionally, the project will create up to 10 jobs and employ around 100 man-years of subcontractors' work.