Hydropower is the most important renewable resource for electricity production in alpine areas: it has advantages for the global CO2 balance but creates serious environmental impacts. RES-e Directives require a renewable electricity enhance but, at the same time, the Water Framework Directive obliges member States to reach or maintain a water bodies "good" ecological status, intrinsically limiting the hydropower exploitation. Administrators daily face an increasing demand of water abstraction but lack reliable tools to rigorously evaluate their effects on mountain rivers and the social and economical outputs on longer time scale. The project intends to develop, test and promote a decision support system to merge on an unprejudiced base, river ecosystems and hydropower requirements. This approach will be led using existing scientific tools, adjustable to transnational, national and local normative and carried on by permanent panel of administrators and stakeholders. Achievements: Concrete realisations have been already achieved, in particular beta version of tools are now available on the project platform.The legal database gathers local, national and international laws & legal framework regarding hydropower, river management and authorities involved in their implementation.The contacts and organisations databases list interlocutors concerning SHARE topics in Alps identify who must or should be consulted for a HP project.The Permanent Technical Panel is beginning to act as a network of experts, technicians and engineers in the fields of HP and rivers ecosystems. The participation of public administrators, decision makers, experts and stakeholders is growing, mainly in alpine countries.http://www.alpine-space.eu/projects/running-projects/?tx_txrunningprojects_pi1[uid]=22&tx_txrunningprojects_pi1[view]=singleView