There are now many studies exploring the economy-wide impacts of large-scale projects, notably dam infrastructure performance in developing regions \cite{Kahsay_2015,Robinson_2012,Strzepek_2008,Ma_2015} (more examples - Australia \cite{Wittwer_2009}). Nevertheless, these assessments generally tend to focus on the operation stage of the involved infrastructure and less on the preceding phases, and more on the direct impacts of changes in flow regimes (e.g. electricity generated, irrigation water supplied) than on the indirect ones (e.g. sectoral interlinkages, income effects). As the use of dams for water supply and electricity generation is prone to uncertainty due to runoff variability, an emphasis on the provision of direct benefits by existing or prospective dams is justified \cite{Block_2010,Jeuland_2014,Kahsay_2015,Sridharan_2019}. Nevertheless, the short-term impacts (i.e. economic activity and job creation) occurring in the construction phase, and the medium-term implications of the different financing options (government spending, loans, grants or private investment) can influence the economic case of specific projects notably through indirect and induced effects \cite{rps2008} Add that the medium and long term impact may be important from a financing perspective.