In the context of climate change, the management of water resources is inevitable. Haiti does not have resource problems, but they are misused. The Department of Artibonite in particular is abundant with groundwater but the population has little access to drinking water, so thousands of cubic meters flow into the sea and several thousand hectares remain without irrigation. A few rural communities have access to electricity. In order to mitigate the impacts of climate change while focusing on the particularity of ungauged rivers, we proposed a feasibility study for a hydroelectric development on the Estère River. It emphasizes three (3) components: the technical component to answer the question, is the solution technically feasible? The economic aspect to see if the proposed solution is economically profitable during the useful life of the structure and finally, the environmental and social aspect to see if the proposed solution is socially acceptable and is carried out in strict respect of the environment and in a small proportion, Quebec laws on dam safety. The solution of the proposed variant certainly has hydrological and geotechnical limits but remains within the sphere of the possible by meeting basic needs such as electricity by providing 148 GWh with an installed capacity of 22 MW, drinking water. for 400,000 people over 40 years and irrigation of more than 6,000 hectares, not to mention other indirect effects.