One of the biggest challenges was UHVL, with 30 km of extension, that required drillings in several meters under a river. Also, adverse climatic conditions (cold, rain and snow) were constant in this project, which enhanced soil difficulties, either by its consistency or the (high) water levels, either because of the enormous need for cooperation and coordination with local communities (private owners or public entities). All of these boosted several changes along the project (either in construction as in engineering) with a habitual demand for alternative solutions. Another challenge was the pandemic outbreak, that motivated a slowdown in the project. Despite all this, CJR Renewables counted with a committed team, only focused in one main goal: the compliance with the contractual dates. The team's positive attitude and resistance made this project end a success.