Civil Code (Cap. 16), article 477

477. In the absence of an agreement, the owner or other person making a grant of water from a spring or a channel is bound, towards those who, under such g rant, are entitled to make use o f such water, to carry out the wor ks required to lead the water f rom its source to the place from whi ch the water is to be taken. Owner of tenement subject to easement in respect of flow of water may freely use such water.