Reservoir re-housed, historical artifacts moved or rare environments relocated. Examples include the temples of Abu Simbel (which were moved before the construction of the Aswan Dam to create Lake Nasser from the Nile in Egypt), the relocation of the village of Capel Celyn during the construction of Llyn Celyn, and the relocation of Borgo San Pietro of Petrella Salto during the construction of Lake Salto. Construction of a reservoir in a valley will usually need the river to be diverted during part of the build, often through a temporary tunnel or by-pass channel. In hilly regions, reservoirs are often constructed by
Abu Simbel temples the small sanctuary represent scenes of offerings to various gods made either by the pharaoh or the queen. On the back wall, which lies to the west along the axis of the temple, there is a niche in which Hathor, as a divine cow, seems to be coming out of the mountain: the goddess is depicted as the Mistress of the temple dedicated to her and to queen Nefertari, who is intimately linked to the goddess. Each temple had its own priest that represents the king in daily religious ceremonies. In theory, the Pharaoh would have been the only celebrant