The official name (in Catalan) is carrer de s’Aiguavessant. Check https://ide.cime.es/visor/#ZXh0fGJhc2V8SURFbWVub3JjYV9NYXBhQmFzZXxsYXllcnNeXjU4MTgxMy44NTd8NDQyMTQ5OC41Mjd8NTgyMDE0Ljh8NDQyMTgzMi4zNl4kMHxANHw1fDZ8N118MXwyfDN8QF1d


It is aldo the name shown on two plates at the top and bottom of the street. I can send photos. 