The buses involved are the 80 F-P.Moniz, 142 F-Ponta do Pargo (sometimes Faja d'Ovelho), and the 115 F-Calheta. These can be seen on rodoeste website . The 115 timetable transports workers to F and back, but there seem to be other local workings, not listed. Calheta is a big area rather than a single location, covering most of the braes between Madeleine do Mar and Prazeres, and you have not said where you are staying. If it is the coastal Calheta resort, I think the morning 80 calls, but only reaches the levada after Faja d'Ovelha. I have seen walkers arrive and depart by taxi from there to connect with the Estrela bus, but the afternoon 80 now descends to the coast. The levadas in question contour in both directions (NW & SE) from the power station (central) at about 600m. My favourite section is between the station and Prazeres. Local paths and roads can be used from upper Canhas, upper Loreto (bar Africano),and, from Estrela following the brae and then the valley NW. NW of Prazeres the levada is closer to the main road. The route shown in Underwoods' and other guidebooks around Points do Pargo takes in the pleasant terminal section of the levada. ,

This tour was free the hotel ran a bus think it was on the Wednesday I would never book a walking tour in advanced