tramway has no significant engineering features. This section terminates at Blaen y Cwm. Here the tramway crosses Afon Croesor once more, again on a low slate bridge. Immediately on the left is Blaen y Cwm power station, a very early hydro-electric turbine, used to provide power to Croesor Quarry above. This is also the foot of the Blaen y Cwm incline which rises up the end wall of the valley. North of Blaen y Cwm From the top of the Blaen y Cwm incline the line turns sharply eastward and takes on a different character. It runs across the end of the valley, on well-built embankments and through cuttings, following the contours. About half a mile from the head of the incline it crosses a tributary of the Afon Croesor on a high bridge; the bridge was restored in the 1990s. Shortly afterwards the line curves to the north and reaches its upper terminus under the cliffs of Bwlch y Rhosydd. Here two extremely long inclines rise, one north to reach the Rhosydd Tramway and one east to reach Croesor Quarry. Branches A large number of branches from the tramway served the quarries of Cwm Croesor. The first of these branched off at the foot of the Lower Parc incline and served the Parc Slate Quarry, a significant source of traffic for the tramway. The branch ran along the east bank of the Afon Maesgwym and rose by a substantial incline to the quarry. The next branch was just south of Croesor village and served the separate Parc Slate and Slab Quarry. This branch curved away on the eastern side of the tramway and reached the quarry by a short incline. Halfway between Croesor village and the foot of the Blaen y Cwm incline, another incline branched off to the east. This incline climbed directly up the side of the valley. At the head of the incline, two tramways ran north and south along the contour line of the hill. The northern line ran via a further incline to Pant Mawr Quarry, which lies at the head of Cwm Maesgwyn. The connection to Pant Mawr was short lived, being dismantled between 1891 and 1901. It was replaced by the line heading south, which went to Fron-Boeth Quarry which was also within Cwm Maesgwyn, and about a mile south-west of Pant Mawr. The tramway to Fron-Boeth went through a long tunnel