The width of the canal, which is 40 metres wide at the commencement, is gradually lessened until it reaches the aqueduct over the Dora Baltea near the 10th kilometre of its course, when its width becomes 20 metres. The sides, when not protected by retaining walls, have an inclination of 45°. Crossing the valley of the Dora, which is about 2 kilometres in width, on a high embankment, and the actual bed of the same river, by means of an aqueduct consisting of nine arches of 16 metres span each, the canal takes a north-easterly direction nearly parallel to the railway from Turin to Milan, which it crosses near the station of San Germano. At the 40th kilometre the canal passes in syphon under the torrent Elvo. This syphon is built in brickwork, and consists of five elliptical openings, 5 metres in width and 2·30 metres in height. The next work of importance is the embankment and aqueduct over the torrent Cervo, and differs but little from that over the Dora. The most important work on the whole canal, with the exception of the headworks, is the syphon for passing underneath the torrent Sesia. It is similar in section to that previously described for the Elvo, but considerably longer, and is probably one of the largest works of this class in Italy. The next works in importance are the aqueducts for crossing the torrents Roasenda and Marchiazza, and syphons under the torrents Agogna and Terdoppio, near Novara. The width of the canal up to the 62nd kilometre is 20 metres, and as, at this point, a considerable quantity of water is introduced from it into the Roggia, Busca and Rizzo-Biraga, the canal is reduced to 12·50 metres in width to the 74th kilometre, when its section is again reduced, and after passing under the Terdoppio—at which point the new branch canal “Quintino Sella” is derived—its width is only 7·50 metres. The fall of the canal between the headworks at Chivasso and the Dora Baltea varies from 0·50 to 0·25 in 1000, and over the remainder—with the exception of aqueducts and syphons, when in some cases it is greater—the gradient is 0·25 per 1000. The total fall is 21·73. Besides the works just described, 480 of less importance, consisting of bridges for roads, aqueducts, syphons for the passage of existing water-courses and canals of irrigation, watchhouses, &c., were constructed.