Hi John and Angela
From what I can gather from the president of the Els Reguers society of irrigators, who is based in the Els Reguers town hall, the new canal is due to follow the exact route of the present dry canal (normally dry,  except after we have had a downpour ;))  There will be an updated service road but no immediate plans for any bigger road ( there are also now canal engineers who are based in a temporary office in the Reguers town hall and have another base next door to the Reguers church).  The proposed end of the line is La Senia, where the canal we are told will be restricted in width, ie. most of the water is supposed to have been supplied to Catalan farmers (not sure what the water is going to irrigate), and only a small amount, if any,  will make it into Valencia, therefore no need for a wider canal here, (maybe that's wishful thinking).  Along the way there will be a series of 80 - 100 m high water towers to aid in the water's flow. That's maybe why we have seen a few fincas along the route (especially near to Reguers) who have decided to fence off their land.
Of course any information gained from 3rd parties must be viewed cautiously, however we found the Reguers irrigators president quite helpful. Just thought I would pass on what he told us, hope this is helpful to forum users.
ebrorob