Thank you for posting this link, it clarifies the options in sufficient detail to understand what was being considered and assessed. The 1463m runway of Option C looks sensible to me (retired consulting engineer), and it appears that the alternative Option C (1700m runway) with all work at the eastern end, was going to be very unpopular because of its effect on La Villiaze Road! Worth considering, but best forgotten now.
Regarding the Longue Houge incinerator project, the recent vote to drop it was a very close-run thing (21 for, 20 against), but I feel it is the right decision. 'Apples and Oranges', the runway work is crucial, burning rubbish is not.