It involved moving mountains and eradicating disease and inventing and constructing by far the hugest locks and lock gates ever conceived at the time and even a 1914 General Electric computer system to run it all.
The planning application, submitted to Wiltshire Council, also includes a pedestrian and off-road cycle route, locks, pedestrian and road bridges, a new weir on the River Avon and a hydro-electric turbine.
It's all released in one colossal rush during the chorus, when everything about the song (the electric guitars, the drums, the vocals, the confusion and loss of the lyric) locks in and unloads all at once.