True enough, CoraJack... but I've seen people "scolded" on here for posting a website address. How public is that?
Anywho... Our tour guide told us the 20K lagoon is part of an interconnecting network of waterways that channels water from Reedy Creek through the MK and on into the Seven Seas Lagoon and Bay Lake. According to the guide, the entire MK area is considered to be part of the headwaters of the Florida Everglades and Disney must be very careful with how these waters are handled.
It is my understanding the Reedy Creek waters are filtered (but not dyed) and then flow into the 20K lagoon. Waters overflow via underground pipe to the canals connecting Cinderella Castle and Swiss Family Treehouse. Waters overflow from that canal into the Jungle Cruise canals where they are dyed with biodegradable dyes to hide the track for the Jungle Cruise boats. From there, overflow waters flow to the Rivers of America. Water depth in the Rivers of America is maintained by a lock in the service canal that runs from behind Big Thunder Mountain Railroad out to Seven Seas Lagoon.
An interconnected waterway system configured as discussed above would seriously complicate removing the 20K lagoon. Sure, you could drain it and build there, but you'd cut the water supply for the castle canals, the Jungle Cruise and the Rivers of America. Still it seems they could pipe the water from the first filtering facility directly into the castle canal by extending the underground piping that's already there.
If/when they need to build on that site, they'll make a change. But not until then, I'm betting.
Alright, all you Disney engineering heads... Is that the way it works?
