[villages07]

I enjoyed the humorous replies...but, did want to clear up some of the misconceptions.

I took the Resident Academy class back in Aug 2011. It covers all the aspects of local CDD government and had a segment on the utilities that service us. Some of the maps/charts provided at that time did not extend below 466A, but, can be extrapolated.

First off, all the wastewater treatment (aka sewage) for S of 466A will be done at the plant off of Buena Vista near the Bacall golf course/Liberty Park area. They had a major expansion of that plant in the past few years to handle the new areas. So, the OP's picture is not sewage/wastewater.

What I believe it is, is a water holding tank. Our potable water comes from the Upper Floridian aquifer. There were 19 wells N of 466a on the map I have..no doubt more S of 466a. Water is pumped out of the aquifer then goes to a water treatment plant (like the facility that looks like a giant still at Turtle Mound golf course), then to a holding tank (as the OP described) or one of the tall Water towers then distributed to homes on demand.

There is a whole separate system for irrigation water that involves the lower aquifer, using treated wastewater, storage/retention ponds, pump stations, and distribution. For example, the yellow building on Bailey Trail beyond the gate and before Allamanda golf course is a Pump Station.

Then again, maybe the building is our hurricane/tornado evacuation shelter???