Inside the pool, 24” diameter cross-pipes replicate the much larger pipes in the treatment plant’s conveyance tunnels. The pool’s large conveyance pipe shows the power and massive volume of treated water as gravity pulls it away from the facility via an 84” line. The conical shaped “breathing lung” at the center of the pool references the membrane filtration of plants, expanding and compressing using hydraulic mechanisms. It also revolves, recalling the rhythm and sounds of tide pools and breaching whales. Meanwhile, water weeps slowly from the walls of the pool, where it collects and then flushes suddenly, the way tides naturally filter an estuary.