I'm not sure exactly. Being as there aren't many of those around yet (waterfalls onto permeable paver patios), my teacher's company's display at the MN State Fair and the one at school are the only ones I know of other than a couple that his company has installed for clients. I'd assume there isn't much maintenance involved as long as the water stays flowing, below the patio there is plenty of rock for the water to run through and screen out dirt or whatever is collected.
2011 CCSB F350 6.7 Lariat
2004 CCSB F250 6.0 XLT w/ Boss 8'2" Power VXT
2001 ECLB Chevy 2500 HD 8.1 LT
2014 Diamond Cargo 8.5' x 20' Enclosed Trailer - Fully Loaded Interior
Exmark Lazer Z X-Series 52" w/ Ultravac
Exmark TTHP 36"
Graduate - Anoka Technical College w/ Associate's in Hort/Landscape - May 2013
In business since Feb 2011
23 Years Old
When you have systems, you have control.
If youíre born poor, itís not your mistake. But if you die poor, it is your mistake.