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Curiously, I have the largest array of high end copper gutter installations in Southern California as well as having been at the leading edge of rainwater harvesting. I've become well known for my residential drainage specializing in crawlspaces and rain water. I have some articles and links:
ARCSA recognizes our company for the work we participated in Rwanda and the teams we trained that have gone on to Tanzania, Tibet, South America. India and beyond.
This video was made during my second of five trips to Rwanda.