Being neglected for more than 30 years, the main collection area of the Botanical Garden of Yerevan that preserved green trees, which covers about 15 hectares territory, from now on can be irrigated anytime of year. For that purpose, with the financing by benefactor Karen Vardanyan, a 5 km long irrigation system has been constructed, a pumping station, a deep well, a 60-ton tank, 180 valves have been installed, and a water filtration basin has been built.