He was also famous in Tashkent as a competent engineer and irrigator, constructing two large canals, the Bukhar-aryk (which was poorly aligned and soon silted up) and the much more successful Khiva-Aryk, later extended to form the Emperor Nicholas I Canal, irrigating 12,000 desyatinas, 33,000 acres (134 km²) of land in the 'Hungry Steppe' (Голодная степь) between Djizak and Tashkent.
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He was a grandson of Grand Duke Nicholas Constantinovich, the disgraced grandson of Tsar Nicholas I; thus, Kirill was a patrilineal great-great-grandson of Nicholas I.