94 km, transporting 30,000 barrels of oil per day. In 1894, a similar pipeline network was built in Grozny. Shukhov designed the first Trans-Caucasian kerosene pipeline between Baku and Batumi (835 km long) and Grozny-Tuapse pipeline (618 km long). A superior design for water-mains. Shukhov designed (and Bari built) complete water-supply systems for the cities of Cherkassy, Tambov, Kharkov, Voronezh and many others. In that age of infectious diseases his water-supply systems likely saved thousands of lives. A superior design for oil-tanker barges (less than half of the metal previously required), 84 150-meters long barges were built (mostly for the Volga river) as well as the first Russian seaworthy oil tanker ship. His approach to the ship strength analysis (using the model of a shell on an elastic foundation) was absolutely novel for that time. Shukhov-designed inexpensive oil tanks with the bottom calculated as a membrane on elastic foundation. They became very popular among oil-producers of the Imperial Russia. By 1881, 130 such tanks were built in Baku alone. Shukhov made important contributions to the chemical industry: He designed and built an oil cracking plant. His patents (Shukhov cracking process – patent of Russian empire No. 12926 from 27 November 1891) on cracking were used to invalidate Standard Oil's patents (Burton process – Patent of USA No. 1,049,667 on 7 January 1913) on oil refineries. He designed an original oil pump. Shukhov's pumps revolutionized Baku's oil industry allowing to increase its oil output. He designed one of the first furnaces that used residual oil: before his work residual oil was considered a waste and was discarded, due to his work it became recognized as an important technical product known as a fuel oil. Shukhov also left a lasting legacy to the Constructivist architecture of early Soviet Russia. As a leading specialist of metallic structures (hyperboloid structures, thin-shell structures, tensile structures), he may be compared with Gustave Eiffel. Shukhov's innovative and exquisite constructions still grace many towns across the former Russian Empire: Eight thin-shell structures exhibition pavilions for the All-Russia Exhibition in Nizhny Novgorod of 1896, covering the area of 27,000 m², and featuring an unorthodox water-tower that served as a model for more than 30 similar structures built in Imperial Russia, and thousands around the world now. About 200 original towers (hyperboloid steel gridshells) all over the world, the most famous being the 160-meter-high Shukhov Tower in Moscow (1922) and