major industries in Dagestan include oil production, engineering, chemicals, machine building, textile manufacturing, food processing and timber. Oil deposits are located in the narrow coastal region. The Dagestani oil is of high quality and is delivered to other regions. Dagestan's natural gas production goes mostly to satisfy local needs. Agriculture is varied and includes grain-farming, viticulture and wine-making, sheep-farming, and dairying. The engineering and metalworking industries own 20% of the republic's industrial production assets and employ 25% of all industrial workers. Dagestan's hydroelectric power industry is developing rapidly. There are five power plants on the Sulak River providing hydroelectric power. It has been estimated that Dagestan's total potential hydroelectric power resources are 4.4 billion kW. Dagestan has a well-developed transportation system. Railways connect the capital Makhachkala to Moscow, Astrakhan, and the Azerbaijani capital, Baku. The Moscow-Baku highway also passes through Dagestan, and there are air links with major cities. Conditions for economic development are favorable in Dagestan, but – – the republic's low starting level for a successful transition to market relations, in addition to rampant corruption, has made the region highly dependent on its underground economy and the subsidies coming from the central Russian government. Corruption in Dagestan is more severe than in other regions of the former Soviet Union and is coupled with a flourishing black market and clan-based economic system. In 2011 Rostelecom started the implementation of WDM-based equipment on the backbone network for data transmission in the Republic of Dagestan. Due to WDM introduction, the fiber-optic communication lines bandwidth increased to 2.5 Gbit/s. Rostelecom invested about 48 million rubles in the project. Culture Literature Epic-historical songs about the defeat of the armies of Persian Nadir Shah and various episodes of the nineteenth-century wars are popular among the Avars. Best-known are the ballads "Khochbar" and "Kamalil Bashir". In the second half of the nineteenth century and the beginning of the twentieth, Avar culture and literature grew significantly. Well-known Avar literary figures include the poets Aligaji of Inkho (who died 1875) and Chanka (1866–1909), the lyric poet Makhmud (1873–1919), the satirist Tsadasa Gamzat (1877–1951), and the celebrated poet Rasul Gamzatov (1923–2003). Among his poems was Zhuravli, which became a well-known Russian song. Music There is a Dagestani Philharmonic Orchestra and a State Academic Dance Ensemble. Gotfrid Hasanov, who is said to be the first professional composer from Dagestan, wrote Khochbar, the first Dagestani opera, in 1945. Dagestani folk