You can help expand this article with text translated from the corresponding article in Russian. (July 2018) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Russian Wikipedia article at [[:ru:Фролов, Пётр Козьмич]]; see its history for attribution. You may also add the template {{Translated|ru|Фролов, Пётр Козьмич}} to the talk page. For more guidance, see Wikipedia:Translation.

Pyotr Kozmich Frolov (Russian: Пётр Козьми́ч Фроло́в; 27 January [O.S. 16 January] 1775^[1] – 22 December [O.S. 10 December] 1839^[2]) was a Russian mining engineer and inventor who built the first horse-railway in the Russian Empire in 1809. He elaborated on various canal projects and other artificial water constructions. Frolov also contributed to the development of scientific research and to the culture of the Altay region. His activities as a head of the Kolyvano-Voskresensk factories promoted a great advance of Russian technology in the beginning of the 20th century.^{[citation needed]} He was appointed a senator in 1831.^[3]