Ligovsky Canal

Ligovsky canalRussian:Лиговский канал
The Ligovsky canal near Znamenskaya Church. 1860s
Specifications
Maximum height above sea level	78.9 ft (24.0 m) (Difference between a mouth and a source in meter)
Status	90 % closed
History
Principal engineer	G. Skornyakov-Pisarev
Construction began	1718
Date completed	1721
Date closed	1891, 1926 and 1965-1969

TheLigovsky Canal(Russian:Ли́говский кана́л) is one of the longest canals ofSaint Petersburg(Russia). Constructed in 1721, it is 23 kilometres (14 mi) long. Its purpose was to supply water for the fountains of theSummer Garden.The canal delivered water from the river to ponds on the current Nekrasov Street.

History

The idea of constructing the canal came from the Russian tsar and reformerPeter I.He decided to decorate the Summer Garden with fountains supplied by water delivered bygravity feed.A small river, Liga (now called the Dudergofka), near (Dudergofskoye Lake), became the source of the water. The project's designer wasG. Skornyakov-Pisarev,who also supervised the canal's construction.

Except for the basic function of activating the fountains, the canal was used as awater mainand as adefensive boundary,protecting the capital from the southeast. The project was completed in three years, 1718–21. It is known that the canal had at least two bridges, one atMoskovsky Prospektand one atZnamenskya Square(from a contemporary photo). Later when theObvodny Canalwas built at the beginning of the 20th century,Yamskoi Vodoprovodniy Aqueductwas built by Russian engineer Ivan Gerard. Later a bridge overLeninsky Prospektwas constructed. Details of its dismantling are not extant. It is probable it was demolished together with the canal and has remained underground.

The flooding of 21 September [O.S.10 September] 1777 destroyed the fountains of the Summer Garden and the reason for the canal disappeared. In addition, the water in the canal became muddy and undrinkable. The canal gradually became unfit for use and was gradually filled in:

• In 1891–92, the site from theTauride Gardento Obvodny Canal was filled in. Yamskoi Vodoprovodniy Aqueduct was reconstructed in 1895 and was renamed Novo-kamenniy bridge.Granitebasins by the bridge existed before the beginning 20th century, when they were dismantled as superfluous.
• In 1926, the site from Obvodny Canal to Moskovsky Prospekt was filled in
• In 1965–69, waters of the canal were lowered in Krasnenkaya River, and the canal was truncated before crossing Krasnoputilovskaya street.

Water system of Ligovsky Canal
Dudergofskoye lake Dudergofka River 1718-1721 ToMoskovskoye s. Three highways interchange Ring Road ToBronka Three highways interchange Dachnaya street Three highways interchange Diameter To sea port terminal ToPredportovaya ToUlyanka,Ligovo ToPredportovaya ToLeninsky Prospekt ToPredportovaya ToLeninsky Prospekt ToKonstitutsii square Leninsky Pr. ToLeninsky Metro Krasnenkaya River ToKonstitutsii square Krasnoputilovskaya ToAvtovo Moscow Gate Square Moskovsky Avenue Tsarskoselskaya Railway Kubinskaya Street Obvodny Y. V. Aqueduct Aviatorov Pound Znamenskya Square Nevsky Prospect Ponds Fontanka Panteleymonovsky Aqueduct Fountains of theSummer Garden Ponds inTauride Garden Steam pump Water inlet 1720s Neva Moyka

In its place,Ligovsky Avenuewas laid out.

Present system

Near to a railway line the Liga canal waters go underground and come to the surface near the Krasnenkaya River. There the canal is divided into two channels: the majority of the canal waters are carried away by the Krasnenkaya River, the smaller branch goes underground and exits into the ponds of the Aviatorov Garden. The length of the remaining part is 11 kilometres (7 mi).

in 1834–38 on the bank of the canal theMoscow Triumphal Gatewas constructed. It was built mainly in cast iron.

The filled in Ligovsky Canal became a hindrance to the subsequent construction of a metro stationPloshchad Vosstaniya- a wet stratum greatly complicated works. They were overcome, applying acaissonwith an hydrochloric solution in 1950.