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St Petersburg's Orlovsky tunnel under the Neva is not abandoned but became a long term project
Kanoner writes the story of planned Orlovsky tunnel under the Neva.
A crossing over the Neva has been discussed since the 1940s. With two alternatives of a bridge and a tunnel. A bridge is not wanted. Water vessels may hit the bridge supports because of sharp turn of the Neva channel.
Kanoner writes later city entered into a concession agreement with LLC Nevskaya Concession Company (of First Quantum group) for construction of the Orlovsky tunnel. A two level and three lanes at each direction. But in 2012, the contract was terminated.
Later it appeared that the tunnel entrance space was reserved for Leningrad Siege and Defence Museum and later given to Supreme Court.
Despite of this city does not give up. In city master plans of St. Petersburg the Orlovsky tunnel is kept but sometime between 2039–2048.
http://kanoner.com/2021/02/08/167445/
from now on I add developments (updates) as comments below.
If ever built: Orlovsky tunnel will require reworking of the embankments of the Neva Otherwisto prevent a collapse. Also, it will require not only huge financial investments, but also a serious alteration of the transport infrastructure, in particular the embankments of the Neva in the places of entry and exit according to this source:
https://www.spb.kp.ru/online/news/4527715/
More talk about the Orlovsky tunnel prospect. Smolny wants to have a preliminary design of the tunnel from Metrogiprotrans by December.
The project is being discussed since 1940s but talk got more in October 2021 when Metrogiprotrans and the VIS Group proposed to the government of St. Petersburg to realize the project as a public-private partnership under a new name "Sredneokhtinsky". They propose two tunnels, which begin on the left bank of the Neva, approximately in the area of Rastrelli Square and go out on the right, between Piskarevsky Prospect and the Revolution Highway, writes Dp. No figures on the cost yet but 2018 it was estimated at 40 billion rubles.
https://www.dp.ru/a/2021/11/22/Smolnij_poprosil_podgoto
cover tunnel photo by: Matt Brown from London, England / CC BY
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http://kanoner.com/2021/02/08/167445/
Власти не хотят отказываться от строительства Орловского тоннеля — Новости строительства Санкт-Петербурга — Канонер
kanoner.comВласти Петербурга не намерены отказываться от строительства Орловского тоннеля под Невой. Хотя восемь лет назад Смольный расторг договор с концессионером, а позднее отдал сердцевину развязку под Верховный суд.