Eastern Bosphorus is a strait

Strait

A strait or straits is a narrow, typically navigable channel of water that connects two larger, navigable bodies of water. It most commonly refers to a channel of water that lies between two land masses, but it may also refer to a navigable channel through a body of water that is otherwise not...

 that separates the Muravyov-Amursky Peninsula

Muravyov-Amursky Peninsula

The Muravyov-Amursky Peninsula is a peninsula in the Peter the Great Gulf, which it subdivides into the Amur Bay to the west and the Ussuri Bay to the east. It is approximately 30 km long and 12 km wide....

 and Russky Island

Russky Island

Russky Island is a Russian island off Vladivostok, in the Peter the Great Gulf, Sea of Japan. It is located about 9,334 kilometres east of Moscow. The Eastern Bosphorus separates the island from the Muravyov-Amursky Peninsula....

, and connects Amur Bay

Amur Bay

Amur Bay is a north western part of Peter the Great Gulf.Its length is 65 km, width is 10-20 km, and depth is approximately 20 m....

 and Ussuri Bay

Ussuri Bay

Ussuri Bay is a northern east part of Peter the Great Gulf.Its length is 67 km, a wide is 10–55 km, depth is approximately 40 m.Ussuri Bay is a popular recreation area in Primorsky Krai ....

.

The depth is up to 50 m. It is about 9 km long and only 800 m wide at its narrowest point, and by June 2009 the building of a cable-stayed bridge

Cable-stayed bridge

A cable-stayed bridge is a bridge that consists of one or more columns , with cables supporting the bridge deck....

 to connect Russky Island and mainland Vladivostok

Vladivostok

The city is located in the southern extremity of Muravyov-Amursky Peninsula, which is about 30 km long and approximately 12 km wide.The highest point is Mount Kholodilnik, the height of which is 257 m...

 is well underway, with the bridge to become the longest cable-stayed bridge in the world by the virtue of its span of 1104 m.