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Danube–Black Sea Canal

Ship canal in Romania

  • 19 min read
  • 4 chapters
Danube-Black Sea Canal never Agigea (Romania)
Aleksasfi · Public domain

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Through Canal, Soviet Union and Radius

Although the idea of building a navigable canal between the Danube and the Black Sea is old, the first concrete attempt was made between 1949 and 1953, when the communist authorities of the time used this opportunity to eliminate political opponents, so the canal became notorious as the site of labor camps, when at any given time, between 5,000 and 20,000 detainees, mostly political prisoners, worked on its excavation. The total number of prisoners used as labor force during this period is unknown, with the total number of deaths being estimated at several tens of thousands. The construction works of the Danube–Black Sea Canal were to be resumed 20 years later, in different conditions.

Geography

The course of the canal follows mostly the course of the former river Carasu, originally a tributary of the Danube. Therefore, hydrographically it also has the function of conveying the runoff from a 1,031 km2 (398 sq mi) drainage basin to the Black Sea.

The main branch extends from Cernavodă on the Danube to Poarta Albă. On this reach it goes near or through the settlements of Cernavodă, Saligny, Mircea Vodă, Medgidia, Castelu, and Poarta Albă. On this reach the canal is joined on the north bank by tributaries (from west to east): Valea Cișmelei, Valea Plantației, Agi Cabul, Castelu and Nisipari. On the south bank it is joined by tributaries (from west to east) Popa Nica and Medgidia.

At Poarta Albă the canal bifurcates into two branches. The main canal goes to the south, towards the Port of Constanța Sud Agigea. It passes near the settlements of Murfatlar, Cumpăna and Agigea. On its reach it is joined on the northeast bank by tributaries Valea Seacă and Lazu and on the southwest bank by the Siminoc, Șerplea, Potârnichea and Agigea.

The northern branch, the Poarta Albă–Midia Năvodari Canal, goes towards the Port of Midia. It passes near Nazarcea, Lumina, Ovidiu and Năvodari. On its reach it is joined by tributaries Cocoș, Nazarcea and Valea Adâncă.

Motivation

The main reasons for the building of the canal were to circumvent the Danube Delta which is difficult to navigate, shorten the distance to the Black Sea and several issues related to the loading and unloading of ships.

In its delta, the Danube is divided into three main branches, none of which is suited to optimal navigation: the Chilia branch is the deepest, but its mouths were not stable, which made navigation dangerous; the Sulina branch is not deep enough for maritime ships and it also used to be isolated from the railroad system; the Sfântu Gheorghe branch is shallow and sinuous.

At the time when the decision to build the canal was taken, it was officially announced that these works would also serve a secondary purpose, that of land reclamation, with the drainage of marshes in the area. Also during the construction period, the Danube–Black Sea Canal was advertised as a fast and direct connection between the Soviet Volga–Don Canal and Central Europe.

Dimensions

The 64.4 km (40.0 mi) main branch reduces the distance by boat from Constanța to Cernavodă by ca. 400 km (250 mi). It has a width of 90–150 m (300–490 ft) and a depth of 7 m (23 ft); the northern arm has a length of 31.2 km (19.4 mi), width of 50–75 m (164–246 ft) and a depth of 5.5 m (18 ft). The radius of its sharpest bends is 3 km (1.9 mi) for the main branch, and 1.2 km (0.75 mi), for the northern branch.

The waterway passes through the towns of Medgidia and Murfatlar, both of which have been turned into inland ports. It was designed to facilitate the transit of convoys comprising as much as six towed barges, up to 3,000 in tonnage each (respectively, a total of 18,000 in tonnage), 296 m (971 ft) in length and 22.8 m (75 ft) wide (ships of up to 5,000 in tonnage, as long as 138 m (453 ft) and with as much as 16.8 m (55 ft) in beam and 5.5 m (18 ft) in draft can also pass through the canal). The structure is bound by four locks (in Cernavodă and Agigea, and in Ovidiu and Năvodari, respectively).

In its final phase, the canal took over nine years to construct; 381,000,000 m3 (1.35×1010 ft3) of soil were excavated (greater than the amount involved in building the Panama and Suez canals), and 5,000,000 m3 (180,000,000 ft3) of concrete were used for the locks and support walls.

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