It was not operational between April 1946 and July 1947.

The Centre was operational between 1839 and 2011, with a number of breaks in between.

The air station was operational between 1943 and 1959.

A toy train, operational between 1985 and 1989, was a popular draw for children.

Goodhue Wind expected the project to be operational between late 2009 and early 2010.

Centralwings, a low-cost subsidiary that was operational between 2004 and 2009.

Because of that these new technologies they would become operational between 2020 and 2025.

The camp was operational between 1989 and 2006.

The plant was operational between 1938 and 1949.

In the second stage, eight bottom sluices were added to the left side of the dam which became operational between 1970 and 1971.