This 138m high double curvature concrete arch dam was constructed on the Tajan River in Mazandaran Province to provide valuable irrigation water for the fertile agricultural lands in the downstream plains of the dam.

The other objectives of the dam include flood protection and tourist attraction in the beautiful forests of Northern Iran, as well as a small hydroelectric power plant Tajan Dam was one of the first dams entirely built by Iranian firms, with Tablieh as the leading member of the Tablieh– Perlite Joint Venture.