Claim: The initial plans for the construction of a dam on the Arda date to as early as 1948 and Ivaylovgrad hydroelectric power plant (HPP) is the last stage of the Arda cascade.
Evidence: The initial plans for the construction of a dam on the Arda date to as early as 1948. Ivaylovgrad hydroelectric power plant (HPP) is the last stage of the Arda cascade.