Narva Reservoir (; ) is a reservoir by the Narva River, shared by Russia and Estonia.
The reservoir was constructed during 1955âÂÂ1956, during the Soviet era. It provides water to Narva Hydroelectric Station (installed capacity 125 MW, located on the Russian side and owned by the power company TGC-1), and cooling water to the Estonian Narva Power Plants. Its surface area at normal headwater level of is , of which belongs to Estonia. Its drainage basin is .
The overall water exchange rate is high (about 30 times a year), with some almost stagnant areas. The ecological status is estimated as "good" (as of 2007).
During the construction of the Hydroelectric plant, Soviet authorities assured the native Estonians that they would divert the Narva river to minimize the size of the reservoir, but never did, resulting in at least 8 villages being submerged under the reservoir.