Nera (Danube) basin and it is not navigable. After the filling of the artificial Lake Đerdap, as a result of the Iron Gate I Hydroelectric Power Station which was finished in 1972, the mouth of the river into the Danube was flooded. In order to allow the optimal electricity production, the water level of the Nera at the mouth should not go below , while it must not exceed it if the flooding of the banks is to be avoided. Since the mid-1990s, there are significant problems in fixing the river's level, as the process is costly and complicated. In 2018, representatives
Ust-Nera District as the Settlement of Ust-Nera. As a municipal division, the Settlement of Ust-Nera is incorporated within Oymyakonsky Municipal District as Ust-Nera Urban Settlement. Gold mining is the main occupation. The Kolyma Highway was extended northwest to Ust-Nera in 1937; this section is now the main route between Yakutsk and Magadan. The Ust-Nera Airport is serving air traffic. River traffic on the Indigirka is limited by the rapids downstream. There is a small museum in Ust-Nera. Ust-Nera Ust-Nera (; ) is an urban locality (an urban-type settlement) and the administrative center of Oymyakonsky District in the Sakha Republic, Russia, located