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
United States Senate Committee on the Mississippi River and Its Tributaries and Its Tributaries. United States Senate Committee on the Mississippi River and Its Tributaries The United States Senate Committee on the Mississippi River and Its Tributaries was established in 1879 to replace the Select Committee on the Levee System of the Mississippi River (1870–1879) and oversaw the activities of the United States Army Corps of Engineers and the Mississippi River Commission. The committee was abolished in 1921. The Committee was at various times called the Committee on the Mississippi River and Its Tributaries, the Committee on Levees and Improvements of the Mississippi River, and the Committee on the Improvement of