Date of this Version
The Missouri River forming the border between Nebraska and South Dakota, Iowa, and Missouri. The upper unchannelized reach extends from the Nebraska-South Dakota state line (river kilometer (rkm) 1,411) to the upper end of Lewis and Clark Lake (rkm 1,347). The lower unchannelized reach extends from Gavins Point Dam (rkm 1 ,308) to the mouth of the Big Sioux River (rkm 1,184). The upper channelized reach extends from the mouth of the Big Sioux River (rkm 1,184) to the mouth of the Platte River (rkm 959). The lower channelized reach extends from the mouth of the Platte River (rkm 959) to the Nebraska-Kansas state line (rkm 802).