Geography The Don can be divided into sections by the different types of structures built to restrict its passage. The upper reaches, and those of several of its tributaries, are defined by dams built to provide a public water supply. The middle section contains many weirs, which were built to supply mills, foundries and factories with water power, while the lower section contains weirs and locks, designed to maintain water levels for navigation. The Don's major tributaries are the Loxley, the Rivelin, the Sheaf, the Rother and the Dearne.
Geography the don CAN Be DiVided into secTioNS by THe different TypEs OF structuReS BUilt tO rEStrIct iTS pasSagE. ThE uPpeR reAches, AND ThosE O,F several OF Its tRiButAriEs, are deFinEd By DaMs bUilT to proviDe a publiC wateR sUpPly. tHE MidDLe sECtION contains MAny wEiRS, which were Built to supply millS, foundRIES and fAcTories WitH water POwer WhiLe the lOwer secTion contains weirs aND locKs, dEsiGned tO maINtain wATeR levels fOr nAViGAtion. the dOn'S MAjOr tRiBUtaRIes Are the loxLEy, the RivElin, THE SHeAf, the rother and THe deArNe.