Water powered mills were once an important industrial function of the upper Patuxent River and its tributaries.  Water powered bone, clover, grist, fulling, and saw mills operated to support plantations and farmers living in the vicinity of the upper Patuxent River.  See an exhibit showing the history of mills that have been identified to date together with a discussion about the siting and operation of these mills and the people who built, owned, and operated these milling operations.  Meet Charles Henry Shaw, a 19^th century millwright who worked in water mills in Howard and Montgomery counties.