P owder Mill Targeted Watershed Assessment
watershed characteristics for Powder Mill. It has a drainage area of 4.1 square miles. Figure 1 shows the location of the Powder Mill watershed within the Gwynns Falls. # Upper Gwynns Falls # Horsehead Branch # Middle Gwynns Falls # Powder Mill Run # # Lower Gwynns Falls Maidens Choice Dead Run # # Red Run # Gwynns Run North # Gwynns Run South ...