title: Powdermill Run (White Oak Run tributary)
text: # Powdermill Run (White Oak Run tributary)
  
  Powdermill Run is a 4.36 mi (7.02 km) long 2nd order tributary to White Oak Run in Westmoreland County, Pennsylvania. This stream passes through the Powdermill Nature Preserve of the Carnegie Museum.
  
  ## Variant names
  
  According to the Geographic Names Information System, it has also been known historically as:
  
  * Powder Mill Creek
  * Powder Mill Run
  * Powdermill Creek
  * Tributary No.1 to White Oak Run
  
  ## Course
  
  Powdermill Run rises on the Linn Run/Clear Run divide about 1 mile west of Bald Knob in Westmoreland County. Powdermill Run then flows northwest to meet White Oak Run about 0.25 miles southwest of Weaver Mill, Pennsylvania.
  
  ## Watershed
  
  Powdermill Run drains 4.22 square miles (10.9 $km^2)$ of area, receives about 52.1 in/year of precipitation, has a topographic wetness index of 359.94, and has an average water temperature of 8.58 °C. The watershed is 99% forested.
  
  