A Public Information Session is being held in Newtown tonight about proposed stream flow classifications for Western Connecticut.  Stream flow standards determine the amount of alterations which can occur along a stream.  Class 1, free flow, focusing on ecological health and Class 4, heavily altered stream flows, focusing on human uses such as recreation or hydropower.  Tonight's information session is at the Western Connecticut Council of Government's office at 1 Riverside Road in Sandy Hook.  It's scheduled for 6 to 8pm.  The comment period is open until September 21st.